Sodium tripolyphosphate CAS#7758-29-4

Sodium tripolyphosphate CAS#7758-29-4

Excellent Chelating AbilityEffectively binds Ca²⁺ and Mg²⁺ ions, preventing scale formation and significantly improving detergent cleaning performance.


Highly Efficient Detergent BuilderWidely used as a core builder in detergents, accounting for about 50% of global consumption and enhancing overall washing efficiency.


Versatile Food-Grade AdditiveFunctions as an approved food preservative (E451), helping retain moisture and improve texture in seafood and meat products.


Stable Multiple Crystalline FormsAvailable in Phase I, Phase II, and hexahydrate forms, with Phase II offering superior industrial stability for consistent processing and storage.

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Product Description

Product Description of Sodium tripolyphosphate CAS#7758-29-4

Sodium Tripolyphosphate (STPP, Na₅P₃O₁₀) is a white crystalline phosphate. It is widely used as a high-efficiency builder in detergents, accounting for nearly half of global consumption, and also serves as an excellent water softener and approved food additive E451.


Product Application of Sodium tripolyphosphate CAS#7758-29-4 

Sodium Tripolyphosphate is widely used in water softening, heavy-duty laundry detergents, automatic dishwashing products, drilling fluid cleaning and liquid livestock feed supplements. It acts as an excellent peptizer, emulsifier and dispersant, and also serves as a stabilizer for hydrogen peroxide solutions.

In the food industry, it preserves seafood, meat and poultry by improving freshness and moisture retention. It is also used as a polyanion cross-linker in polysaccharide drug delivery systems and a sealant for leakage repair of farm ponds.



Product Information

Parameters


Melting point

622 °C

bulk density

1000kg/m3

density

2.52 g/cm3 (20℃)

vapor pressure

<0.1 hPa (20 °C)

refractive index

1.658

storage temp.

Storage temperature: no restrictions.

solubility

H2O: may be clear to slightly hazy

form

Powder/Solid

color

White

Odor

Odorless

PH

9.0-10.0 (25℃, 1% in H2O)

PH Range

9.5 - 10.3 at 1 g/l at 20 °C

Water Solubility

20 g/100 mL (20 ºC)

Sensitive

Hygroscopic

Merck

148,697

Stability:

Stable. Incompatible with strong oxidizing agents, strong acids. Hygroscopic.

InChIKey

HWGNBUXHKFFFIH-UHFFFAOYSA-I

LogP

-4.691 (est)

CAS DataBase

7758-29-4(CAS DataBase Reference)

Reference

EPA Substance Registry System

Sodium tripolyphosphate (7758-29-4)


Safety Information


Hazard CodesXi
Risk Statements36/37/38
Safety Statements26-36-24/25
WGK Germany1
RTECSYK4570000
F3
TSCAYes
HS Code28353110
Hazardous7758-29-4(Hazardous Substances Data)
Substances Data
ToxicityLD50 orally in rats: 6.50 g/kg (Smyth)


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