D5 (CYCLOPENTASILOXANE)

CAS number: 541-02-6
EC number: 208-764-9

In beauty products, D5 (Cyclopentasiloxane) is mainly used as a conditioner, delivery agent, lubricant and solvent.
Like all other silicones, D5 (Cyclopentasiloxane) has a unique fluidity that makes it easily spreadable.

D5 (Cyclopentasiloxane) is part of a family of small silicones.
D5 (Cyclopentasiloxane)'s are clear, odorless liquids utilized in skincare products to give your skincare a smooth texture that allows the product’s key ingredients to be delivered evenly to the skin.
D5 (Cyclopentasiloxane)'s are part of the silicone family and are used in a similar way to dimethicone, which you may be familiar with.

D5 (Cyclopentasiloxane) helps smooth the texture of products, improve the appearance of scarring, increase the water-resistance abilities of formulations, and emulsify the product.
However, D5 (Cyclopentasiloxane)'s are also better at delivering active ingredients to the skin as they are more volatile than larger silicones and slowly evaporate from the skin.
When D5 (Cyclopentasiloxane)'s disappear, they leave behind the formulation’s essential ingredients.

D5 (Cyclopentasiloxane) is one of the most common ingredients used in personal care products today.
Synthetically manufactured, it is a silicone derivative that carries a variety of skin and hair applications, such as hair spray and sunscreens.
With a broader focus on uses in styling, D5 (Cyclopentasiloxane) is finding more and more popularity in hair care products, and those where a microscopic protective layer may benefit the skin.

D5 (Cyclopentasiloxane)'s are sometimes also called cyclosiloxanes; they are different names for the same class of chemicals.
When applied to the skin and hair, D5 (Cyclopentasiloxane) gives a silky and slippery feeling to the touch and acts a mild water repellent by forming a protective barrier on the skin.
D5 (Cyclopentasiloxane) can also fill in fine lines and wrinkles, giving the face a temporary “plump” look.

D5 (Cyclopentasiloxane) is a common ingredient in skincare and body care products, used to improve the texture of formulations, helping products to glide on smoothly and evenly.
D5 (Cyclopentasiloxane) also has the added benefit of acting as a protective barrier to the skin, protecting the skin from moisture loss, allergens, and bacteria.
D5 (Cyclopentasiloxane)'s are clear, odorless liquids utilized in skincare products to give your skincare a smooth texture that allows the product’s key ingredients to be delivered evenly to the skin.

D5 (Cyclopentasiloxane)'s are part of the silicone family and are used in a similar way to dimethicone, which you may be familiar with.
D5 (Cyclopentasiloxane)'s help smooth the texture of products, improve the appearance of scarring, increase the water-resistance abilities of formulations, and emulsify the product.

However, D5 (Cyclopentasiloxane)'s are also better at delivering active ingredients to the skin as they are more volatile than larger silicones and slowly evaporate from the skin.
When D5 (Cyclopentasiloxane)'s disappear, they leave behind the formulation’s essential ingredients.

INCI Name: D5 (Cyclopentasiloxane)

Other names: DecamethylD5 (Cyclopentasiloxane).

Appearance: Colorless liquid

Cosmetic applications of D5 (Cyclopentasiloxane):
Antiperspirants, deodorants, hair sprays, cleansing creams, skin creams, lotions and stick products, bath oils, sun and shaving products, make-up and nail polishes.
Siloxanes are found in lots of hair care and skin care products as conditioners that leaves hair and skin with a soft, silky, and moist feeling.

You can identify siloxanes in cosmetics by looking for the words with “-siloxane” or “-methicone” in the ingredient list.
D5 (Cyclopentasiloxane) is an odorless, colorless liquid.
D5 (Cyclopentasiloxane) is also used in the production of silicone polymers and may also be used as a dry-cleaning solvent and in industrial cleaning products.

Why is D5 (Cyclopentasiloxane) used in cosmetics?
D5 (Cyclopentasiloxane) (or CPS for short) is one of many types of silicones.
In general, silcones are known for their ability to lubricate, waterproof and provide shine.

There are many types of silcones – some have a very heavy, sticky consistency and others are very lightweight.
CPS is a water-thin so it’s very good at dispersing thicker, greasier silicones.

For this reason D5 (Cyclopentasiloxane)’s often used in combination with dimethicone.
D5 (Cyclopentasiloxane) is also volatile, which means it will evaporate.
So, not only does D5 (Cyclopentasiloxane) help spread heavier silicones but it doesn’t leave your hair feeling weighed down after it’s done.

What is D5 (Cyclopentasiloxane)?
D5 (Cyclopentasiloxane), also known as CSP, is synthetic compound, in cyclic siloxane group.
D5 (Cyclopentasiloxane) in normal terms is a silicone.

