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Linear Formula: Na4P2O7
CAS Number: 7722-88-5
Molecular Weight: 265.90


Sodium 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 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 it is used as a palatability enhancer.

In toothpaste and dental floss, Sodium pyrophosphatee acts as a tartar control agent, serving to remove calcium and magnesium from saliva and thus preventing them from being deposited on teeth. 
Sodium pyrophosphate is used in commercial dental rinses before brushing to aid in plaque reduction.

Sodium pyrophosphate is sometimes used in household detergents to prevent similar deposition on clothing, but due to its phosphate content it causes eutrophication of water, promoting algae growth.
Further, Sodium pyrophosphate can be used as an inorganic additive to improve the stability and electrochemical performance of redox flow batteries.

Some uses of Sodium pyrophosphate:
Buffering agent
Cleaning and safety
Products used for cleaning or safety in an occupational or industrial setting
Cleaning products and household care
Bathroom cleaner
Bathtub, tile, and toilet surface cleaners
Chelating agent    
Chelating agent
Cleaning products and household care
General household cleaning
Products that remove stains or discoloration of fabric (including color-safe bleaches) used in laundry
Home maintenance
General formulation products used for home maintenance, which do not fit into a more refined Category
Corrosion inhibitor
Personal care
Dental care
Personal care products related to dental care, which do not fit into a more refined category    
Lubricating agent
Oral care
Oral care agent
Antiseptic and dental mouthwashes and rinses    
Toothpastes and dentrifices
Pet care
All pets
Miscellaneous pet treatments (excluding pesticides and shampoos)
pH regulating agent    
ph adjuster
Poultry scald agents (must be removed by subsequent cleaning operations)
Tartar control

Sodium pyrophosphate is used as a water softener, detergent, emulsifying agent, metal cleaner, and nutritional supplement.

Industrial uses:

Adsorbents and absorbents
Corrosion inhibitors and anti-scaling agents
Plating agents and surface treating agents
Processing aids, not otherwise listed
Sequestering agent
Solids separation agents
Solvents (for cleaning and degreasing)
Surface active agents

Other uses:

Agricultural products (non-pesticidal)
Automotive care products
Building/construction materials not covered elsewhere
Cleaning and furnishing care products
Fabric, textile, and leather products not covered elsewhere
Ink, toner, and colorant products
Laundry and dishwashing products
Metal products not covered elsewhere
Non-TSCA use
Plastic and rubber products not covered elsewhere
Water treatment products

Sodium pyrophosphate is an odorless, white powder or granular solid.
Further, Sodium pyrophosphate is used in household and industrial cleaning compounds, as a water softener, metal cleaner and food additive, and for oil well drilling. 

Chemical formula of Sodium pyrophosphate is Na4P2O7 * 10 H2O.
The aqueous solution of Sodium pyrophosphate is alkaline and easily soluble in water.
The pH of the 1% solution of Sodium pyrophosphate ranges from 10 to 11.

Production and Reactions of Sodium pyrophosphate:

Sodium pyrophosphate is a sodium salt and is derived from its carbonate and phosphates, such as tkpp.

Usage areas of Sodium pyrophosphate:


As a source of phosphorus, Sodium pyrophosphate is an emulsifier which is used for the binding of soybean particles and protein water connection.
Further, Sodium pyrophosphate is also used as a thickener in ready puddings.


Sodium pyrophosphate is used as an inorganic stabilizer in textile.


As a water softener for detergents, Sodium pyrophosphate can be used as an emulsifier to suspend the oils and to prevent their sedimentation on the laundry in the wash.


Sodium pyrophosphate is used as ph value adjuster in chemical industry.

Tooth paste:

Since Sodium pyrophosphate removes Ca and Mg ions from saliva, Sodium pyrophosphate does not stay on the teeth so Sodium pyrophosphate is used as buffer in toothpastes.

Sodium pyrophosphate is used in the following products:

pH regulators and water treatment products
Water softeners
Cosmetics and personal care products
Coating products and fillers
Modelling clay.

