About this product
STPP is Sodium Tripolyphosphate (Na5P3O10, CAS 7758-29-4), a white powder or granule that sequesters calcium and magnesium hardness ions in water. That chelating action makes it a core detergent builder in washing powders, liquid detergents and household cleaners, and a scale-control agent in ETP and cooling-water systems. We stock Technical Grade STPP in 50 kg HDPE/laminated bags at our Redhills warehouse in Chennai and dispatch across South India.
Applications & Uses
Safety & Technical Documents
MSDS / SDS
TDS / COA
Certificate of Analysis · with every supply, on request
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Product DataTechnical Specifications
Physical Properties
- Appearance
- White powder / granule
- Purity
- 94.0 % mass min (as Na5P3O10)
- Assay
- Total phosphate (as P2O5) 57.0 % mass min
- pH
- 9.2 – 10.0 (1% solution)
Supply & Packaging
- Packaging
- 50 kg HDPE/laminated bags
- Grades Available
- Technical Grade
Compliance & Storage
- HS Code
- 2835 31 00
- Hazard Class
- Non-hazardous for transport; mild eye and respiratory irritant as a dust
- Storage
- Store dry in sealed bags away from moisture. Use in ventilated areas and avoid dust generation.
These specs are indicative. Request a Certificate of Analysis (COA) for batch-specific values.
Source Manufacturers
Sourced directly from verified manufacturers for consistent quality and traceability.
Supplied across South IndiaCoimbatoreMaduraiHosurBangaloreHyderabadVisakhapatnamKochi
Frequently Asked Questions
What is the full form of STPP?
STPP stands for Sodium Tripolyphosphate, chemical formula Na5P3O10. Buyers also search it as sodium triphosphate, pentasodium triphosphate or penta sodium tripolyphosphate.
What is the CAS number of Sodium Tripolyphosphate?
The CAS number for Sodium Tripolyphosphate (STPP) is 7758-29-4. Its HSN code for Indian import and procurement documentation is 2835 31 00.
What is STPP used for in detergents?
STPP works as a builder and sequestrant: it chelates the calcium and magnesium hardness ions in wash water so the surfactant can work efficiently. It is used in detergent powders, liquid detergents, household cleaners and industrial or institutional cleaning chemistry, typically alongside SHMP, sodium silicate and EDTA.
What purity and pH does technical grade STPP have?
The grade we stock is Technical Grade, specified at 94.0 % mass min Sodium Tripolyphosphate (Na5P3O10), 57.0 % mass min total phosphate as P2O5, pH 9.2 to 10.0 in 1 % solution, whiteness 90 % min and water insoluble matter 0.10 % max. These values follow the manufacturer's published specification, not SPC testing.
Is STPP hazardous, and how should it be stored?
STPP is non-hazardous for transport. It is a mild eye and respiratory irritant as a dust, so avoid dust generation, use it in ventilated areas, and store it dry in sealed bags away from moisture.
Who supplies STPP in Chennai and in what packaging?
We supply STPP from our Redhills, Chennai warehouse in 50 kg HDPE/laminated bags, with dispatch across South India. Manufacturers we work with on this product include Aditya Birla Group and GSFC. Order sizes depend on packaging and current stock — call or WhatsApp +91 86087 80096 for a quote, TDS or MSDS.
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Product Details
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