Cyclic siloxanes are mainly colorless, odorless liquid with low viscosity.
D5 (Cyclopentasiloxane) is a low-cost option for vegetable oil or any other animal source.
D5 (Cyclopentasiloxane) also acts as a volatile solvent.

Use & Benefits of D5 (Cyclopentasiloxane):
Siloxanes are preferred over other volatile alternatives because it does not leave the skin dry.
D5 (Cyclopentasiloxane) forms a thin film over skin or hair.
This film is non-greasy, but at the same time, water repellent does not let moisture evaporate and provide the emollient effect.

DESCRIPTION of D5 (Cyclopentasiloxane):
D5 (Cyclopentasiloxane) is a volatile polydimethylcyclosiloxane composed mainly of D5 (Cyclopentasiloxane).
D5 (Cyclopentasiloxane) is clear, tasteless,essentially odorless, nongreasy and non-stinging.

HOW TO USE D5 (Cyclopentasiloxane):
D5 (Cyclopentasiloxane) may be used alone or blended with other cosmetic fluids to provide a fluid base for a variety of cosmetic ingredients.
D5 (Cyclopentasiloxane) features good solubility in most anhydrous alcohols and in many cosmetic solvents.
D5 (Cyclopentasiloxane) is a volatile fluid with appreciable vapor pressure at ambient temperature.

Texture of D5 (Cyclopentasiloxane):
D5 (Cyclopentasiloxane) helps to produce a smooth, silky formulation that allows the product to spread evenly over the skin.
D5 (Cyclopentasiloxane) prevents the product from catching on dry skin patches and evens skin tone by gliding over pores and wrinkles.
D5 (Cyclopentasiloxane) ensures that all areas of the skin are receiving the key ingredients in your product.

D5 (Cyclopentasiloxane) also spreads more evenly and faster even when rubbed over the skin or hair surface.
D5 (Cyclopentasiloxane) also helps improves hair appearance, shine, and manageability.

Because of the film, the environmental effect on skin /hair can be avoided, in other words, D5 (Cyclopentasiloxane) also produces a protective film over skin and hair.
D5 (Cyclopentasiloxane) is used in skin products, sunscreens, color cosmetics, hair care, lotions, facial make-up, and rinse-off products.

D5 (Cyclopentasiloxane) is one of the most common ingredients used in personal care products today.
Synthetically manufactured, D5 (Cyclopentasiloxane) is a silicone derivative that carries a variety of skin and hair applications, such as hair spray and sunscreens.

With a broader focus on uses in styling, D5 (Cyclopentasiloxane) is finding more and more popularity in hair care products, and those where a microscopic protective layer may benefit the skin.
D5 (Cyclopentasiloxane)'s are sometimes also called cyclosiloxanes; they are different names for the same class of chemicals.

D5 (Cyclopentasiloxane) has a ring-shaped structure that makes it more volatile or less stable.
This instability allows D5 (Cyclopentasiloxane) to evaporate when applied to your skin—making it an excellent ingredient for products that need to go on smoothly but not remain sticky after application.

As all the D5 (Cyclopentasiloxane) eventually evaporates from the surface of the skin, it leaves behind the other key components in the product to work their magic.
This action of evaporation makes D5 (Cyclopentasiloxane) an excellent carrier ingredient.

D5 (Cyclopentasiloxane) is a clear, odorless, silicone-based oil that is incredibly useful and versatile in bath & body recipes.
This is a direct replacement for Cyclomethicone

Perfect as a carrier, D5 (Cyclopentasiloxane) can provide a silky and soft feel to your products, and can improve spreading qualities of fragrance as well.
Perfect for Antiperspirants, deodorants, hair care, skin care and perfumes.

D5 (Cyclopentasiloxane) (CAS n. 541-02-6, EC 208-764-9) is widely used in cosmetic products due to its unique functions as antistatic, emollient, humectant, solvent, viscosity controlling and hair conditioning agent
D5 (Cyclopentasiloxane) is safe for daily use, but how frequently and how much of the product containing the ingredient you should use depends on the product in question.
For instance, if you're using it in the form of a moisturizer (one of its common vehicles), apply it after your toners and serums to seal the products underneath it and improve absorption.

D5 (Cyclopentasiloxane) is clear, tasteless, essentially odorless, non-greasy and non-stinging.
D5 (Cyclopentasiloxane) may be used alone or blended with other cosmetic fluids to provide a fluid base for a variety of cosmetic ingredients.

D5 (Cyclopentasiloxane) features good solubility in most anhydrous alcohols and in many cosmetic solvents.
D5 (Cyclopentasiloxane) is a volatile fluid with appreciable vapor pressure at ambient temperature.

Unlike other volatile carriers used in the personal care industry, volatile silicone fluids do not cool the skin when they evaporate.
This is a consequence of their unusually low heat of vaporization.

