CAS 7758-29-4

Sodium tripolyphosphate

三聚磷酸钠

Na5P3O10MW 367.86 g/molHS 283531

From the buying desk

Technical grade STPP for detergents and food grade STPP for seafood and meat processing come from the same plants but carry different specifications. Food grade needs fluoride, arsenic and heavy metal limits on the COA. Not dangerous goods; ships in 25 kg or 1 tonne bags.

Import Card

Before you order sodium tripolyphosphate from China, see its register listing, the duty, anti dumping cases and a supplier check on one card, each with its source and date.

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Identifiers

Synonyms
STPP, Pentasodium triphosphate
Formula
Na5P3O10
Molecular weight
367.86 g/mol
SMILES
[O-]P(=O)([O-])OP(=O)([O-])OP(=O)([O-])[O-].[Na+].[Na+].[Na+].[Na+].[Na+]
InChIKey
HWGNBUXHKFFFIH-UHFFFAOYSA-I
HS code (6-digit)
283531

Transport and hazard profile

GHS hazard statements, Warning. H-codes, H315, H319, H335. Refer to the substance SDS Section 2 for the full classification.

US and Australian rules for Sodium tripolyphosphate

Read from the official lists by CAS 7758-29-4. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 7758-29-4 in the OEHHA list dated July 31, 2026.

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OSHA exposure limit

No entry

No entry for CAS 7758-29-4 in 29 CFR 1910.1000 Tables Z-1 to Z-3.

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Australian exposure standard

No entry

No entry for CAS 7758-29-4 in the Safe Work Australia workplace exposure standards.

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CERCLA reportable quantity

No entry

No entry for CAS 7758-29-4 in 40 CFR 302.4 as read on September 24, 2026.

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EPCRA Tier II threshold

No entry

Not on the Extremely Hazardous Substances list, so the general 10,000 lb Tier II threshold applies where an SDS is required.

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Common applications

  • · Detergent builder
  • · Seafood and meat moisture retention
  • · Ceramic dispersant
  • · Water softening

Sourcing documentation chain

Every shipment of Sodium tripolyphosphate from China should include a per-batch COA, a current SDS per GB/T 17519 on the China side and the destination jurisdiction's standard on the import side, a packing list, a bill of lading, and a certificate of origin. For Incoterms reference see FOB, CIF, and CFR.

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Free PDF: the MSDS verification template Sourzi runs against the supplier sheet for every CAS number we book out of China.