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)


Factory Showcase

拼图_美图设计室-(1)

Quality Control Lab

实验室

Shipping And Transportation

拼图_美图设计室

FAQ

Q1: Is Huafeng Chemical a manufacturer or a trader?
A: We are a professional service provider specializing in chemical foreign trade. Rather than being limited to the products of a single factory, we leverage the chemical industry cluster in Shandong Province to integrate production resources from multiple high-quality manufacturers. This allows us to offer a wide range of sourcing options—covering various product categories and origins—instead of simply pushing a single product. Furthermore, our core competitiveness lies in our professional foreign trade services (covering documentation, logistics, and regulatory compliance), ensuring a smooth and worry-free procurement process for you.


Q2: How is the security of my transaction guaranteed when working with Huafeng Chemical?
A: We strictly adhere to international trade rules (Incoterms® 2020) and accept various payment methods, such as Letters of Credit (L/C) and Telegraphic Transfers (T/T). For new clients, we support small-batch trial orders and can clearly define arbitration clauses and applicable laws within the contract. Additionally, we maintain a robust risk management system to help you mitigate common trade risks, such as exchange rate fluctuations, shipping delays, and document discrepancies.


Q3: Do you have experience serving clients in Russian-speaking regions?
A: Yes. We place great importance on the Russian-speaking market; our team includes Russian-speaking business professionals who are well-versed in the import regulations of Russia and the Eurasian Economic Union (EAEU). We understand the importance of EAC certification to clients in these regions and can assist with related compliance inquiries. We have established connections with chemical traders across various CIS countries and have gained valuable experience in specialized packaging and temperature-controlled shipping designed to withstand harsh local winter conditions.


Q4: How do you guarantee product quality?
A: We implement a strict supplier qualification and periodic audit system. A Certificate of Analysis (COA)—issued by the original manufacturer—is provided with every shipment. We also welcome pre-shipment inspections conducted by internationally recognized third-party agencies such as SGS, BV, or ITS. Should the test results fail to meet the standards specified in the contract, you have the right to reject the goods or request a replacement.

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