D5 (Cyclopentasiloxane) (its full chemical name is decamethylcyclopentasiloxane, commonly known as D5, is a chemical that belong to the group of D5 (Cyclopentasiloxane)'s aka methyl siloxanes.
Siloxanes are found in lots of hair care and skin care products as conditioners that leaves hair and skin with a soft, silky, and moist feeling.

You can identify siloxanes in cosmetics by looking for the words with “-siloxane” or “-methicone” in the ingredient list.
D5 (Cyclopentasiloxane) is an odorless, colorless liquid.

D5 (Cyclopentasiloxane) is also used in the production of silicone polymers and may also be used as a dry-cleaning solvent and in industrial cleaning products.
D5 (Cyclopentasiloxane) is rated 3 out 10 (10 being most toxic) in the Skin Deep database powered by the Environmental Working Group (EWG).

D5 (Cyclopentasiloxane) is a silicone compound with the formula [(CH3)2SiO]5.
D5 (Cyclopentasiloxane) is a colorless, odorless liquid that has a low viscosity.

D5 (Cyclopentasiloxane) gives a silky and slippery feel when applied to skin and hair.
D5 (Cyclopentasiloxane) is mainly used in antiperspirants, sun-block creams, hair conditioners and skin care products.

D5 (Cyclopentasiloxane) is classified as :
-Emollient
-Hair conditioning
-Skin conditioning
-Solvent

CAS Number: 541-02-6
EINECS/ELINCS No: 208-764-9

D5 (Cyclopentasiloxane)'s are clear, odorless liquids utilized in skincare products to give your skincare a smooth texture that allows the product’s key ingredients to be delivered evenly to the skin.

KEYWORDS:
541-02-6, 208-764-9, D5 (Cyclopentasiloxane) decamethyl, Cyclomethicone 5, Dimethylsiloxane pentamer, pentaoxapentasilecane, Dow corning 345 fluid, NUC silicone VS 7158, UNII-0THT5PCI0R, KF 995

USES OF D5 (Cyclopentasiloxane):
-General adhesives and binding agents for a variety of uses
-Used to prevent adhesion
-Additives to reduce friction
-Products used to care for apparel (e.g., she polish, products to repair footwear or leather, waterproofing sprays, etc.)
-Generally related to automobiles or their manufacture, used when automotive care or automotive component are not applicable (e.g. auto fuel, GPS units), or detailed information is not known
-Relatived to the maintenance and repair of automobiles, products for cleaning and caring for automobiles (auto shampoo, polish/wax, undercarriage treatment, brake grease)
-Subcategory of beverage, food for human consumption
-Various types of paint for various uses, modifiers included when more information is known
-Related to the building or construction process for buildings or boats (includes activities such as plumbing and electrical work, bricklaying, etc)

Chem/IUPAC Name: DecamethylD5 (Cyclopentasiloxane)

D5 (Cyclopentasiloxane)
INCI: D5 (Cyclopentasiloxane)

What is D5 (Cyclopentasiloxane)?
D5 (Cyclopentasiloxane), also known as CSP, is synthetic compound, in cyclic siloxane group.
D5 (Cyclopentasiloxane) in normal terms is a silicone.

D5 (Cyclopentasiloxane) also spreads more evenly and faster even when rubbed over the skin or hair surface.
D5 (Cyclopentasiloxane) also helps improves hair appearance, shine, and manageability.

Because of the film, the environmental effect on skin /hair can be avoided, in other words, it also produces a protective film over skin and hair.
D5 (Cyclopentasiloxane) is used in skin products, sunscreens, color cosmetics, hair care, lotions, facial make-up, and rinse-off products.

Although D5 (Cyclopentasiloxane) creates a film over the hair, this film is not always desirable like many silicons as it can make the hair feel greasy and may if even take a cleansing shampoo that strips the hair of oils to get rid of the film feel to the hair (this is usually the case for curlier hair types).
This is however determined by how much of the silicon is added to D5 (Cyclopentasiloxane).

If in the formula it is close to the top of the ingredients, then this will indicate that there is a high percentage and so most likely give that film feel.
The purpose of silicons in hair conditions or shampoos is for manageability and ease of combing.

The EU in 2018 put a restriction on the use of D5 (Cyclopentasiloxane) to 0.1% in wash-off products as use above this was reported to accumulate in the water supply.
Prior to this, there was already controversy on the environmental and potential health risk D5 (Cyclopentasiloxane) could cause.

EWG has classified D5 (Cyclopentasiloxane) as safe to use in its intended concentration.
D5 (Cyclopentasiloxane) has also not been recognized as an endocrine disruptor.

