Dicumyl Peroxide = DCP = DI-CUP

CAS number: 80-43-3
EC number: 201-279-3
Molecular formula:  C18H22O2
Molecular weight: 270.38

Dicumyl peroxide is primarily used in the manufacture of polymers and elastomers. 
Dicumyl peroxide is White crystal, insoluble in water, dissolving in alcohol, ether, benzene, and other organic solvents. 
Dicumyl peroxide is sublimable in high vacuum.
Dicumyl peroxide is 98% pure dicumyl peroxide in flakes. It is mainly used as cross-linking agent for polymers and elastomers.
Dicumyl peroxide is mainly used for polyolefines and rubber to produce hose, wires,tires and rubber seals.
Dicumyl peroxide is also suitable as synergist in halogenated flame retarded EPS.
Dicumyl Peroxide is an organic dialkyl peroxide commonly used for cross-linking/curing of elastomers and plastomers, as well as being used as a polymerization initiator for polystyrene and as a curing agent for unsaturated polyesters.
As a replacement for sulfur, Dicumyl peroxide is the curing agent most commonly used in the most diverse rubber industries; when there is no need to produce odorless artifacts, for having a good cure speed and mainly low cost when compared to other types of organic peroxides.

Dicumyl peroxide (DCP) is used:
Dicumyl peroxide (DCP) is used in vulcanization of rubber
Dicumyl peroxide (DCP) is used as a crosslinking agent in the synthesis of polylactic acid composite fibers
Dicumyl peroxide (DCP) is used in the preparation of polyethylene composites
Dicumyl peroxide (DCP) is used in the synthesis of polyamide 112/ethylene vinyl acetate copolymer blends.

An efficient organic peroxide cross-linking agent for PE, EVA, EPR, Silicone and VAE.
Cross-linking agent for EVA foam sheet, EVA shoe sole and PE foam.
Initiator of polymerization of Styrene, mainly used for EPS resin.
Initiator/cross-linking agent for XLPE, mainly used for cable insulation material.
Curing agent or hardener for UP resin, acrylic resin.

The DICUMYL PEROXIDE molecule contains a total of 42 atom(s). 
There are 22 Hydrogen atom(s), 18 Carbon atom(s) and 2 Oxygen atom(s). 
A chemical formula of DICUMYL PEROXIDE can therefore be written as:
The chemical formula of DICUMYL PEROXIDE shown above is based on the molecular formula indicating the numbers of each type of atom in a molecule without structural information, which is different from the empirical formula which provides the numerical proportions of atoms of each type.
The above chemical formula is the basis of stoichiometry in chemical equations, i.e., the calculation of relative quantities of reactants and products in chemical reactions. 
The law of conservation of mass dictates that the quantity of each element given in the chemical formula does not change in a chemical reaction. 
Thus, each side of the chemical equation must represent the same quantity of any particular element based on the chemical formula.

Dicumyl peroxide (DCP) is used:
Dicumyl peroxide (DCP) is used in vulcanization of rubber
Dicumyl peroxide (DCP) is used as a crosslinking agent in the synthesis of polylactic acid composite fibers
Dicumyl peroxide (DCP) is used in the preparation of polyethylene composites
Dicumyl peroxide (DCP) is used in the synthesis of polyamide 112/ethylene vinyl acetate copolymer blends
vapor density: 9.3 (vs air)
vapor pressure: 15.4 mmHg ( 38 °C)
assay: 98%
mp: 39-41 °C (lit.)
density: 1.56 g/mL at 25 °C (lit.)
storage temp.: 2-8°C

Dicumyl peroxide is used as a cross linking agent in the synthesis of polylactic acid composite fibers and in preparation of polyethylene composites.

Dicumyl Peroxide, DCP, DI-CUP, 80-43-3, 201-279-3, Cumene peroxide, Cumyl peroxide, Peroxide bis(1-methyl-1-phenylethyl), dicumylperoxide, Percumyl D

Our comapny is involved expertise in manufacturing and supplying a premium quality assortment of Dicumyl Peroxide (DCP). 
Dicumyl peroxide is developed from high chemical compounds and innovative machinery in compliance with the set industry norms. 
Dicumyl peroxide is used as a polymerizing initiator, catalyst and vulcanizing agent. 
Dicumyl peroxide (DCP) is a cross-linking agent in EVA and polyolefin and flame retardant for alkyl aromatic resins. 

