Description
Sodium Tripolyphosphate 94% (STPP)
We are a bulk STPP supplier of 94% sodium tripolyphosphate. 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.
What Is Sodium Tripolyphosphate (STPP)?
Sodium tripolyphosphate (STPP) is a versatile inorganic salt supplied here at 94% purity as a white powder. It is a multi-functional detergent builder and a food additive: in cleaning products it softens water, boosts detergency and keeps dirt suspended, and in food it acts as a moisture retainer, emulsifier and texture improver. As an STPP supplier we provide a 94% grade used across detergents, food processing, water treatment and ceramics.
How STPP Works in Detergents
STPP is the classic detergent “builder”. It sequesters the calcium and magnesium ions that cause water hardness, so the surfactants can work efficiently, and it helps keep loosened dirt dispersed in the wash water so it does not redeposit on fabric. This boosts cleaning performance, especially in hard water, which is why it was for decades the standard builder in laundry powders.
Applications
STPP is used in laundry and dishwashing detergents and other cleaners as a builder, in food processing (food grade only) as a moisture retainer and texture aid in seafood, meat and poultry, in ceramics as a deflocculant to control slip viscosity, in water treatment, and in various industrial applications. It is often combined with surfactants such as LABSA and other builders in detergent formulations.
Handling & Safety
STPP is low in hazard and classified as non-hazardous for most purposes. It is mildly alkaline and can irritate the eyes and, as a dust, the skin and respiratory tract, so basic eye protection and dust control are sensible. It is not flammable.
Store it in a cool, dry place in closed containers, as it can absorb moisture and cake. Follow good hygiene practice for food grades and the current Safety Data Sheet. Note that phosphate builders are restricted in some markets for environmental reasons, so confirm what is permitted for your application.
Frequently Asked Questions
What is STPP used for?
As a detergent builder that softens water and boosts cleaning, a food moisture-retainer and texture aid (food grade), a ceramic deflocculant, and in water treatment.
What does a detergent builder do?
It sequesters hardness ions and keeps dirt suspended so surfactants clean more effectively, especially in hard water.
Is STPP safe?
It is low in hazard and non-hazardous for most purposes, needing only basic dust and eye precautions. Food-grade material is approved for food use within limits.
Why choose us as your STPP supplier?
We supply a 94% grade from trial quantities through to full bulk orders with batch documentation for detergent, food (food grade) and industrial use.
What packaging and order quantities are available?
We supply sodium tripolyphosphate from trial quantities through to full bulk orders. Contact us with your required volume for current pricing and lead time.
Your Trusted STPP Supplier
As an experienced STPP supplier, we serve detergent, food (food grade) and ceramic manufacturers with a consistent 94% grade. The right STPP supplier keeps your builder performance and cost stable, and as your STPP supplier we back every batch with documentation.
For further independent reference, see the Wikipedia entry on sodium triphosphate, and browse our full Surfactants & Cleaning range.
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