D5 (Cyclopentasiloxane) is used in skin products, sunscreens, color cosmetics, hair care, lotions, facial make-up, and rinse-off products.
The purpose of silicons in hair conditions or shampoos is for manageability and ease of combing

INCI: D5 (Cyclopentasiloxane)

Consumer Uses of D5 (Cyclopentasiloxane):
-Adhesives and sealants
-Automotive care products
-Cleaning and furnishing care products
-Ink, toner, and colorant products
-Paints and coatings
-Personal care products
-Plastic and rubber products not covered elsewhere

D5 (Cyclopentasiloxane) is a clear, odorless, silicone-based oil that is incredibly useful and versatile in bath & body recipes.
This is a direct replacement for Cyclomethicone

INCI NAME: D5 (Cyclopentasiloxane)

Features & Benefits of D5 (Cyclopentasiloxane):
-Volatile carrier
-Compatible with a wide range of cosmetic ingredients
-Low surface tension
-Imparts soft silky feel to the skin
-Excellent spreading
-Leaves no oily residue or build up
-Detackification
-Non-greasy

Applications of D5 (Cyclopentasiloxane):
-A base fluid in a number of personal care products, with excellent spreading, easy rubout and lubrication properties together with unique volatility characteristics.
-Antiperspirants, deodorants, hair sprays, cleansing creams, skin creams, lotions and stick products, bath oils, suntan and shaving products, make-up, nail polishes.
-In sticks, it has the right balance between volatility and spreading.

D5 (Cyclopentasiloxane)
INCI NAME: D5 (Cyclopentasiloxane)

FEATURES of D5 (Cyclopentasiloxane):
-Volatile carrier
-Compatible with a wide range of cosmetic ingredients
-Low surface tension

BENEFITS of D5 (Cyclopentasiloxane):
-Imparts soft silky feel to the skin
-Excellent spreading
-Leaves no oily residue or build up
-Detackification
-Non-greasy

APPLICATIONS of D5 (Cyclopentasiloxane):
D5 (Cyclopentasiloxane) is a base fluid in a number of personal care products, with excellent spreading, easy rub-out and lubrication properties together with unique volatility characteristics.
D5 (Cyclopentasiloxane) is used in antiperspirants, deodorants, hair sprays, cleansing creams, skin creams, lotions and stick products, bath oils, suntan and shaving products, make-up, nail polishes.
D5 (Cyclopentasiloxane) is used in sticks, it has the right balance between volatility and spreading.

TYPICAL PROPERTIES of D5 (Cyclopentasiloxane):
Appearance: Colorless liquid
Specific gravity at 25°C (77°F): 0.95
Viscosity at 25°C (77°F) mm2.s-1: 4.0
Refractive index at 25°C (77°F): 1.397
Surface tension at 25°C (77°F): mN/m 18.0
Flash point – closed cup °C (°F): 77 (171)
Freeze point °C (°F) °C (°F): <-50 (<-58)
Boiling point at 760mm Hg: 205 (401)
Water content ppm: 250
Cyclotetrasiloxane (D4) content % <1.0

Lightweight of D5 (Cyclopentasiloxane):
D5 (Cyclopentasiloxane) is a volatile substance – like all D5 (Cyclopentasiloxane)'s.
This allows it to gradually evaporate from the skin, leaving behind the product’s key ingredients without the heaviness of other silicone-based ingredients.

One of the most significant benefits of D5 (Cyclopentasiloxane) is that it is an inexpensive ingredient for formulators.
For example, D5 (Cyclopentasiloxane) may be used as a cheap alternative to organic ingredients like vegetable glycerin, and its concentrations in skincare items can be more easily varied because it is synthetically manufactured.

Synthetic ingredients often have a bad reputation in the skincare world as they are considered not natural.
This is a bit of a misunderstanding; artificial ingredients are usually safer than their plant or animal-derived counterparts as they contain fewer impurities.
They are also better for the environment as they don’t need to be sourced from a natural resource.

Hydration of D5 (Cyclopentasiloxane):
A study published in Skin Pharmacology and Physiology investigated D5 (Cyclopentasiloxane) effect on the skin.
The study considered the occlusive nature of the D5 (Cyclopentasiloxane)'s in general.
Occlusive substances work by creating a physical barrier between the skin and the air, keeping moisture in and allergens and bacteria out.

The study found D5 (Cyclopentasiloxane)'s to be non-occlusive due to the volatile nature of the ingredients.
The volatility of the ingredient allows D5 (Cyclopentasiloxane)'s to evaporate from the skin, only forming a protective barrier for a short period.

These results are excellent news for congestive skin types as it prevents sweat and skincare ingredients being pushed deeper into the pores.
However, occlusive barriers are generally useful for drier skin types as they prevent moisture loss.
D5 (Cyclopentasiloxane)'s may still be beneficial for improving the appearance of dry skin as the rate at which the evaporation occurs provides the skin is slow, and the ingredients will still offer the skin with the protective barrier for some of the time it is on the skin.