Stability:Stability Reacts violently with reducing agents, heavy metals, concentrated acids, concentrated bases. 
May ignite organic materials on contact. 
May decompose violently upon exposure to sunlight or if heated. 
Incompatible with strong oxidizing agents.

The Dicumyl peroxide, with the CAS registry number 80-43-3, is also known as Bis(2-phenyl-2-propyl) peroxide. 
Dicumyl peroxide belongs to the product categories of Additives for Plastic; Organics. Its EINECS registry number is 201-279-3. 
Dicumyl peroxide's molecular formula is C18H22O2 and molecular weight is 270.37. Its IUPAC name is called 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene. 
What's more, Dicumyl peroxide is white powder with a characteristic odor. Dicumyl peroxide can be used as initiator of monomer polymerization. 
Dicumyl peroxide can also be used as sulfurization agent, crosslinking agent, curing agent and flame retardant additives of high polymer material.
Preparation of Dicumyl peroxide: this chemical can be prepared by cumyl hydroperoxide and sodium sulfite. 
Reaction of Dicumyl peroxide will need catalyst perchloric acid and solvent 10% NaOH. 
The yield is about 97%.

Di-Cup dicumyl peroxide is used as a high temperature catalyst in the rubber and plastics industries.
Compounds containing Di-Cup are normally processed at temperatures up to 250°F (121°C) and can be cured at temperatures above 300°F (149°C). 

DPL is the leading wholesaler and supplier of Dicumyl Peroxide DCP 99%  in Delhi and all around India. 
With relentless research and development into chemicals and additives, DPL always brings innovative solutions to meet our customer’s needs today and for the future. 
DPL offers DCP – a crosslinking agent use to produce a variety of polymers with exceptional durability. 
Dicumyl peroxide is used in versatile polymers application such as XLPE foam sheets, hose pipes and hawai chappals etc.

Dicumyl peroxide is available in pure form or as supported grades (40% peroxide on an inorganic substrate or as a rubber Masterbatch). 
The molecular weight of dicumyl peroxide is 270; its structural formula is below. 
Di-Cup R dicumyl peroxide, a pale yellow to white granular solid, melts at 100°F (38°C). 
Di-Cup 40C and Di-Cup® 40KE are free-flowing off-white powders under normal storage conditions. 
Tests have shown that these materials do not lump or cake below 100o F (38°C). 

Solubility Di-Cup
Dicumyl peroxide, at practical use concentrations, is soluble in a variety of organic compounds, as shown in
Dicumyl peroxide is soluble, or disperses readily, in natural and synthetic rubber compounds, silicone gums, and polyester resins. It is soluble in vegetable oils and insoluble in water

