Product Name: Sodium Tripolyphosphate
Chemical Formula: Na5P3O10
Trade Names: STPP, Pentasodium Triphosphate
Recommended Uses: Detergent builder, water softener, food additive, ceramics, textile processing
Manufacturer: Supplier contact details and emergency phone number provided on request at point of purchase or inquiry
GHS Classification: Eye Irritant (Category 2A), Skin Irritant (Category 2)
Signal Word: Warning
Hazard Statements: Causes serious eye irritation, may cause skin irritation, harmful if swallowed in large amounts
Pictograms: Exclamation mark
Precautionary Statements: Avoid contact with eyes, skin, and clothing; do not breathe dust; wash hands thoroughly after handling; wear protective equipment
Chemical Name: Sodium Tripolyphosphate
CAS Number: 7758-29-4
EC Number: 231-838-7
Concentration: 95–100% STPP by weight; trace impurities (mainly sodium compounds) may be present at less than 2% overall; no hazardous stabilizing agents included under typical formulations
Inhalation: Move affected person to fresh air, support breathing as needed, seek medical attention if symptoms like coughing or breathing difficulty appear
Skin Contact: Remove contaminated clothing, rinse affected skin with water, seek medical advice for persistent irritation
Eye Contact: Rinse eyes with clean water for at least fifteen minutes, lifting eyelids occasionally, seek quick medical attention if redness or discomfort continues
Ingestion: Rinse mouth, give water if person is conscious, do not induce vomiting, get medical help if large quantities are swallowed or discomfort occurs
Suitable Extinguishing Media: Use water spray, dry chemical, CO2, or foam for surrounding fire, the product itself does not burn
Specific Hazards: Not flammable or explosive; thermal decomposition in large fires produces hazardous sodium oxide and phosphorus oxide fumes
Protective Equipment for Firefighters: Wear self-contained breathing apparatus and full protective gear when dealing with decomposition products in confined areas
Personal Precautions: Use dust mask, safety goggles, and gloves to avoid contact; ensure proper ventilation
Environmental Precautions: Prevent entry to surface water, drains, or sewers; minimize dust generation; large spills may contribute to phosphate pollution in waterways
Cleanup Methods: Sweep or vacuum dry material, place in appropriate waste containers; wash spill area with water while controlling runoff to local treatment systems
Handling: Use local exhaust to minimize dust; avoid creating airborne particles; handle in well-ventilated places; wear safety equipment
Storage: Store in tightly sealed containers in cool, dry, ventilated areas; keep separate from acids and oxidizers; avoid exposure to moisture to prevent caking
Special Considerations: Practice good hygiene, keep food and drinks away from handling areas, and label all containers clearly
Engineering Controls: Use local exhaust or general ventilation to control dust levels below recommended limits
Exposure Limits: OSHA PEL and ACGIH TLV for nuisance dust: 15 mg/m3 (total dust), 5 mg/m3 (respirable)
Personal Protective Equipment: Dust mask or respirator, chemical-resistant gloves, safety goggles, lab coat or coveralls; wash up thoroughly afterward
Other Controls: Have eyewash stations and safety showers in proximity
Appearance: White crystalline or granular powder
Odor: Odorless
pH: 9.2–10.0 (1% solution at 25°C)
Solubility: Soluble in water
Melting Point: Decomposes above 600°C
Density: Around 2.5 g/cm3
Vapor Pressure: Not applicable as a solid
Relative Molecular Mass: 367.86 g/mol
Chemical Stability: Stable under normal temperatures and recommended handling conditions
Incompatible Materials: Strong acids (liberates phosphoric acid), strong oxidizers (potential for exothermic reactions or hazardous release)
Hazardous Decomposition Products: Produces sodium and phosphorus oxides above decomposition temperature or in the event of a large fire
Reactivity: Avoid moisture exposure as caking may occur and product flow might be compromised
Acute Toxicity: Oral LD50 (rat): between 1,000–3,000 mg/kg; ingestion of large quantities results in irritation or burns, gastrointestinal upset
Skin and Eye Contact: Prolonged exposure causes redness, irritation, or burns
Inhalation: Dust may irritate respiratory tract, repeated exposure may worsen existing respiratory diseases
Chronic Effects: No conclusive evidence for carcinogenicity, mutagenicity, or reproductive toxicity at expected workplace exposures
Medical Conditions Aggravated: Asthma, chronic lung diseases, pre-existing skin or eye conditions
Aquatic Toxicity: Not acutely toxic to aquatic organisms at low concentrations, but phosphate content can accelerate eutrophication and algae growth
Persistence and Degradability: Dissolves in water, breaks down to phosphate ions which are persistent in environment
Bioaccumulation: Unlikely to accumulate in living organisms
Mobility: High mobility in water due to solubility
Other Effects: Improper releases upset nutrient balance in natural water systems
Waste Disposal Methods: Dispose of in accordance with local, regional, national, and international regulations; don’t dump large quantities into sewers or open water
Packaging Disposal: Empty and triple rinse containers; offer for recycling or dispose via approved waste management methods
Precautions: Avoid raising dust and use appropriate personal protection during disposal or handling of residue
UN Number: Not regulated under standard hazardous materials transport codes
Transport Hazard Class: Not classified as hazardous
Packing Group: Not applicable
Proper Shipping Name: Sodium Tripolyphosphate
Special Precautions: Secure loads against shifting, keep dry during shipment, avoid mixing with incompatible materials in transit
TSCA Status: Listed
REACH Registration: Registered in the EU
SARA Title III Data: Not listed as an extremely hazardous substance
WHMIS Classification: D2B (Toxic Material Causing Other Toxic Effects)
Other Country-Specific Rules: Meets food additive status under certain purity standards in North America and Europe
Labeling Requirements: Eye and Skin Irritant; all relevant hazard and precautionary phrases included on packaging per GHS