Scarring of D5 (Cyclopentasiloxane):
D5 (Cyclopentasiloxane)'s have been suggested to improve the appearance of scars with used in conjunction with other silicone ingredients.
A study published in the Journal of Cutaneous and Aesthetic Surgery determined that silicone gel preparation significantly enhances the appearance of superficial, hypertrophic, and keloid scars.

While this research has not been conducted into D5 (Cyclopentasiloxane)'s specifically, it is related to the broader subgroup of silicones.
Many of the silicone gel preparations contain D5 (Cyclopentasiloxane) or cyclohexasiloxane, which is used at the volatile element to deliver the other silicone ingredients to the skin.

Who Should Use D5 (Cyclopentasiloxane)?
Cyclomethicone products are suitable for most skin types, including congested, dry, or sensitive skin types, as well as skin types that may have damaged skin barrier integrity.

D5 (Cyclopentasiloxane) is a silicone regularly used in cosmetic products.
D5 (Cyclopentasiloxane)’s commonly found in medical implants, sealants, lubricants, and windshield coatings.

D5 (Cyclopentasiloxane) is colorless, odorless, non-greasy, and water-thin.
D5 (Cyclopentasiloxane) doesn’t get absorbed into the skin.

Rather, D5 (Cyclopentasiloxane) evaporates quickly away from it.
This property makes D5 (Cyclopentasiloxane) a useful ingredient in cosmetic products that need to dry quickly, like antiperspirants and hair sprays.

D5 (Cyclopentasiloxane) also has lubricating properties.
This gives a slippery and silky feeling when applied to the skin and hair and allows the product to spread more easily.
Results from heating the ingredients to approximately 80°C (176°F) (care has to be taken as silicone fluid is above its flash point).All other results obtained at 25°C (77°F)

Recently many ingredients have been restricted in cosmetic products, among others:
D5 (Cyclopentasiloxane) and Cyclotetrasiloxane (D4).
Both of them are silicones, and they are used to protect the skin and to retain moisture.

Why are these ingredients being restricted?
Cyclotetrasiloxane (D4) is toxic to human reproduction system and it accumulates in the environment with unpredictable long-term effects.
D5 (Cyclopentasiloxane) can also be harmful to the environment.

The major problem is the purity of the silicone – or the lack of it.
The harmful Cyclotetrasiloxane (D4) is a common case of impurity for D5 (Cyclopentasiloxane) and it is very difficult to differentiate between them.

What do the Manufacturers need to do?
Make sure that the raw materials supplier provides you with D5 (Cyclopentasiloxane) with the highest purity (99%) and that it does not contain Cyclotetrasiloxane (D4)
As a precautionary measure – plan to reformulate rinse-off cosmetic products with D5 (Cyclopentasiloxane) by decreasing the amount until up to 0,1%, or by replacing it with another type of silicone
Restrictions on cosmetic ingredients In the EU

Cosmetic ingredients are constantly under watch by the Scientific Committee for Consumer Safety (SCCS) and Competent Authorities.
The aim is to assess their safety and establish restrictions for the protection of human health.
Silicones have been on the spot recently.

Currently the attention has turned towards one of the most widely used types – D5 (Cyclopentasiloxane).
Cosmetics manufacturers and their Responsible Persons should closely follow the updates from the SCCS and keep track of the amendments to the relevant Regulations to take the right decisions to ensure compliance of their products on the EU market.

Benefits of Cylcopentasiloxane:
Although D5 (Cyclopentasiloxane) has minimal benefits specific to the skin, it does have notable sensory properties and also helps in how the product functions.

Cylcopentasiloxane spreads easily:
Silicones are known for their slippery glide and smooth feel.
Rabach says D5 (Cyclopentasiloxane) gives products a silky smooth texture that applies easily and leaves a non-greasy finish.

Cylcopentasiloxane is inexpensive:
Rabach says because D5 (Cyclopentasiloxane) is cheaper than other similar silicones, your products that contain it will also be more affordable as a result.

Cylcopentasiloxane evaporates quickly:
D5 (Cyclopentasiloxane) is volatile, so it's often included in product formulations because it allows the products to dry faster.

Cylcopentasiloxane is lightweight:
Some silicones are heavy, but this one is particularly lightweight and used when a lighter feel is desired.
This trait is especially helpful in haircare products so as not to weigh down the hair strands.

Cylcopentasiloxane disperses heavier ingredients:
D5 (Cyclopentasiloxane) works well when combined with heavier oils or silicones because it makes them easier to spread and provides a nice feel to the skin.

Cylcopentasiloxane seals hydration:
D5 (Cyclopentasiloxane) forms a seal or barrier on the skin.
This barrier protects against transepidermal water loss (TEWL), which can lead to inflammatory conditions.

D5 (Cyclopentasiloxane) also works similarly when used on the hair by coating the hair shaft.
The molecular structure of silicones (large molecules with wide spaces between each molecule) means that the barrier they form is permeable, preventing the skin from "suffocating".

