Product Name: Sodium Tripolyphosphate
Common Synonyms: STPP, pentasodium triphosphate
CAS Number: 7758-29-4
Recommended Use: Cleaning agents, detergents, water softener, ceramics, textile processing
Supplier: Please contact your local supplier directly for up-to-date information
Emergency Contact: Refer to the manufacturer’s contact line for emergencies or local poison control center.
Hazard Classification: Eye irritation (Category 2A), Skin irritation (Category 2)
Label Elements: Signal word “Warning”, exclamation mark hazard pictogram
Hazard Statements: Causes serious eye irritation, may cause skin irritation on prolonged contact
Precautionary Statements: Wash hands thoroughly after handling, wear suitable protective gloves and eye protection
Other Hazards: Dust formation can irritate respiratory tract, not listed as carcinogenic by IARC, NTP, or OSHA.
Chemical Name: Sodium Tripolyphosphate
Formula: Na5P3O10
Concentration: ≥ 94% by weight
Other Components: Minor impurities may include sodium phosphate, water (<1%), no hazardous stabilizers or additives indicated.
Inhalation: Move person to fresh air, support breathing as needed, seek medical advice if symptoms persist (coughing, throat irritation)
Skin Contact: Remove contaminated clothing, rinse affected skin with plenty of water, wash with soap, seek medical attention if irritation develops
Eye Contact: Immediately flush eyes gently with plenty of water for at least 15 minutes, remove contact lenses if present and easy, seek medical attention
Ingestion: Rinse mouth, do not induce vomiting, drink water if conscious, seek medical assistance right away.
Suitable Extinguishing Media: Use water spray, foam, dry chemical, or CO2 for surrounding fire
Unsuitable Media: Avoid high-pressure water streams that may spread powder
Specific Hazards: Material is not flammable, product decomposes at high temperatures producing sodium oxide and phosphorus oxides gases
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective gear
Special Procedures: Cool exposed containers with plenty of water, avoid release of contaminated fire run-off into environment.
Personal Precautions: Evacuate unnecessary personnel, use personal protective equipment to prevent dust contact with skin and eyes
Environmental Precautions: Prevent product from entering drains, waterways, and soil
Cleanup Methods: Avoid dust formation, carefully sweep or vacuum up material, collect in a suitable container for proper disposal, ventilate area as needed.
Handling: Wear safety goggles, gloves, and dust mask, avoid breathing dust, keep away from food, beverages, and incompatible substances like strong acids
Storage: Store in tightly closed containers in cool, dry, well-ventilated areas, keep away from moisture and direct sunlight, do not stack heavy loads on top, store away from acids and oxidizing agents.
Exposure Limits: No specific OSHA or ACGIH exposure limits, use good industrial hygiene practices
Engineering Controls: Use local exhaust ventilation or other engineering controls to keep airborne levels below recommended exposure limits
Personal Protective Equipment: Wear chemical-resistant gloves, safety goggles, dust mask or NIOSH-approved respirator, protective clothing if handling large amounts
Hygiene Measures: Wash hands and face thoroughly after handling, remove contaminated clothing and wash before reuse, avoid eating or smoking while working with the product.
Appearance: White crystalline or granular powder
Odor: Odorless
pH (1% solution): 9–10
Melting Point: >600°C (decomposes)
Boiling Point: Not applicable (decomposes on heating)
Solubility in Water: 14.5g/100g at 25°C
Specific Gravity: 2.52
Bulk Density: Approximately 0.9–1.1 g/cm3
Vapor Pressure: Not applicable
Flash Point: Not flammable
Explosive Properties: Not explosive
Oxidizing Properties: Not classified as oxidizing
Other Data: Hygroscopic, absorbs moisture from air.
Chemical Stability: Stable under normal conditions, does not polymerize
Conditions to Avoid: Exposure to moisture, high temperatures, and acids
Incompatible Materials: Strong acids, strong oxidizers, aluminum, magnesium
Hazardous Decomposition Products: Heating can produce toxic fumes of sodium oxide and phosphorus oxides
Reactivity: Reacts with acids to release heat and phosphorus-containing gases, attacks some metals in the presence of moisture.
Acute Toxicity: LD50 (oral, rat): ~3,120 mg/kg, low toxicity via inhalation or skin contact
Skin Corrosion/Irritation: Prolonged contact may cause moderate irritation, redness, dryness
Serious Eye Damage/Irritation: Causes serious eye irritation
Respiratory Sensitization: Dust inhalation may trigger throat and nose symptoms
Long-Term Effects: Prolonged overdoses in industrial settings could result in kidney or bone effects (rare).
Carcinogenicity: Not listed as carcinogen by IARC, NTP, or OSHA
Other Effects: Not mutagenic or teratogenic in standard studies on phosphate salts.
Ecotoxicity: Large releases may contribute to water eutrophication, can reduce oxygen levels and harm aquatic life
Aquatic Toxicity: LC50 (fish, 96 hours): >100 mg/L
Persistence and Degradability: Inorganic material, not biodegradable, breaks down into phosphates in water
Bioaccumulation Potential: Not bioaccumulative
Mobility in Soil: High solubility, leaches into the soil and water easily
Other Adverse Effects: Excess nutrients can stimulate algal blooms, leading to ecological imbalances.
Waste Disposal: Collect waste product in labeled containers, comply with local, state, and federal disposal regulations
Disposal Methods: Disposal at permitted municipal or industrial waste facilities
Environmental Cautions: Avoid disposal into storm drains, open land, water bodies, minimize impact by using according to recommended applications, do not burn waste
Contaminated Packaging: Clean container thoroughly before recycling or disposal.
UN Number: Not classified as dangerous for transport
Proper Shipping Name: Sodium Tripolyphosphate
Transport Hazard Class: Not hazardous
Packing Group: Not assigned
Special Precautions: Protect packaging from moisture, condensation, and rough handling during shipment
Marine Pollutant: Not regulated as marine pollutant (check local regulations)
IMDG/IATA/ADR: No special requirements due to low hazard classification.
OSHA Status: Not regulated as a hazardous chemical under OSHA HCS 29 CFR 1910.1200
TSCA: Listed in US Toxic Substances Control Act Inventory
EU Regulations: EINECS/ELINCS listed (231-838-7), not classified as hazardous under EU CLP
SARA 313: Not subject to reporting
California Proposition 65: Not listed
Other USA/State Regulations: Follow applicable regional or local requirements, product labeling to include hazard and precautionary details as outlined by GHS standards.
