Tetrasodium Pyrophosphate

Synonym(s)

: Sodium diphosphate, sodium pyrophosphate, TSPP

Mol. Formula

: Na4P2O7

EC / List no.

: 231-767-1

CAS no.

: 7722-88-5

Molecular weight

: 265,9

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

Application

» This substance 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, modeling clay.
» Release of this substance to the environment may occur from industrial use: in the formulation of mixtures, in the manufacture of articles and in processing aids on industrial sites.
» Used in machine wash liquids/detergents, automotive care products, paints, coatings or adhesives, fragrances and air fresheners.

Product Specifications

Physical and Chemical Properties
» Tetrasodium pyrophosphate appears as an odorless, white powder or granules.
» Odorless.

Properties

Characteristics	Unit	Value	Condition
Melting point	°C	880
Density	g/ cm³	2.62	20 °C
Solubility	g/ L	58.5	20 °C, soluble with water
Vapor pressure	Pa	0	20 °C
pH		9.8- 10.8	1% solution
Refractive index		1.450