TETRASODIUM PYROPHOSPHATE

Tetrasodium pyrophosphate = sodium pyrophosphate = tetrasodium phosphate = TSPP

CAS number : 7722-88-5
EC number : 231-767-1
Chemical formula: Na4O7P2
Molar mass: 265.900 g·mol−1

Tetrasodium pyrophosphate, also called sodium pyrophosphate, tetrasodium phosphate or TSPP, is an inorganic compound with the formula Na4P2O7. 
As a salt, Tetrasodium pyrophosphate is a white, water-soluble solid. 
Tetrasodium pyrophosphate is composed of pyrophosphate anion and sodium ions. 
Also known is the decahydrate Na4P2O7 · 10(H2O).
Tetrasodium Pyrophosphate or TSPP is a solid white inorganic compound that is water soluble. 
TSPP is a salt composed of pyrophosphate anions and sodium ions. 
Tetrasodium Pyrophosphate or TSPP is aproximately twice the toxicity level of common table salt. 
Tetrasodium Pyrophosphate or TSPP is most commonly produced by the reaction of  phosphoric acid with sodium carbonate to form disodium phosphate, which is then heated to 450 °C to form tetrasodium pyrophosphate. 
Tetrasodium Pyrophosphate or TSPP is primarily used as a food additive but also has a wide range of applications such as an emulsifier, thickening agent, buffering agent and dispersing agent.

Use
Tetrasodium pyrophosphate is used as a buffering agent, an emulsifier, a dispersing agent, and a thickening agent, and is often used as a food additive. 
Common foods containing tetrasodium pyrophosphate include chicken nuggets, marshmallows, pudding, crab meat, imitation crab, canned tuna, and soy-based meat alternatives and cat foods and cat treats where Tetrasodium pyrophosphate is used as a palatability enhancer.
In toothpaste and dental floss, tetrasodium pyrophosphate acts as a tartar control agent, serving to remove calcium and magnesium from saliva and thus preventing them from being deposited on teeth. 
Tetrasodium pyrophosphate is used in commercial dental rinses before brushing to aid in plaque reduction.
Tetrasodium pyrophosphate is sometimes used in household detergents to prevent similar deposition on clothing, but due to its phosphate content Tetrasodium pyrophosphate causes eutrophication of water, promoting algae growth.
Tetrasodium pyrophosphate is used as a buffering agent, an emulsifier, a dispersing agent, and a thickening agent, and is often used as a food additive. 
Tetrasodium pyrophosphate is widely used as an emulsifying salt (ES) in process cheese. 
Common foods containing sodium pyrophosphate include chicken nuggets, marshmallows, pudding, crab meat, imitation crab, canned tuna, and soy-based meat alternatives and cat foods and cat treats where Tetrasodium pyrophosphate is used as a palatability enhancer. 
Tetrasodium pyrophosphate is the active ingredient in Bakewell, the substitute for baking powder's acid component marketed during shortages in World War II. 
Tetrasodium pyrophosphate is also used in some common baking powders.

Uses
Tetrasodium Pyrophosphate is a coagulant, emulsifier, and sequestrant that is mildly alkaline, with a ph of 10. 
Tetrasodium pyrophosphate is moderately soluble in water, with a solubility of 0.8 g/100 ml at 25°c. 
Tetrasodium pyrophosphate is used as a coagulant in noncooked instant puddings to provide thicken- ing. 
Tetrasodium pyrophosphate functions in cheese to reduce the meltability and fat separa- tion. 
Tetrasodium pyrophosphate is used as a dispersant in malted milk and chocolate drink powders. 
Tetrasodium pyrophosphate prevents crystal formation in tuna. 
Tetrasodium pyrophosphate is also termed sodium pyrophosphate, tetrasodium diphosphate, and tspp.

Pharmaceutic aid.
Tetrasodium pyrophosphate (Na4P2O7) is a non-toxic and biocompatible compound used as an electroactive media for exfoliation of the surface coating. 
Tetrasodium pyrophosphate is also be used as an additive in the food industry.
Na4P2O7 can be used as an inorganic additive to improve the stability and electrochemical performance of redox flow batteries.
As a water softener; as a metal cleaner; as a dispersing and emulsifying agent.