Release to the environment of Sodium pyrophosphate 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 Sodium 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.

Sodium pyrophosphate can be used as:

Buffering agent
Emulsifying agent


Sodium pyrophosphate is an inorganic compound with the formula Na4P2O7.
As a salt, Sodium pyrophosphate is a white, water-soluble solid.
Sodium pyrophosphate is composed of pyrophosphate anion and sodium ions.

Toxicity is approximately twice that of table salt when ingested orally.

Sodium 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

Sodium pyrophosphate is a non-toxic and biocompatible compound used as an electroactive media for exfoliation of the surface coating.
Furthermore, Sodium pyrophosphate is also be used as an additive in the food industry.

Sodium pyrophosphate appears as odorless, white powder or granules. mp: 995 °C.

Some properties of Sodium pyrophosphate:

Density: 2.53 g/cm3
Solubility in water: 3.16 g/100 mL (cold water); 40.26 g/100 mL boiling water.

Sodium pyrophosphate can be used as a wool de-fatting agent, in bleaching operations, as a food additive.
Beside that,Sodium pyrophosphate (Na4P2O7*10H2O) occurs as colorless transparent crystals.
Sodium pyrophosphate loses its water when heated to 93.8 °C.

Sodium pyrophosphate is an inorganic sodium salt comprised of a diphosphate(4-) anion and four sodium(1+) cations.
More commonly known as tetrasodium pyrophosphate, Sodium pyrophosphate finds much use in the food industry as an emulsifier and in dental hygiene as a calcium-chelating salt.
Sodium pyrophosphate has a role as a food emulsifier, a chelator and a food thickening agent.

Sodium pyrophosphate contains a diphosphate(4-).

Sodium pyrophosphate also called, disodium pyrophosphate or DSPP (sc-251047) is used in the Further, Sodium pyrophosphate has been used as a chelating agent in antimicrobial studies. Sodium Sodium pyrophosphate has shown to be useful in the preparation of an EDTA-sodium pyrophosphate extraction buffer for microcystin analysis of soil samples.


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
logP: -1.4    
pKa (Strongest Acidic): 1.7
Physiological Charge: -3
Hydrogen Acceptor Count: 6
Hydrogen Donor Count: 0
Polar Surface Area: 135.61 Å2
Rotatable Bond Count: 2
Refractivity: 21.04 m3·mol-1
Polarizability: 9.05 Å3
Number of Rings: 0
Bioavailability: 1
Rule of Five: Yes
Ghose Filter: No
Veber's Rule: No
MDDR-like Rule: No


Eye Contact:

Immediately flush with large amounts of water for at least 15 minutes, lifting upper and lower lids.
Remove contact lenses, if worn, while rinsing.

Skin Contact:

Quickly remove contaminated clothing. Immediately wash contaminated skin with large amounts of water.


Remove the person from exposure.
Begin rescue breathing (using universal precautions) if breathing has stopped and CPR if heart action has stopped.
Transfer promptly to a medical facility. 


Sodium pyrophosphate
Tetrasodium diphosphate
Sodium diphosphate
Diphosphoric acid, tetrasodium salt
Victor TSPP
Caswell No. 847
Natrium pyrophosphat
Pyrophosphoric acid tetrasodium salt
Sodium pyrophosphate [USAN]
Sodium diphosphate, anhydrous
Natrium pyrophosphat [German]
Sodium phosphate (Na4P2O7)
Sodium pyrophosphate tetrabasic
HSDB 854
Sodium pyrophosphate (USAN)
Sodium pyrophosphate, tetrabasic
Tetranatriumpyrophosphat [German]
EINECS 231-767-1
NSC 56751
EPA Pesticide Chemical Code 076405
Sodium diphosphate tetrabasic
tetrasodium phosphonato phosphate
Tetrasodium pyrophosphate, anhydride
tetra sodium pyrophosphate
EC 231-767-1
Diphosphoric acid sodium salt
Sodium diphosphate (Na4(P2O7))
Tetrasodium pyrophosphate Anhydrous
Diphosphoric acid, sodium salt (1:4)

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