Peroxide: Compound containing the peroxy group (-O-O-), chainlike structure, containing two oxygen atoms, each of which is bonded to the other and to a radical or some element. 
Dicumyl peroxide is considered that hydrogen peroxide is the starting material to prepare organic and inorganic peroxides commercially. 
Hydrogen Peroxide H2O2, is a powerful oxidizing agent. 
The most valuable property of hydrogen peroxide is that it breaks down into water and oxygen and therefore does not form any persistent, toxic residual compounds. 
Dicumyl peroxide is used in the processes of epoxidation, oxidation, hydroxylation and reduction. 
Dicumyl peroxides oxidizing properties are used in the bleachings and deodorizing for textile, hair and in paper manufacture. 
Dicumyl peroxide is also used medicinally as an antiseptic.  
Dicumyl peroxides application involves the production of chemicals like perhydrates as well as organic peroxides in which some organic (or inorganic) substituents have replaced one or both hydrogens. 
Some metals form peroxides in air sodium, barium or zinc. 
Metal peroxide releases oxygen slowly in contact with atmospheric moisture and used to as disinfectants in cosmetics, detergents, toothpaste and pharmaceuticals. 
Dicumyl peroxide can be used in the bleachings and deodorizing and a oxygen release source in agricultural application to generate contaminated soils and lakes. 
Organic Peroxides are powerful oxidizing agents releasing oxygen. 
Dicumyl peroxide is widely used as initiators,catalysts and crosslinking agent for the polymerization process in the plastics manufacturing industry and as chemical intermediates, bleaching agents, drying and cleaning agents. 
Dicumyl peroxide is also used as antiseptics, disinfectants and germicides medically for cosmetics, detergents, toothpaste and pharmaceuticals. 
Organic peroxides are classified in peroxydicarbonates, peroxyketals, peroxyesters, ketone peroxides, hydroperoxides, dialkyl peroxides, diacyl peroxides by HMIS.
Dicumyl peroxide is a strong free radical source ; used as a polymerization initiator, catalyst and vulcanizing agent. 
The half-life temperatures are 61 C (for 10 hours), 80 C (1 for 1 hour) and 120 C (for 1 minute). 
DCP decomposes rapidly, causing fire and explosion hazard, on heating and under influence of light. 
Dicumyl peroxide reacts violently with incompatible substances or ignition sources (acids, bases, reducing agents, and heavy metals). 
Dicumyl peroxide is recommended to store in a dry and refrigerated (< 27C or 39 C max) and to keep away from reducing agents and incompatible substances.

Dicumyl peroxide is an organic peroxide. 
The peroxide bond with its two oxygen atoms is easily broken up. 
For this reason, organic peroxides are often used as free radical sources in polymerizations and similar reactions. 
Dicumyl peroxide is among the less reactive of the organic peroxides. 
Large amounts of dicumyl peroxide are used as cross-linking agents in the polymer industry. 
Exposure of the workers to this compound may occasionally be high, for example when sacks of dicumyl peroxide are cut open and the peroxide is poured into hot melting tanks. 
This operation is sometimes performed without any protective equipment.

For Polymer production: Polymerization of styrene: 
Perkadox BC-FF may be used for the (co)polymerization of styrene in the temperature range of 110-165°C. 
In a mass process Perkadox BC-FF can be advantageously used to increase polymerization rates. 
Coagent in flame-retardant polystyrene: 
Perkadox BC-FF may also be used as synergistic co-agent in combination with halogen containing flame retardants to produce flame-retardant expandable polystyrene. 
For Crosslinking: 
Perkadox BC-FF is a monofunctional peroxide which is used for the crosslinking of natural rubber and synthetic rubbers, as well as polyolefins. 
Rubber compounds containing Perkadox BC-FF have excellent scorch safety, and under certain conditions one step mixing is possible. 
Safe processing temperature: 
130°C (rheometer ts2 > 20 min.). 
Typical crosslinking temperature: 
170°C (rheometer t90 about 12 min.). 
For Thermoset: 
Perkadox BC-FF is a special purpose high temperature initiator for the curing of unsaturated polyester, vinyl ester and acrylic thermosetting resins.

Chemical Properties:
white powder

Chemical Properties:
Dicumyl peroxide is a crystalline solid that melts at 42°C. 

Dicumyl peroxide is insoluble in water and soluble in vegetable oil and organic solvents . 
Dicumyl peroxide is used as a high-temperature catalyst in production of polystyrene plastics. 
The deflagration hazard potential of this peroxide was tested using 5 g of igniter in the revised time–pressure test, but no pressure rise was produced . 
Noller et al. found Dicumyl peroxide to be an intermediate fire hazard.

General Description:
White powder with a characteristic odor.

Reactivity Profile:
The explosive instability of the lower dialkyl peroxides (e.g., dimethyl peroxide) and 1,1-bis-peroxides decreases rapidly with increasing chain length and degree of branching, the di-tert-alkyl derivatives being amongst the most stable class of peroxides. 
Though many 1,1-bis-peroxides have been reported, few have been purified because of the higher explosion hazards compared with the monofunctional peroxides. 
Dicumyl peroxide is unlikely that this derivative would be particularly unstable compared to other peroxides in it's class, Bretherick 2nd ed., p 44 1979.

