Sodium triphosphate

Not to be confused with Trisodium phosphate.
Sodium triphosphate
Names
IUPAC name
Pentasodium triphosphate
Other names
sodium tripolyphosphate, polygon, STPP
Identifiers
ECHA InfoCard 100.028.944 Edit this at Wikidata
E number E451 (thickeners, ...)
RTECS number
  • YK4570000
UNII
Properties
Na5P3O10
Molar mass 367.864 g/mol
Appearance white powder
Density 2.52 g/cm3
Melting point 622 °C (1,152 °F; 895 K)
14.5 g/100 mL (25 °C)
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Flash point Non-flammable
Safety data sheet (SDS) ICSC 1469
Related compounds
Other anions
 Trisodium phosphate
Tetrasodium pyrophosphate
Sodium hexametaphosphate
Other cations
 Pentapotassium triphosphate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Sodium triphosphate (STP), also sodium tripolyphosphate (STPP), or tripolyphosphate (TPP),[1]) is an inorganic compound with formula Na5P3O10. It is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid. It is produced on a large scale as a component of many domestic and industrial products, especially detergents. Environmental problems associated with eutrophication are attributed to its widespread use.[2]

  1. ^ Complexing agents, Environmental and Health Assessment of Substances in Household Detergents and Cosmetic Detergent Products, Danish Environmental Protection Agency Archived 2017-08-24 at the Wayback Machine, Accessed 2008-07-15
  2. ^ Cite error: The named reference GE was invoked but never defined (see the help page).