Sodium Tripolyphosphate 94% (STPP)

Sodium Tripolyphosphate 94% (STPP) (CAS 7758-29-4, molecular formula Na5P3O10) is a formulation raw material used by detergent, personal care and industrial cleaning manufacturers who need stable active matter and reproducible performance. China Chemicals supplies it at 94% min in pack sizes from 1 kg through to 1000 kg Bulk Bag, so laboratory trial quantities and full production volumes can be sourced from the same specification.

It is also traded as STPP, Pentasodium Triphosphate, E451. Every consignment ships with a batch-specific Certificate of Analysis and the current Safety Data Sheet, and material is stored and picked under stock rotation so you receive product well inside its shelf life.

Typical applications

Detergent builder and water softener
Moisture retention in seafood and meat processing
Ceramic and clay slurry deflocculant
Corrosion inhibition in water treatment
Leather tanning and paper processing

Technical specification

Chemical name	Sodium Tripolyphosphate 94% (STPP)
Synonyms	STPP, Pentasodium Triphosphate, E451
CAS number	7758-29-4
Molecular formula	Na5P3O10
Appearance	White free-flowing powder
Assay Na5P3O10	94.0% min
P2O5 content	56.0% min
pH (1% solution)	9.5 – 10.0
Water insolubles	0.1% max
Whiteness	85% min
Heavy metals as Pb	10 ppm max

Values above are typical and are confirmed on the Certificate of Analysis issued against each batch. Tighter specifications can be quoted where a process requires them.

Packaging and supply

Available in 1 kg, 5 kg, 25 kg Bag, 1000 kg Bulk Bag. Bulk, road tanker and export drum quantities are quoted on request, including FOB and CIF terms for international shipment. Pricing shown is per pack in USD, exclusive of freight and any applicable duties.

Handling and safety

Transport classification: Not regulated · Causes eye irritation. Store in the original closed container in a cool, well-ventilated area away from incompatible materials, and handle using appropriate personal protective equipment. Read the Safety Data Sheet in full before use — it is issued with every order and is available on request before purchase.

Supply to industry only. Products are sold for legitimate industrial, laboratory and manufacturing use. We may request end-use details and business registration before releasing an order.