Safety Profile:
Mildly toxic by ingestion. 
See also PEROXIDES. 
When heated to decomposition it emits acrid smoke and irritating fumes.

A process for the preparation of dicumyl peroxide by reaction of dimethylbenzyl hydroperoxide (cumene hydroperoxide) with dimethyl phenyl carbinol in the presence of a catalytic quantity of a phosphorous halide or oxyhalide is described. 
Dicumyl peroxide gives good yields of the useful reaction product and a high selectivity.

Separated from combustible substances, reducing agents, strong oxidants, strong acids, bases and heavy metals. 
Keep in the dark. 
Well closed. 
Keep under inert gas. 

Bis(1-methyl-1-phenylethyl) peroxide, Bis(α,α-dimethylbenzyl) peroxide
Quality Level: 200
vapor density: 9.3 (vs air)
vapor pressure: 15.4 mmHg ( 38 °C)
assay: 98%
reaction suitability: reagent type: oxidant
mp: 39-41 °C (lit.)
density: 1.56 g/mL at 25 °C (lit.)
storage temp.: 2-8°C
SMILES string: CC(C)(OOC(C)(C)c1ccccc1)c2ccccc2
InChI: 1S/C18H22O2/c1-17(2,15-11-7-5-8-12-15)19-20-18(3,4)16-13-9-6-10-14-16/h5-14H,1-4H3
Alternate Names:Bis(1-methyl-1-phenylethyl) peroxide; Bis(α,α-dimethylbenzyl) peroxide; Cumene peroxide
CAS Number:80-43-3
Molecular Weight:270.37
Molecular Formula:C18H22O2
Supplemental Information:This is classified as a Dangerous Good for transport and may be subject to additional shipping charges.

A method for the determination of dicumyl peroxide in workplace air was developed and applied. 
Micro-impinger bottles and personal air sampling pumps were used for the sampling. 
Gas chromatography/mass spectrometry was used for the analytical separation and quantitative determination. 
The technique makes it possible to monitor peroxide concentrations down to 5 µg/m3 in air.

Dicumyl peroxide (DCP) is used: 
Dicumyl peroxide is used in vulcanization of rubber.
Dicumyl peroxide is used as a cross linking agent in the synthesis of polylactic acid composite fibers.
Dicumyl peroxide is used in the preparation of polyethylene composites.
Dicumyl peroxide is used in the synthesis of polyamide 112/ethylene vinyl acetate copolymer blends.

Dicumyl peroxide (DCP) is commonly applied as a cross-linking agent in polymer processing. 
The main aim of this work was to assess the ability of DCP to improve adhesion between polylactide (PLA) and flax or hemp fibres by their interphase cross-linking. 
Short fibre-reinforced PLA composites were manufactured due to the importance of short fibres in injection moulding of high-quality biocomposites. 
Reactive extrusion of the PLA, flax or hemp fibres, and DCP was performed. 

Soluble in chloroform and most organic solvents. 
Insoluble in water.
Store at 4°C. 
Incompatible with oxidizing agents and acids.

Air & Water Reactions
No rapid reaction with air No rapid reaction with water
Fire Hazard
Excerpt from ERG Guide 145 

May explode from heat or contamination. 
May ignite combustibles (wood, paper, oil, clothing, etc.). 
May be ignited by heat, sparks or flames. 
May burn rapidly with flare-burning effect. 
Containers may explode when heated. 
Runoff may create fire or explosion hazard. (ERG, 2016)
Health Hazard
Excerpt from ERG Guide 145 
Fire may produce irritating, corrosive and/or toxic gases. 
Ingestion or contact (skin, eyes) with substance may cause severe injury or burns.
Runoff from fire control or dilution water may cause pollution. 
Reactivity Profile
The explosive instability of the lower dialkyl peroxides (e.g., dimethyl peroxide) and 1,1-bis-peroxides decreases rapidly with increasing chain length and degree of branching, the di-tert-alkyl derivatives being amongst the most stable class of peroxides. 
Though many 1,1-bis-peroxides have been reported, few have been purified because of the higher explosion hazards compared with the monofunctional peroxides.

