STPP (Granules)

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Sodium Tripolyphosphate (STPP) in granulated form is a versatile, high-purity inorganic compound widely used in industrial, cleaning, and food processing applications. Presented as free-flowing white granules, this form offers excellent solubility and ease of handling, making it ideal for automated dosing and blending. Granular STPP is valued for its water-softening, dispersing, emulsifying, and preservative properties, supporting a wide range of formulations across multiple industries.

 

Description

Primary Uses
Detergent & Cleaning Products Industry
Water Softener & Builder: Chelates calcium and magnesium ions to enhance detergent efficiency.

Dispersing Agent: Keeps soil and particulate matter suspended during cleaning cycles to prevent redeposition.

Stain Removal: Helps break down grease, oils, and protein soils for improved cleaning.

pH Buffer: Maintains alkaline environment to optimize cleaning reactions.

Anti-scaling Agent: Prevents mineral deposits in washing machines and industrial cleaning systems.

Ceramic & Tile Industry
Deflocculant for Clay Slips: Reduces viscosity and improves fluidity for better mold filling.

Dispersing Agent: Ensures uniform distribution of particles in ceramic formulations.

Sintering Aid: Enhances compactness and strength of fired ceramic products.

Water Treatment Industry
Scale Inhibitor: Controls calcium and magnesium salt deposits in cooling and boiler systems.

Corrosion Inhibitor: Protects metal surfaces by sequestering iron and other metal ions.

Dispersant: Maintains suspended solids to improve water clarity and flow.

 

Secondary Uses
Food Industry (Food Grade Granules only)
Moisture Retention: Improves water-binding capacity in seafood, poultry, and meat products.

Texture Enhancer: Enhances tenderness and mouthfeel in processed foods.

Emulsifier & Stabilizer: Supports uniformity in processed cheese, sauces, and dairy products.

Preservative: Extends shelf life by inhibiting microbial growth.

Color Retention: Maintains natural appearance of frozen and canned foods.

pH Regulator: Helps maintain food stability and flavor.

Textile Industry
Chelating Agent: Removes hardness ions to improve dye uptake and fabric quality.

Wetting Agent: Enhances penetration of dyes and chemicals into textiles.

Oil & Gas Industry
Drilling Mud Additive: Acts as dispersant and deflocculant to improve drilling fluid performance.

Scale Control: Prevents scale formation in production equipment.

Paper & Pulp Industry
Pitch Control: Prevents resin and wax deposits on paper machinery.

Bleach Stabilizer: Improves bleaching efficiency by controlling metal ions.

Paints & Coatings
Pigment Dispersant: Improves color uniformity and stability in water-based paints.

Anti-caking Agent: Prevents lump formation in powdered coatings.

Leather Industry
Degreasing Agent: Helps remove natural oils during hide processing.

Tanning Aid: Promotes even tanning agent distribution.

Construction Industry
Cement Additive: Acts as dispersant to improve workability and strength of cement mixtures.

Metal Surface Treatment
Descaling Agent: Removes oxide layers prior to plating or coating.

Mining & Mineral Processing
Flotation Reagent: Functions as dispersant and pH modifier in mineral recovery.

PRODUCT KEY FEATURES

Basic Identification Attributes
Chemical Name (IUPAC): Pentasodium triphosphate

Common/Trade Name: STPP Granules

CAS Number: 7758-29-4

HS Code: 2835.31.00

Synonyms: Sodium triphosphate, Pentasodium triphosphate, Tripolyphosphate

 

Physical & Chemical Properties
Physical State: Free-flowing white granules

Color & Odor: White; odorless

Melting Point: ~622 °C (decomposes)

Solubility: Soluble in water; insoluble in organic solvents

pH (1% solution): 9.2–10.0

Density: Approx. 1.0–1.2 g/cm³ (bulk density)

Hygroscopic: Yes

 

Safety & Hazard Attributes
GHS Classification: Eye Irritant Category 2A

Toxicity: Low toxicity; may cause irritation to eyes and skin

Exposure Limits: No specific occupational exposure limits

 

Storage & Handling Attributes
Storage Conditions: Store in dry, cool, well-ventilated areas protected from moisture

Container Type: 25kg or 50kg plastic-lined woven bags or fiber drums

Shelf Life: 24 months in original sealed packaging

Handling Precautions: Avoid dust generation and contact with skin and eyes

 

Regulatory & Compliance Attributes
Complies with REACH and TSCA regulations

Meets ISO 9001 quality management system standards

Manufactured under GMP and HACCP (for food grade)

Conforms to OSHA HCS and GHS workplace safety standards

Food-grade complies with FDA and EU food additive regulations (when applicable)

 

Environmental & Health Impact
Biodegradability: Not inherently biodegradable

Ecotoxicity: May contribute to eutrophication if released in large quantities

Bioaccumulation: Not significant

Environmental Notes: Wastewater treatment required to minimize phosphate discharge impact

SAFETY HANDLING PRECAUTIONS

PPE Required: Safety goggles, gloves, dust mask recommended

Handling Guidelines: Use adequate ventilation and dust control

Storage Measures: Keep containers sealed and dry, away from incompatible materials

 

First Aid Measures
Inhalation: Move to fresh air; seek medical attention if irritation persists

Skin Contact: Wash with soap and water; remove contaminated clothing

Eye Contact: Flush eyes with water for 15 minutes; get medical help if irritation continues

Ingestion: Rinse mouth; seek medical advice if large quantities ingested

 

Firefighting Measures
Fire Hazards: Non-flammable solid

Extinguishing Media: Water spray, dry chemical, foam, or COâ‚‚

Hazardous Combustion Products: Sodium oxides, phosphorus oxides under high heat