Tetra sodium pyrophosphate, also known as Sodium Pyro phosphate, Tetra sodium phosphate or TSPP, is achemical compound composed of pyrophosphate and sodium ions.

Application of Tetrasodium pyrophosphate:
• Tetra Sodium pyrophosphate is used as a buffering agent, also as an emulsifier and as a dispersing agent
• Tetra Sodium Pyrophosphate also used as a thickening agent and also often used as a food additive
• TSPP is used in common baking powders and also in toothpaste and dental floss as a tartar control
• Sometimes TSPP is also used in household detergents

Preparation of Tetrasodium pyrophosphate
Tetrasodium pyrophosphate is formed when pure disodium hydrogen orthophosphate is heated to 500℃ for 5 hours. 
The product will contain better than 98 per cent Na4P2O7. 
Crystalline masses large enough for optical measurements are produced by heating in platinum to above the melting point of the tetrasodium pyrophosphate, 800°, and cooling slowly. 
Higher temperatures or longer heating times do not change the tetrasodium pyrophosphate, as this is the final product in the dehydration of disodium hydrogen orthophosphate.

General Description
Odorless, white powder or granules. 
Mp: 995°C. 
Density: 2.53 g cm-3. 
Solubility in water: 3.16 g / 100 mL (cold water); 40.26 g / 100 mL boiling water. 
Used as a wool de-fatting agent, in bleaching operations, as a food additive. 
The related substance Tetrasodium pyrophosphate decahydrate (Na4P2O7 0H2O) occurs as colorless transparent crystals. 
Loses its water when heated to 93.8°C.

Tetrasodium Pyrophosphate
Chemical formula: Na4P2O7
Mol.Wt.: 265.95
P2O5: 53.0% minimum
Na2O: 46.5% minimum
pH of 1% soln.: 10.0-10.5
Water in solubles: 0.2% maximum
Appearance: a colorless, transparent crystals or white powder or granules.
Tetrasodium pyrophosphate is odorless; slightly soluble in water; insoluble in alcohol and ammonia.

USES:
STPP is used as a cleaning compound; oil well drilling; water treatment, cheese emulsification; as a general sequestering agent, to remove rust stains; as am ingredient of one fluid ink eradicators, in electrodeposition of metals.
Tetrasodium pyrophosphate is used in textile dyeing; scouring of wool; buffer; food additive; detergent builder; water softener and dispersant.

Synonyms
Sodium pyrophosphate,
TSPP,
tetrasodium diphosphate

Description
Colorless transparent crystals or white powder.

Uses
Tetrasodium pyrophosphate is used as a pH buffer (a substance which maintains a particular acidity level), and as a dough conditioner in soy-based "meat alternatives". 
Tetrasodium pyrophosphate promotes binding of proteins to water, binding the soy particles together, and is used for the same purpose in chicken nuggets and imitation crab and lobster products.
Tetrasodium pyrophosphate is an emulsifier, and a source of phosphorus as a nutrient.
Tetrasodium pyrophosphate is used in toothpastes, as a buffer, an emulsifier, and a detergent aid. 
Tetrasodium pyrophosphate is the "tartar control" agent. 
Tetrasodium pyrophosphate removes calcium and magnesium from the saliva, so they can't deposit on the teeth.
Tetrasodium pyrophosphate is a thickening agent in instant puddings.
Tetrasodium pyrophosphate is a water softener in detergents, and an emulsifier to suspend oils and prevent them from redepositing on clothing in the wash. 
As a water softener, Tetrasodium pyrophosphate combines with magnesium to sequester Tetrasodium pyrophosphate from the detergent, without precipitating Tetrasodium pyrophosphate onto the clothing.
As a detergent additive, Tetrasodium pyrophosphate can also "reactivate" detergents or soaps that have combined with calcium to make an insoluble scum. 
The TSPP sequesters the calcium, replacing Tetrasodium pyrophosphate with sodium, which reactivates the detergent or soap, and yet keeps the calcium from precipitating out of solution.
Because phosphates cause "eutrophication" of water (algae grows because of the fertilizing power of phosphates), Tetrasodium pyrophosphate is seldom used as a detergent additive, except in toothpastes.