Organic Peroxides are more or less stable products but will decompose under the influence of heat. 
To minimize a loss of quality during storage, it is important that the recommended maximum storage temperature is not exceeded. 
If a minimum storage temperature is given, an undesirable process such as a solidification or phase separation, is known to occur below this temperature.

Cumene peroxide
Cumyl peroxide
Peroxide, bis(1-methyl-1-phenylethyl)
Percumyl D
Perkadox B
Diisopropylbenzene peroxide
Perkadox BC
Perkadox SB
Dicumenyl peroxide
Percumyl D 40
Luperox 500
Luperox 500R
Luperox 500T
Dicumene hydroperoxide
Kayacumyl D
DiCup 40KE
Active dicumyl peroxide
Di-cup 40C
Varox dcp-R
Varox dcp-T
Isopropylbenzene peroxide
Luperco 500-40C
Luperco 500-40KE
Perkadox BC 9
Di-cup R
Di-cup T
Di-cup 40haf
Perkadox BC 40
Perkadox BC 95
Bis(1-methyl-1-phenylethyl) peroxide
Bis(2-phenyl-2-propyl) peroxide
NSC 56772
Bis(alpha,alpha-dimethylbenzyl) peroxide
Peroxide, bis(alpha,alpha-dimethylbenzyl)
.alpha.-Cumyl peroxide
Di-.alpha.-cumyl peroxide
.alpha.,.alpha.'-Dicumyl peroxide

A method has been developed for the determination of dicumyl peroxide in polystyrene plastic materials that may contain other organic peroxides. 
The dicumyl peroxide is extracted from the plastic with acetone and separated from the other additives present by thin-layer chromatography on silica gel. 
The silica gel in the area that contains the dicumyl peroxide is transferred to a small reaction flask and the peroxide determined by a micro-titration procedure.
Formulations containing 0·25 to 0·5 per w/w of dicumyl peroxide have been analysed by this method with a precision of ±12 per of the determined value. Other organic peroxides commonly used in polystyrene formulations do not interfere.

Infrared Spectrum Authentic
Flash Point >110°C
Melting Point 38.0°C to 41.0°C
Quantity 100g
Packaging Plastic bottle
Color White
Assay Percent Range 98.5% min. (Iodometry)
Linear Formula [C6H5C(CH3)2]2O2
Solubility Information    Solubility in water: insoluble in water. Other solubilities: soluble in most organic solvents
Formula Weight 270.37

Acid-catalyzed decomposition of dicumyl peroxide in dodecane from 60 to 130 °C produces α-methylstyrene and phenol as the major products. 
Pseudo-first-order rate constants were determined as a function of the temperature for the reaction of DCP with dodecylbenzenesulfonic acid in dodecane and resulted in an Arrhenius plot exhibiting two distinct kinetic regimes with differing activation energies: 76.9 kJ/mol at low temperatures (measured from 60 to 90 °C) and 8.50 kJ/mol at higher temperatures (measured from 90 to 130 °C). 
With employment of a combination of kinetics, product analysis, and trapping experiments, evidence is presented to show the intermediacy of cumene hydroperoxide—a reactive intermediate absent from previous mechanistic descriptions of this process. 
The yield of cumene hydroperoxide production is discussed, and the mechanistic pathways for formation of the observed products are presented.

Cure Time and Temperature
Di-Cup dicumyl peroxide decomposes when heated to form alkoxy radicals that, in turn, abstract hydrogen from the polymer backbone, forming polymer radicals. 
A combination of two polymer radicals results in a crosslink. 
In general, the cure rate (or rate of crosslinking) is equivalent to the rate of Di-Cup® peroxide thermal decomposition.
The rate of Di-Cup cure, therefore, is dependent primarily on cure temperature and is predictable for each polymer system. 
Care should be exercised to differentiate between rate of cure and state of cure. In a given polymer, rate of cure with Di-Cup is affected primarily by temperature, while state of cure is influenced by the level of Di-Cup and other factors.