D5 (Cyclopentasiloxane)
THE GOOD:
D5 (Cyclopentasiloxane) helps to improve the texture of products, giving them a silky feel.
They also help to deliver key ingredients to the skin and protect the skin from moisture loss.

THE NOT SO GOOD:
Often will need to be combined with heavier silicones to help improve the thickness and spreadability of the product.

WHO IS IT FOR?
All skin types except those that have an identified allergy to it.

SYNERGETIC INGREDIENTS:
Works well with most ingredients.

What Are The Benefits of D5 (Cyclopentasiloxane)?
D5 (Cyclopentasiloxane) is a multifunctional ingredient in skincare and cosmetic formulations.

The main benefit is that D5 (Cyclopentasiloxane) helps to improve the texture and sensory feel of the product on the skin.
However, D5 (Cyclopentasiloxane) also has many other added benefits.

Congested skin types of D5 (Cyclopentasiloxane):
There is a general misconception that silicone-containing products cause breakouts.
These claims remain unsubstantiated by peer-reviewed research.
Studies have determined that most silicone products are non-comedogenic (not clogging) and allow the skin to breathe.

Silicones and D5 (Cyclopentasiloxane)'s do not enter the pores, where the formation of blemishes occur, and D5 (Cyclopentasiloxane) evaporates, reducing the barrier effect on the skin.
This misconception comes from anecdotal evidence, and while that can be a useful tool for driving areas of research, it does not replace an in-depth study.

One explanation for the anecdotal evidence that suggests that silicone products worsen congested skin types is that they may trap sweat or other skincare products that potentially cause breakouts, closer to the skin.
This theory hasn’t been tested but has some validity given the function of silicones.
To avoid this potential side effect, it is best to make sure you cleanse the skin after exercising and to check the ingredients in your other skincare products to see if they could be contributing to the breakouts.

Sensitivity of D5 (Cyclopentasiloxane):
D5 (Cyclopentasiloxane)) may have some capacity to reduce the appearance of wrinkles, actually help in the healing of skin blemishes and calm the visible effects of rosacea.
D5 (Cyclopentasiloxane) is an emollient that soothes and softens the skin by keeping moisture locked in.

This characteristic helps to prevent water loss and maintain the integrity of the skin’s natural barrier.
Protecting or preserving the skin’s natural barrier is an essential part of keeping sensitivity issues at bay.

Disruption of the skin’s natural barrier is considered to be linked with skin conditions such as eczema, dermatitis, and psoriasis.
If you have sensitive skin, be mindful of the other ingredients in your product that may irritate, such as fragrance, because the D5 (Cyclopentasiloxane) will deliver these ingredients effectively to the skin. In some cases, minor irritation may occur from the use of silicones, but it’s not usually the source of sensitivity in a product.

Is D5 (Cyclopentasiloxane) Safe?
D5 (Cyclopentasiloxane) is considered to be a safe ingredient for its indicated uses in skincare and cosmetics.
The Cosmetic Ingredient Review Expert Panel, a US organization that determines the safety of cosmetic and skincare ingredients, concluded in 1991 that compounds containing D5 (Cyclopentasiloxane) safe for use.
Further reviews conducted in 2005 supported its use.

Environment:
One issue with D5 (Cyclopentasiloxane) is its potential impact on the environment.
D5 (Cyclopentasiloxane) doesn’t readily degrade.

This may have a disrupting effect on the environment.
As a precautionary measure, the European Union in 2020, limited concentrations of D5 (Cyclopentasiloxane) in products to 0.1%. 0.1% is generally the concentration it is used at, so this is unlikely to affect the formulation of your favorite skincare products if other countries adopt this same policy.

What is D5 (Cyclopentasiloxane) used for?
D5 (Cyclopentasiloxane) is known for being able to evaporate and dry quickly.
Silicones are also known to repel water and glide easily.
This is why they are commonly used as ingredients in lubricants and sealants.

They are also known to form a protective barrier on the skin and hair.
D5 (Cyclopentasiloxane) can help you detangle your hair, prevent breakage, and reduce frizz.

D5 (Cyclopentasiloxane) can be found in a wide range of personal care products.

Products which D5 (Cyclopentasiloxane) include:
-hair spray
-sunscreen
-antiperspirant
-deodorant
-hair conditioner
-shampoo
-hair detangling products
-waterproof mascara
-foundation
-eyeliner
-concealer
-moisturizer with SPF
-eye shadow
-hairstyling gel and lotion
-lipstick

D5 (Cyclopentasiloxane) sometimes appears on a label as decamethylD5 (Cyclopentasiloxane) or D5.
D5 (Cyclopentasiloxane) may also be put under the broader category name of cyclomethicone.
D5 (Cyclopentasiloxane)’s different from another siloxane known as dimethicone or polydimethylsiloxane (PDMS).

