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Product Name: Tetrasodium Pyrophosphate
Synonyms: TSPP, Sodium Pyrophosphate, Tetrasodium Diphosphate
Chemical Formula: Na4P2O7
CAS Number: 7722-88-5
Recommended Use: Water treatment, detergents, food additive, ceramics, metal cleaning
Manufacturer Information: Supplied by industrial chemical providers; contact local distributor for details
GHS Classification: Eye Irritation Category 2A, Skin Irritation Category 2
Signal Word: Warning
Hazard Statements: Causes serious eye irritation. May cause skin irritation on contact.
Precautionary Statements: Avoid breathing dust, wash hands thoroughly after handling, use eye protection, wear protective gloves, and prevent dust generation.
Symptoms of Overexposure: Redness, itching, or pain in eyes and skin, potential respiratory discomfort if inhaled
Ingredient: Tetrasodium Pyrophosphate
Concentration: 98–100%
Impurities: May contain trace amounts of orthophosphates
EC Number: 231-767-1
Inhalation: Move person to fresh air, seek medical attention if respiratory symptoms continue.
Skin Contact: Rinse skin with plenty of water, remove contaminated clothing, seek help if irritation persists.
Eye Contact: Immediately rinse with water for at least 15 minutes, keep eyes open, consult an eye specialist if redness or pain continues.
Ingestion: Do not induce vomiting, rinse mouth with water, drink plenty of water, and consult medical personnel promptly.
Most Important Symptoms and Effects: Irritation, burning sensations in eyes and on skin
Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide for nearby fires.
Hazards Arising from Substance: Decomposition may emit harmful phosphorus oxides.
Special Protective Equipment for Firefighters: Wear self-contained breathing apparatus, full protective clothing.
Specific Methods: Avoid inhaling dust or fumes, control runoff to prevent environmental contamination.
Personal Precautions: Avoid contact with skin and eyes, ventilate area, use appropriate PPE (gloves, goggles, mask).
Environmental Precautions: Prevent spillage from entering drains, watercourses, or soil.
Cleanup Methods: Sweep up material gently to minimize dust, collect in suitable container for disposal, flush final trace with water, ventilate and clean affected area.
Handling: Minimize dust generation, avoid contact with skin and eyes, handle using appropriate protective measures, wash thoroughly after use.
Storage: Store tightly sealed in a cool, dry, and well-ventilated area, away from acids, moisture, and foodstuff.
Incompatibilities: Avoid contact with strong acids, oxidizers, and reactive metals.
Occupational Exposure Limit: No specific limit established; workplace guidelines suggest keeping total dust below 10 mg/m3.
Engineering Controls: Ensure proper ventilation, use local exhaust to reduce airborne dust.
Personal Protective Equipment: Use chemical-resistant gloves, safety goggles, dust mask or respirator, protective clothing.
Hygiene Measures: Never eat, drink, or smoke in work area, wash hands before breaks, remove contaminated clothing before entering communal areas.
Appearance: White crystalline powder
Odor: Odorless
Molecular Weight: 265.90 g/mol
pH (1% solution): 10.0–10.8
Melting Point: 988 °C
Solubility: 7 g/100 mL in water (25 °C)
Density: 2.53 g/cm3
Boiling Point: Not applicable (decomposes)
Vapor Pressure: Not significant at room temperature
Flash Point: Non-flammable
Chemical Stability: Stable under normal storage and usage conditions
Reactivity: Reacts with strong acids to release phosphoric acid, generates heat on dissolution
Hazardous Decomposition Products: Phosphorus oxides under fire conditions
Incompatible Materials: Acids, oxidizing agents, aluminum, zinc
Polymerization: Does not polymerize
Acute Toxicity: Oral LD50 (rat): approximately 3000 mg/kg
Chronic Effects: Prolonged exposure causes irritation, no proven long-term health hazards at occupational levels
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Potential Health Effects: Skin and eye irritation, upper respiratory tract discomfort, gastrointestinal distress if swallowed
Carcinogenicity: No classification as carcinogen by NTP, IARC, OSHA
Toxicity to Aquatic Life: May disrupt aquatic ecosystems in large concentrations (not acutely toxic at expected usage levels)
Persistence and Degradability: Inorganic phosphate released degrades slowly in soil/water
Bioaccumulation: Does not tend to bioaccumulate
Mobility in Soil: Soluble, may leach into waterways
Other Adverse Effects: Excessive release contributes to eutrophication in water bodies
Waste Disposal: Dispose of in accordance with local, regional, and national regulations
Container Disposal: Triple-rinse empty containers, use designated chemical waste facilities
Special Precautions: Avoid uncontrolled discharge, do not allow large quantities to reach sewer or water supply
UN Number: Not regulated
Transport Hazard Class: Not classified as dangerous for transport
Packing Group: Not applicable
Environmental Hazards: Not classified as marine pollutant
Special Transport Precautions: Protect from moisture, ensure containers stay sealed, prevent dust emission during loading/unloading
TSCA Status: Listed in US TSCA Inventory
REACH Status: Registered in accordance with European directives
SARA Title III: Not classified as hazardous under SARA, Section 313
California Proposition 65: Not listed
Other Restrictions: Follow workplace and community right-to-know laws, observe local environmental protection regulations