Molecular Weight: 270.4
Active Oxygen content : 5.92%
CAS No. : 80-43-3

Appearance : White crystals
Assay : 99.0% min.

Physical properties
Bulk density: 660 kg/m3
Tapped bulk density: 705 kg/m3
Melting point: 39.5℃

Major decomposition products
Acetophenone, methqne, 2-phenylisopropanol

Packaging and transport
Standard packaging cartons size for LQ-DCP is 20 kg(4X5kg peroxide) net.
Smaller packaging size is available on request.
LQ-DCP is classified as Organic peroxide type F ,solid, Division 5.2 UN No.: 3110 PG II.

Safety and handling
Keep contains tightly closed. 
Store and handle LQ-DCP in a dry well-ventilated place away  from sources of heat or ignition and direct sunlight. 
Never weigh out in the storage room.
Avoid contact with reducing agents (e.g. amines),acids, alkalis and heavy metal compounds (e.g.accelerators,driers and metal soaps).
Please refer to the Material Safety Data Sheet(MSDS) for further information on the safe storage, use and handling of LQ-DCP.


1.Polymerization of styrene LQ-DCP can be used for the polymerization and (co)polymerization of styrene in the  temperature range of 110-165℃. 
polymerization of styrene in a mass process, LQ-DCP can be  obtained at increased polymerization rate.

2.Coagent in flame-retardant polystyrene LQ-DCP may also be used as synergistic co-agent in combination with halogen containing flame retardants to produce flame-retardant expandable polystyrene.

3.Rubber crosslink
Rubber compounds containing LQ-DCP have good processing safety with a moderate rate of cure.

Dicumyl peroxide, 99%
Bis(.alpha.,.alpha.-dimethylbenzyl) peroxide
Samperox DCP
Perkadox 96
Lupersol 500
Di-cup 40ke
Dicup 40
Dicumyl peroxide, dry
Di-Cup 40 KE
CCRIS 4616
HSDB 320
alpha,alpha-Dimethylbenzyl peroxide
EINECS 201-279-3
BRN 2056090
Peroximon DC-40
Dicumyl Peroxide 
Dicumyl peroxide, 98%
EC 201-279-3
4-06-00-03225 (Beilstein Handbook Reference)
WLN: 1X1&R&OOX1&1&R
Cumene peroxide, Diisopropylbenzene peroxide
Dicumyl Peroxide (contains ca. 60% CaCO3)
Peroxide, bis(.alpha.,.alpha.-dimethylbenzyl)
(1-Methyl-1-[(1-methyl-1-phenylethyl)peroxy]ethyl)benzene #
Peroxide,4-dichlorobenzoyl)- with phthalic acid, dibutyl ester (1:1)

Other names: 
Bis(α,α-dimethylbenzyl) peroxide; Peroxide, bis(1-methyl-1-phenylethyl); α-Cumyl peroxide; α,α'-Dicumyl peroxide; Active dicumyl peroxide; Bis(2-phenyl-2-propyl) peroxide; Cumene peroxide; Cumyl peroxide; Di-α-cumyl peroxide; Di-Cup; Di-Cup 40C; Dicumene hydroperoxide; Dicumenyl peroxide; Diisopropylbenzene peroxide; DiCup 40KE; Isopropylbenzene peroxide; Luperco 500-40C; Luperco 500-40KE; Luperox 500; Luperox 500R; Luperox 500T; Percumyl D; Percumyl D 40; Perkadox B; Perkadox BC; Perkadox SB; Peroxide, bis(α,α-dimethylbenzyl); Bis(1-methyl-1-phenylethyl) peroxide; Di-cupr; Luperco; Luperox; Varox dcp-R; Varox dcp-T; Peroximon DC-40; Di-cup 40haf; Di-Cup T; Kayacumyl D; NSC 56772; Perkadox BC 40; Perkadox BC 9; Perkadox BC 95

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