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Chemical name: Sodium Tripolyphosphate
Common names: STPP, triphosphoric acid pentasodium salt
Appearance: White, granular or crystalline powder
Odor: No noticeable smell
Molecular formula: Na5P3O10
Common uses: Detergents, water treatment, food processing, ceramics
Risk classification: Irritant to skin and eyes, respiratory tract potentially affected if dust is inhaled
Main hazards: Sneezing, coughing, redness, stinging sensation on skin contact
Pictogram (GHS): Exclamation mark (for irritant effects)
Long-term risk: Chronic exposure can lead to dermatitis or other mild health complaints depending on handling
Sodium Tripolyphosphate (Na5P3O10): Typically above 85% by weight
Other components: Small amounts of related phosphates or sodium salts, often trace amounts only
Inorganic nature: Contains sodium and phosphorus in polyphosphate form
Known impurities: Usually minimal when manufactured for industry
Inhalation: Move person to fresh air quickly; loosen clothing and encourage slow breathing
Eye contact: Rinse eyes gently with water, keep eyelids apart, flush for as long as comfortable
Skin contact: Remove any contaminated clothing, wash skin with soap and water
Ingestion: Rinse mouth if the person is conscious, do not induce vomiting unless suggested by a doctor
Flammability: Non-flammable, not considered a combustible material
Notable risks: Gives off hazardous fumes like sodium oxide and phosphorus oxides at high temperatures
Suitable extinguishing agents: Use water spray, foam, dry chemical powder, or CO2 for packaging or surroundings
Protective action: Firefighters should wear full protective gear and self-contained breathing apparatus to avoid exposure to fumes
Personal precautions: Avoid dust, ventilate area, evacuate non-essential personnel
Spill clean-up: Sweep up carefully, avoid generating dust, collect for disposal in suitable container
Environmental concerns: Avoid release to drains or surface water, contain spill if possible
Decontamination: Wash area with plenty of water once material is picked up
Handling: Use care while pouring or transferring, avoid creating dust, wear protective gear
Work practices: Clean up spills quickly, don’t mix with incompatible substances like strong acids
Storage: Keep in cool, dry, well-ventilated location, protected from moisture
Segregation: Separate from acids and reducing agents to prevent unwanted chemical reactions
Engineering controls: Use local exhaust to minimize airborne dust, especially during bulk handling
Personal protective equipment: Safety goggles or glasses, protective gloves, dust mask or respirator when exposure risk is present
Hygiene measures: Wash hands thoroughly after handling, keep contaminated protective gear separate from regular clothing
Workplace limits: No specific occupational exposure limits set in most regions, but controlling dust is a basic safety step
Form: Odorless, white crystalline powder or granules
Solubility: Soluble in water, creates alkaline solution
Boiling/Melting Point: Loses water at high temperature, decomposes above 600°C
Density: About 2.5 g/cm3
pH (1% soln): Around 9.0-10.0
Stability under normal conditions: Stable when dry, slowly hydrolyzes in humid conditions
Chemical stability: Stable under typical storage and use
Potentially reactive with: Strong acids, which release phosphoric acid
Incompatible substances: Strong oxidizers, reducing agents
Decomposition: High temperatures create hazardous sodium oxide and phosphorus oxides
Acute oral effects: May cause mild irritation if swallowed in large amounts
Skin contact: Can create redness, dryness, or slight burns with prolonged exposure
Inhalation: Breathing dust may cause nose and throat irritation
Sensitization: Not considered a skin sensitizer, but repeated contact can cause irritation
Carcinogenicity: Not classified as a carcinogen by major regulatory bodies
Aquatic impact: Excess release may contribute to eutrophication, encouraging algae blooms that deplete oxygen in waterways
Degradability: Breaks down to phosphate ions in the environment
Mobility: Soluble, can move easily in water systems
Bioaccumulation: Not likely to build up in living organisms
Waste treatment: Dispose of in accordance with local, regional, or national regulations
Landfill suitability: Possible, provided no contamination of water or food supply
Sewage disposal: Should not enter sewage or drainage systems to avoid water pollution
UN Number: Not classified as hazardous for transport
Transport type: General cargo, not labeled as dangerous
Packaging: Robust bags or drums to keep material dry and prevent spillage
Special precautions: Protect packaging from humidity, avoid loading with incompatible chemicals
Global status: Widely regulated as a food additive and an industrial chemical
Labeling: Often classified as irritant, labels highlight need for eye and skin protection
Restrictions: Some countries limit use in consumer detergents to help fight waterway pollution caused by phosphates