Reactivity Profile
Tetrasodium pyrophosphate is basic. 
Reacts exothermically with acids. 
Incompatible with strong oxidizing agents. 
Decomposes in ethyl alcohol.

Production
Tetrasodium pyrophosphate is produced by the reaction of furnace-grade phosphoric acid with sodium carbonate to form disodium phosphate, which is then heated to 450 °C to form tetrasodium pyrophosphate:
2 Na2HPO4 → Na4P2O7 + H2O

IUPAC name: Tetrasodium diphosphate

Other names: Pyrophosphate, Sodium pyrophosphate, Tetrasodium pyrophosphate (anhydrous), TSPP

General description
Sodium pyrophosphate tetrabasic (Na4P2O7) is a non-toxic and biocompatible compound used as an electroactive media for exfoliation of the surface coating. 
Tetrasodium pyrophosphate is also be used as an additive in the food industry.

Application
Na4P2O7 can be used as an inorganic additive to improve the stability and electrochemical performance of redox flow batteries.

Tetrasodium pyrophosphate (TSPP), also called tetrasodium disphosphate or sodium pyrophosphate, is a synthetic ingredient that can be used as an acid regulator, sequestrant, protein modifier, coagulant, and a dispersing agent in food with the European food additive number E450(iii). 
Tetrasodium pyrophosphate is gluten free and vegan.

How is TSPP made? 
TSPP can be produced by the neutralization of phosphoric acid with sodium hydroxide with mol proportions of 2:1.

Food grade TSPP exists as two forms, and follows the corresponding chemical formula: 
TSPP Anhydrous: Na4P2O7
TSPP Decahydrate: Na4P2O7 · 10H2O

An inorganic sodium salt comprised of a diphosphate(4−) anion and four sodium(1+) cations. 
More commonly known as tetrasodium pyrophosphate, Tetrasodium pyrophosphate finds much use in the food industry as an emulsifier and in dental hygiene as a calcium-chelating salt.

Tetrasodium pyrophosphate is bad for you, like most additives. 
The additive has zero nutritional benefits and comes with many alarming side effects, especially when consumed in large quantities.
Tetrasodium pyrophosphate is a chemical compound formed by the reaction of phosphoric acid with sodium carbonate to create disodium phosphate which is then further heated to obtain the final product.
Let’s think about phosphoric acid for a minute. 
Aside from Tetrasodium pyrophosphates use in making food additives, Tetrasodium pyrophosphate is otherwise mainly used to remove rust from metals. 
Really? That doesn’t seem safe at all to be eating; can you imagine what Tetrasodium pyrophosphate would do to your insides?
In food, this additive is used as an emulsifier, thickener, dispersing agent, and as a pH buffering agent. 
Tetrasodium pyrophosphate is typically found in highly processed foods like chicken nuggets, imitation crab, marshmallows, canned tuna, and soy-based meat alternatives – foods you shouldn’t eat much of anyway – if any at all. 
The purpose of this ingredient in these foods Tetrasodium pyrophosphate to bind protein and water to keep all of the ground-up substances together.

CAS Number: 7722-88-5  
13472-36-1 (decahydrate) 
ECHA InfoCard: 100.028.880  
EC Number: 231-767-1
E number: E450(iii) (thickeners, ...)
PubChem CID: 24403
RTECS number: UX7350000
UNII: 
O352864B8Z  
IY3DKB96QW (decahydrate)
CompTox Dashboard (EPA): DTXSID9042465

Applications
Sodium pyrophosphate is used in water softener, detergent, emulsifying agent, metal cleaner and nutritional supplement.
Tetrasodium pyrophosphate acts as a buffering agent, thickening agent and dispersing agent. 
Tetrasodium pyrophosphate also acts as a tartar control agent in toothpaste and dental floss. 
In addition, Tetrasodium pyrophosphate is used as a chelating agent in antimicrobial studies. 
Tetrasodium pyrophosphate is also used as a food additive in common foods such as chicken nuggets, crab meat and canned tuna.