Is D5 (Cyclopentasiloxane) safe?
One of the main benefits of D5 (Cyclopentasiloxane) compared to similar ingredients is that it’s less expensive.
This helps lower the cost of your favorite products.
Of course, the lower cost means there’s an incentive for manufacturers to use it instead of other ingredients, regardless of its safety or environmental impact.

Safety concerns in humans:
The Environmental Working Group (EWG) found that there’s a low concern that D5 can be considered an endocrine disrupter, or something that can disturb the normal functioning of your hormones.
D5 (Cyclopentasiloxane) could be more of a concern when it’s used at concentrations higher than what is typically used in cosmetics.
The Cosmetic Ingredient Review Expert Panel considers the chemical safe to use at existing concentrations.

D5 (Cyclopentasiloxane) inhaled, it’s either quickly exhaled or broken down and excreted in urine.
This means that accumulation of D5 (Cyclopentasiloxane) in the body is unlikely.

D5 (Cyclopentasiloxane) also wasn’t found to cause skin irritation or sensitization in humans.
When used in sunscreens and lotions, research shows it may even prevent irritation in patients with skin conditions like rosacea.

Environmental hazards of D5 (Cyclopentasiloxane):
There is some controversy surrounding the environmental impact of this ingredient.
Chemicals used in hair and skin products can make their way into the environment when they’re rinsed down the drain.
These products may then accumulate and harm fish and other wildlife.

D5 (Cyclopentasiloxane) was once considered hazardous to aquatic wildlife.
D5 (Cyclopentasiloxane) was found in laboratory studies to be bio-accumulative in some aquatic animals.
This prompted a Canadian review board to conduct more research about the environmental impact of this chemical.

A 2011 review concluded that D5 (Cyclopentasiloxane) didn’t pose a danger to the environment.
The review board found no evidence of toxicity to any organism.
The board also didn’t find evidence that the chemical can build up to high enough concentrations to cause problems in animals.

A 2013 study found that the chemical evaporates during typical use.
Only a very small fraction of the chemical finds its way down the drain and into the environment.
This amount is considered negligible by the study authors.

The bottom line:
Products containing D5 (Cyclopentasiloxane) can be used safely on your hair and skin with minimal personal risk.
D5 (Cyclopentasiloxane) helps your skin and hair products dry quickly and spread more easily.

D5 (Cyclopentasiloxane) can make the hair feel silky without weighing it down.
Though there is a concern that this ingredient can disrupt hormones in your body, research shows that it doesn’t get absorbed into the skin in high enough doses to cause harm.

D5 (Cyclopentasiloxane) is possible that D5 could accumulate in water supplies when used in concentrations above 0.1% and when washed off before evaporating.
This possibility has led to increased regulation of its use in some countries.

