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Sodium tripolyphosphate CAS#7758-29-4

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Sodium tripolyphosphate CAS#7758-29-4

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


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


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


Stable Multiple Crystalline Forms:Available 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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