Notes
Hygroscopic. 
Incompatible withstrong oxidizing agents and strong acids.

Specification
Other names:    
Tetrasodium disphosphate
Tetrasodium phosphate
Sodium pyrophosphate
CAS number: 7722-88-5
Appearance: white powder or granular powder
Solubility: Soluble in water, insoluble in ethanol

What are the uses of TSPP?
With the properties of chelating metal ions, increasing protein water holding capacity, PH buffering, stabilization, emulsification, casein thickening and ect, tetrasodium pyrophosphate is widely used in food to improve the gel strength and the tenderness of meat products/analogs. 
Also, Tetrasodium pyrophosphate is used with other phosphates (e.g. sodium hexametaphosphate, sodium acid pyrophosphate) in seafood to increase the water retention. 

Food
Food grade TSPP is mainly used in following two functions:
-A buffering agent: with the PH value from 9.8 to 10.8 (1% solution), TSPP can be used as an alkaline to adjust pH in processed food, pudding and etc.
-A calcium sequestrant: TSPP can remove naturally occurring calcium ions from proteins and crosslink with proteins, which results in accelerating protein gelation, improving texture (mouthfeel) and reducing cooking loss in meat analog production (e.g. soy protein).

Following food list may contain TSPP:
-Meat analogs, such as soy or wheat based food, with the appearance, flavor and mouth-feel the same with meat but not made from meat. 
-Marshmallows
-Pudding
-Cheese
-Ice cream
-Milk protein products
-Tuna
-Toothpaste

Orally the main purpose of TSPP is to prevent the formation of calculus by reducing the deposition of calcium and magnesium on teeth. 
Thus Tetrasodium pyrophosphate is commonly used as the anticalculus component of many tartar-control toothpastes and mouth rinse. 
Disodium pyrophosphate also has the same function.
The top toothpaste manufacturer, Crest also uses Tetrasodium pyrophosphate as the anti-tartar ingredient in its whitening expressions.

Sodium pyrophosphate
TETRASODIUM PYROPHOSPHATE
7722-88-5
TSPP
Sodium diphosphate
Phosphotex
Tetrasodium diphosphate
Diphosphoric acid, tetrasodium salt
Victor TSPP
Caswell No. 847
Natrium pyrophosphat

ApplicationsSodium Pyrophosphate has been shown to enhance the rate of pyrophosphate hydrolysis by nonenzymatic catlysis and by inorganic pyrophoshatase. 
Pyrophosphoric Acid can be used for the preparation of vanadyl pyrophosphato methoxide cluster anion. 
Pyrophosphoric Acid is used in anion binding of inorganic phosphates due to is ability to form complexes.

Pyrophosphoric acid tetrasodium salt
Sodium pyrophosphate [USAN]
Sodium diphosphate, anhydrous
Natrium pyrophosphat [German]
Sodium phosphate (Na4P2O7)
Sodium pyrophosphate tetrabasic
HSDB 854
MFCD00003513
UNII-O352864B8Z
Na4P2O7
CHEBI:71240
O352864B8Z

Tetrasodium pyrophosphate appears as odorless, white powder or granules. mp: 995°C. 
Density: 2.53 g/cm3. Solubility in water: 3.16 g/100 mL (cold water); 40.26 g/100 mL boiling water. 
Used as a wool de-fatting agent, in bleaching operations, as a food additive. 
The related substance tetrasodium pyrophosphate decahydrate (Na4P2O7*10H2O) occurs as colorless transparent crystals. 
Loses Tetrasodium pyrophosphates water when heated to 93.8°C.