DECAMETHYLD5 (Cyclopentasiloxane)
541-02-6
D5 (Cyclopentasiloxane), decamethyl-
Cyclomethicone 5
CYCLOMETHICONE
Dimethylsiloxane pentamer
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
Dow corning 345 fluid
NUC silicone VS 7158
Cyclic dimethylsiloxane pentamer
Dekamethylcyklopentasiloxan
UNII-0THT5PCI0R
DdecamethylD5 (Cyclopentasiloxane)
Union carbide 7158 silicone fluid
KF 995
VS 7158
0THT5PCI0R
DecamethylD5 (Cyclopentasiloxane), 97%
MFCD00046966
Dow corning 345
Silicon SF 1202
D5 (Cyclopentasiloxane), 2,2,4,4,6,6,8,8,10,10-decamethyl-
CCRIS 1328
HSDB 5683
Dekamethylcyklopentasiloxan [Czech]
EINECS 208-764-9
decamethyl D5 (Cyclopentasiloxane)
SF 1202
BRN 1800166
Ciclopentasiloxane
Cyclomethicone D5
D5 Cyclomethicone
dimethylD5 (Cyclopentasiloxane)
Decamethylcylopentasiloxane
DSSTox_CID_7184
ACMC-209ld1
EC 208-764-9
DSSTox_RID_78338
DSSTox_GSID_27184
SCHEMBL28497
4-04-00-04128 (Beilstein Handbook Reference)
KSC493E2H
CHEMBL1885178
DTXSID1027184
CTK3J3223
BCP15826
Tox21_303170
ANW-31955
CD3770
AKOS008901199
ZINC169743678
DB11244
MCULE-6274880347
2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane
KS-00000X48
NCGC00163981-01
NCGC00257224-01
AK608817
AS-59731
CAS-541-02-6
SC-81690
D1890
D3770
DecamethylD5 (Cyclopentasiloxane) (cyclic monomer)
FT-0665531
S05475
DecamethylD5 (Cyclopentasiloxane), analytical standard
Q414350
decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
UNII-NMQ347994Z component XMSXQFUHVRWGNA-UHFFFAOYSA-N
Cyclomethicone 5, United States Pharmacopeia (USP) Reference Standard
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane #
D5 Cyclomethicone, Pharmaceutical Secondary Standard; Certified Reference Material
2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane
2,2,4,4,6,6,8,8,10,10-decamethylD5 (Cyclopentasiloxane)
D5
decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
Decamethylcyclopentasiloxan
DECAMETHYLD5 (Cyclopentasiloxane)
DecamethylD5 (Cyclopentasiloxane)
decamethylD5 (Cyclopentasiloxane)
DecamethylD5 (Cyclopentasiloxane)
decamethylD5 (Cyclopentasiloxane), D5
D5 (Cyclopentasiloxane), 2,2,4,4,6,6,8,8,10,10-decamethyl-
decamethyl D5 (Cyclopentasiloxane)
2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecan
2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane
decamethylD5 (Cyclopentasiloxane)
dow corning 345
silicon SF 1202
union carbide 7158 silicone fluid
0THT5PCI0R
1800166
208-764-9
541-02-6
Cyclic dimethylsiloxane pentamer
cyclomethicone 5
D5 Cyclomethicone
decamethyl D5 (Cyclopentasiloxane)
DecamethylD5 (Cyclopentasiloxane)
Decamethyl-D5 (Cyclopentasiloxane)
Dekamethylcyklopentasiloxan
GY5945200
MFCD00046966
1,3,5,7,9,2λ2,4λ2,6λ2,8λ2,10λ2-pentaoxapentasilecane
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
D5;4-04-00-04128
4-04-00-04128 (Beilstein Handbook Reference)
CYCLOMETHICONE
D5 (Cyclopentasiloxane)
D5 (Cyclopentasiloxane), decamethyl-
D5;DdecamethylD5 (Cyclopentasiloxane)
decamethy lD5 (Cyclopentasiloxane)
decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane;decamethylD5 (Cyclopentasiloxane) 97%
decamethylD5 (Cyclopentasiloxane) 99%
decamethylD5 (Cyclopentasiloxane)
decamethylD5 (Cyclopentasiloxane), 97%
Dekamethylcyklopentasiloxan
Dimethylsiloxane pentamer
Dow corning 345
Dow corning 345 fluid
EINECS 208-764-9
NCGC00163981-01
NUC silicone VS 7158
Silicon SF 1202UNII
0THT5PCI0RUNII-0THT5PCI0RUnion carbide 7158 silicone fluid
DECAMETHYLD5 (Cyclopentasiloxane);
541-02-6
D5 (Cyclopentasiloxane), decamethyl-
Cyclomethicone 5
CYCLOMETHICONE
Dimethylsiloxane pentamer
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
Dekamethylcyklopentasiloxan
UNII-0THT5PCI0R
DdecamethylD5 (Cyclopentasiloxane)
0THT5PCI0R
DecamethylD5 (Cyclopentasiloxane), 97%
MFCD00046966
Dow corning 345 fluid
Dow corning 345
NUC silicone VS 7158
Silicon SF 1202
D5 (Cyclopentasiloxane), 2,2,4,4,6,6,8,8,10,10-decamethyl-
Cyclic dimethylsiloxane pentamer
Union carbide 7158 silicone fluid
KF 995
VS 715
CCRIS 1328
HSDB 5683
Dekamethylcyklopentasiloxan
EINECS 208-764-9
decamethyl D5 (Cyclopentasiloxane)
SF 1202;BRN 1800166
Ciclopentasiloxane
Cyclomethicone D5
D5 Cyclomethicone
dimethylD5 (Cyclopentasiloxane)
Decamethylcylopentasiloxane
DSSTox_CID_7184
ACMC-209ld1
EC 208-764-9
DSSTox_RID_78338
DSSTox_GSID_27184
SCHEMBL28497
4-04-00-04128 (Beilstein Handbook Reference)
CHEMBL1885178
DTXSID1027184
BCP15826
Tox21_303170
ANW-31955
CD3770
AKOS008901199
ZINC169743678
DB11244
MCULE-6274880347;2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane
NCGC00163981-01
NCGC00257224-01
AK608817
AS-59731
SC-81690
D1890;D3770
DecamethylD5 (Cyclopentasiloxane) (cyclic monomer)
FT-0665531
S05475
DecamethylD5 (Cyclopentasiloxane), analytical standard
Q414350
decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
UNII-NMQ347994Z component XMSXQFUHVRWGNA-UHFFFAOYSA-N
Cyclomethicone 5, United States Pharmacopeia (USP) Reference Standard
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane #
D5 Cyclomethicone, Pharmaceutical Secondary Standard
Certified R