Food additive. Burffering agent in foods and puddings. 
Sequestering agent, water treatment
INCI Name: Tetrasodium Pyrophosphate
CAS Number(s): 7722-88-5

Where is sodium diphosphate found?
Sodium diphosphate is used as a food additive and thickening agent. 
Tetrasodium pyrophosphate is found in chicken nuggets, marshmallows, pudding, crab meat, imitation crab, canned tuna, and soy-based meat alternatives, toothpaste, dental floss, and household detergents.

How can you avoid contact with sodium diphosphate?
Avoid products that list any of the following names in the ingredients:
• Anhydrous tetrasodium pyrophosphate
• Caswell No. 847
• Diphosphoric acid, tetrasodium salt
• EINECS 231-767-1
• EPA Pesticide Chemical Code 076405
• HSDB 854
• NSC 56751
• Natrium pyrophosphate
• Natrium pyrophosphat [German]
• Phosphotex
• Pyrophosphoric acid tetrasodium salt
• Sodium diphosphate (Na4P2O7)
• Sodium diphosphate, anhydrous
• Sodium phosphate (Na4P2O7)
• Sodium pyrophosphate (Na4P2O7)
• Sodium pyrophosphate, tetrabasic
• TSPP
• Tetranatriumpyrophosphat
• Tetranatriumpyrophosphat [German]
• Tetrasodium diphosphate
• Tetrasodium pyrophosphate
• Tetrasodium pyrophosphate, anhydrous
• Victor TSPP

What are some products that may contain sodium diphosphate?
Hair Dyes
Household Products
Toothpastes

Additional resources and links for sodium diphosphate.
To submit resources or links, please fill out the submission form at the top of this page.

Diphosphoric acid, sodium salt (1:4)
Sodium pyrophosphate (USAN)
Sodium pyrophosphate, tetrabasic
Tetranatriumpyrophosphat [German]
EINECS 231-767-1
NSC 56751
EPA Pesticide Chemical Code 076405
tetrasodium phosphonato phosphate
Tetrasodium pyrophosphate, anhydride
tetra sodium pyrophosphate
EC 231-767-1
DSSTox_CID_22465
DSSTox_RID_80032
4Na.O7P2

Description
Sodium pyrophosphate, also called Tetrasodium pyrophosphate or TSPP is used in the laboratory as a buffering agent. 
Tetrasodium pyrophosphate has been shown to be useful in the preparation of an EDTA-sodium pyrophosphate extraction buffer for microcystin analysis of soil samples. 
Tetrasodium pyrophosphate is an odorless, white powder or granules. 
Tetrasodium pyrophosphate is used in water softener, buffering agent, thickening agent, dispersing agent, wool de-fatting agent, metal cleaner, soap and synthetic detergent builder, general sequestering agent, in electrodeposition of metals. 
Tetrasodium pyrophosphate also acts as a tartar control agent in toothpaste and dental floss. 
In addition, Tetrasodium pyrophosphate is used as a chelating agent in antimicrobial studies. 
Tetrasodium pyrophosphate is also used as a food additive in common foods such as chicken nuggets, crab meat and canned tuna.

Chemical Properties
Tetrasodium pyrophosphate is a white crystalline powder or colourless crystals with the formula Na4P2O7. 
Tetrasodium pyrophosphate contains the pyrophosphate ion and sodium cation. 
Toxicity is approximately twice that of table salt when ingested orally. 
There is also a hydrated form, Na4P2O7.10H2O.

Compound Formula: Na4O7P2
Molecular Weight: 265.9
Appearance: Colorless to White Powder
Melting Point: 80 °C
Boiling Point: 93.8 °C
Density: 2.53 g/cm3
Solubility in H2O: N/A
Exact Mass: 265.871003
Monoisotopic Mass: 265.871003

Sodium Pyrophosphate Tetrabasic is generally immediately available in most volumes. 
High purity, submicron and nanopowder forms may be considered. 

Tetrasodium Pyrophosphate, Anhydrous (TSPP) Granular & Powder is an anhydrous, white, crystalline material in powder form. 
Tetrasodium pyrophosphate is used as a dispersing agent, sequestrant, buffering agent, protein modifier, and coagulant.
TSPP is used to modify the proteins enabling them to retain moisture during storage, thawing, and cooking. 
TSPP also increases shelf life of the product by sequestering multivalent cations responsible for lipid oxidation and rancidity development. 
TSPP is added to improve whipping efficiency and improve foam stability. 
Granular TSPP helps to buffer the pH of the processed cheese and interacts with milk proteins to promote emulsification. 
Tetrasodium pyrophosphate sequesters iron in potato products to prevent after-cooking blackening and to stabilize color. 
To maintain fat dispersion in an ice cream/dessert mix, TSPP may be added so "churning" will not form lumps of butter during freezing.

DSSTox_GSID_42465
Diphosphoric acid sodium salt
Sodium pyrophosphate anhydrous
tetrasodium;phosphonato phosphate
DTXSID9042465
Tetrasodium pyrophosphate Anhydrous
CS-B1771
Tox21_110033

Tetrasodium pyrophosphate, also called sodium pyrophosphate, tetrasodium phosphate or TSPP, is an inorganic compound with the formula Na4P2O7. 
As a salt, Tetrasodium pyrophosphate is a white, water-soluble solid. 
Tetrasodium pyrophosphate is composed of pyrophosphate anion and sodium ions. 
Toxicity is approximately twice that of table salt when ingested orally.
Also known is the decahydrate Na4P2O7 · 10(H2O).

Mainly used in meat and seafood processing as a water retention agent, a stabilizer for natural pigments and to prevent fat corruption. 
Tetrasodium pyrophosphate can also be used as a PH modifier, an emulsifier, a quality improver agent in dough and as a nutrient supplement.

AKOS015914004
AKOS024418778
NCGC00013687-01
CAS-7722-88-5
FT-0689073
X3333
D05873
Q418504
1004291-85-3

About this substance
Helpful information
Tetrasodium pyrophosphate is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 1 000 to < 10 000 tonnes per annum.
Tetrasodium pyrophosphate is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.

Consumer Uses
Tetrasodium pyrophosphate is used in the following products: pH regulators and water treatment products, water softeners, cosmetics and personal care products, coating products and fillers, putties, plasters, modelling clay. Release to the environment of this substance can occur from industrial use: formulation of mixtures, in the production of articles and in processing aids at industrial sites. Other release to the environment of this substance is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.

Article service life
Release to the environment of Tetrasodium pyrophosphate can occur from industrial use: industrial abrasion processing with low release rate (e.g. cutting of textile, cutting, machining or grinding of metal).
Other release to the environment of Tetrasodium pyrophosphate is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment).
Tetrasodium pyrophosphate can be found in products with material based on: stone, plaster, cement, glass or ceramic (e.g. dishes, pots/pans, food storage containers, construction and isolation material), fabrics, textiles and apparel (e.g. clothing, mattress, curtains or carpets, textile toys), leather (e.g. gloves, shoes, purses, furniture), paper (e.g. tissues, feminine hygiene products, nappies, books, magazines, wallpaper), wood (e.g. floors, furniture, toys) and plastic (e.g. food packaging and storage, toys, mobile phones).

Widespread uses by professional workers
Tetrasodium pyrophosphate is used in the following products: pH regulators and water treatment products, water softeners and cosmetics and personal care products.
Tetrasodium pyrophosphate is used in the following areas: formulation of mixtures and/or re-packaging, agriculture, forestry and fishing, building & construction work and municipal supply (e.g. electricity, steam, gas, water) and sewage treatment.
Tetrasodium pyrophosphate is used for the manufacture of: metals, fabricated metal products, chemicals, pulp, paper and paper products, mineral products (e.g. plasters, cement) and machinery and vehicles.
Release to the environment of Tetrasodium pyrophosphate can occur from industrial use: formulation of mixtures and in the production of articles.
Other release to the environment of Tetrasodium pyrophosphate is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.

Formulation or re-packing
Tetrasodium pyrophosphate is used in the following products: pH regulators and water treatment products, water softeners and polymers.
Release to the environment of Tetrasodium pyrophosphate can occur from industrial use: formulation of mixtures, in the production of articles, in processing aids at industrial sites and as processing aid.
Other release to the environment of Tetrasodium pyrophosphate is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.

Uses at industrial sites
Tetrasodium pyrophosphate is used in the following products: pH regulators and water treatment products, water softeners and polymers.
Tetrasodium pyrophosphate is used in the following areas: formulation of mixtures and/or re-packaging, mining and municipal supply (e.g. electricity, steam, gas, water) and sewage treatment.
Tetrasodium pyrophosphate is used for the manufacture of: chemicals, metals, fabricated metal products, machinery and vehicles and textile, leather or fur.
Release to the environment of Tetrasodium pyrophosphate can occur from industrial use: in processing aids at industrial sites, formulation of mixtures, in the production of articles and as processing aid.
Other release to the environment of Tetrasodium pyrophosphate is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners) and outdoor use.

Manufacture
Release to the environment of Tetrasodium pyrophosphate can occur from industrial use: manufacturing of the substance, formulation of mixtures, formulation in materials, in processing aids at industrial sites, in the production of articles and as an intermediate step in further manufacturing of another substance (use of intermediates).

Tetrasodium Pyrophosphate also called TSPP is used as a buffering agent, emulsifier, dispersing agent, and a thickening agent in chicken nuggets, marshmallows, pudding, crab meat, imitation crab, canned tuna, and soy-based meat alternatives|and cat foods and cat treats|in dental hygiene products such as toothpaste, dental floss, commercial dental rinses and household detergents. CAS # (7722-88-5)

Synonym(s): Tetrasodium pyrophosphate, Sodium diphosphate tetrabasic
Linear Formula: Na4P2O7
CAS Number: 7722-88-5
Molecular Weight: 265.90
EC Number: 231-767-1
MDL number: MFCD00003513
PubChem Substance ID: 57654562
NACRES: NA.23

Primarily used as a food additive tetrasodium pyrophosphate (TSPP) is a salt composed of pyrophosphate and sodium ions that possesses approximately twice the toxicity of table salt when ingested orally. 
In general use, TSPP is used as an emulsifier, thickening agent, buffering agent, and a dispersing agent. 
Chicken nuggets, crab meat, marshmallows, imitation crab, pudding, canned tuna, and numerous soy-based meat alternatives use TSPP, as do cat food and cat treat manufacturers to make their products more palatable to felines. 
This substance also functions as a tartar control agent in both dental floss and toothpaste by removing the calcium and magnesium found in saliva to prevent them from forming deposits on teeth. 
Most TSPP is synthesized via the reaction of furnace-grade phosphoric acid and sodium carbonate in order to produce disodium phosphate, which is then heated to a temperature of 450 degrees C to form TSPP. Another common method of synthesis is the molecular dehydration of dibasic sodium at 500 degrees C.

Formula: Na4O7P2
Molecular mass: 266
Melting point: 988°C
Relative density (water = 1): 2.5  

Other Known Names: TSPP, sodium pyrophosphate, tetrasodium phosphate, tetrasodium diphosphate
Molecular Formula: Na4O7P2
Applications: buffering agent, emulsifier, dispersing agent, thickening agent, tartar control agent in toothpaste

Inci name: Tetrasodium pyrophosphate
French name: Tetrasodium Pyrophosphate
CAS number.: 7722-88-5
EC number.: 231-767-1
Other appellations: Tetrasodium pyrophosphate

Chemical formula: Na4O7P2
Molar mass: 265.900 g·mol−1
Appearance: Colorless or white crystals
Odor: odorless
Density: 2.534 g/cm3
Melting point: 
988 °C (1,810 °F; 1,261 K) (anhydrous)
79.5 °C (decahydrate)
Boiling point: decomposes
Solubility in water:
2.61 g/100 mL (0 °C)
6.7 g/100 mL (25 °C)
42.2 g/100 mL (100 °C)
Solubility: insoluble in ammonia, alcohol
Refractive index (nD): 1.425

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