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Product Name: Disodium Pyrophosphate
SYNONYMS: Sodium Acid Pyrophosphate, SAPP, Tetrasodium Diphosphate
CAS Number: 7758-16-9
Recommended Uses: Leavening agent, water treatment, food additive
Supplier Information: Available through most chemical supply companies, with contact details varying depending on jurisdiction
Emergency Contact: Refer to local poison control center or chemical safety authority
Classification: Irritant to eyes, skin, and respiratory system
Hazard Statements: Causes serious eye irritation, may cause skin and respiratory irritation
Pictograms: Exclamation mark for irritancy
Precautionary Statements: Avoid breathing dust, use in well-ventilated spaces, wear protective gear, wash hands after handling
Signal Word: Warning
Target Organs: Eyes, skin, respiratory tract
Chemical: Disodium Pyrophosphate
Formula: Na2H2P2O7
Concentration: 98–100%
Impurities: Trace amounts of sodium phosphates or phosphoric acid, typically below 1%
Molecular Weight: 221.94 g/mol
Inhalation: Remove from exposure, move to fresh air, seek medical attention for breathing difficulties
Skin Contact: Remove contaminated clothing, rinse thoroughly with soap and water
Eye Contact: Rinse cautiously with water for at least 15 minutes, remove contact lenses if present, seek medical advice
Ingestion: Rinse mouth, do not induce vomiting, seek medical help immediately if large amount ingested
Advice for Physicians: Treat symptomatically, monitor for respiratory, cardiac, or dermal complications
Flammability: Not combustible
Suitable Extinguishing Media: Use media appropriate for surrounding fire, including water spray, foam, dry chemical, CO2
Specific Hazards: At high temperatures, forms toxic fumes of sodium oxide and phosphorus oxides
Protective Equipment: Firefighters should wear self-contained breathing apparatus and protective clothing
Special Procedures: Keep containers cool with water spray to prevent decomposition
Explosion Risk: Product does not present explosion hazard under normal conditions
Personal Precautions: Evacuate area, ventilate if possible, wear gloves, goggles, and dust mask
Environmental Precautions: Avoid entry into waterways, sewers, and soil
Cleanup Methods: Collect solid material with shovel or vacuum, place in suitable container for disposal, wipe area with wet cloth to reduce dust
Disposal: Dispose of in line with national and local regulations for phosphates
Notification Procedures: Report large spills to environmental authorities
Handling: Minimize dust generation, avoid breathing dust, keep containers sealed, wash hands before breaks
Safe Practices: Use with local exhaust ventilation, keep away from incompatible materials such as strong acids
Storage: Store in cool, dry, well-ventilated area, away from moisture, heat, and direct sunlight, keep container tightly closed
Incompatibilities: Strong acids, strong oxidizing agents may react aggressively
Packaging Materials: Use corrosion-resistant, tightly sealing containers
Occupational Exposure Limits: No strict OSHA or ACGIH limits, but keep airborne dust as low as possible
Engineering Controls: Local exhaust ventilation, general room ventilation
Personal Protective Equipment: Chemical-resistant gloves, safety goggles, dust mask or NIOSH-approved respirator, apron when risk of splashing exists
Hygiene: No eating, drinking, or smoking during use, change contaminated clothes, wash hands after handling
Monitoring: Periodic air sampling for dust levels recommended in enclosed environments
Appearance: White, crystalline powder
Odor: Odorless
pH (1% Solution): 9.2–10.2
Melting Point: Decomposes above 850°C
Solubility (Water): 6.5 gram/100 mL at 25°C
Density: 2.534 g/cm³
Vapor Pressure: Negligible
Boiling Point: Not applicable (decomposes)
Partition Coefficient: Not available
Evaporation Rate: Not applicable
Flash Point: Not flammable
Other: Non-volatile, stable in dry air
Chemical Stability: Stable under recommended storage conditions
Decomposition Products: At high temperatures, releases oxides of phosphorus and sodium
Reactivity: Reacts with strong acids to form phosphoric acid, forms heat upon mixing with water
Incompatible Materials: Strong oxidizing agents, strong acids
Hazardous Polymerization: Will not occur
Conditions to Avoid: Prolonged contact with moisture, exposure to strong heat
Acute Toxicity: Oral LD50 (rat) ~4000 mg/kg, considered low toxicity by ingestion
Chronic Effects: Prolonged skin contact can cause irritation or dermatitis
Inhalation Effects: Exposure to dust may cause irritation of respiratory passages, coughing, sneezing
Eye Effects: Causes severe irritation, pain, redness, and possible damage with repeated exposure
Carcinogenicity: Not listed as a carcinogen by IARC, NTP, or OSHA
Mutagenicity: No evidence found in available literature
Sensitization: Not expected to cause skin sensitization
Target Organs: Eyes, skin, respiratory tract
Ecotoxicity: Low toxicity for aquatic life, can contribute to eutrophication in surface waters
Persistence/Degradability: Inorganic, readily dissociates under environmental conditions
Bioaccumulative Potential: Does not bioaccumulate
Mobility in Soil: High, due to water solubility
Other Adverse Effects: Large discharges may stimulate algae growth, disrupt aquatic ecosystems
Regulations: Prevent release to natural waterways, follow best practices for phosphate management
Method of Disposal: Small amounts can be dissolved, neutralized and disposed via local regulations; large quantities require hazardous waste contractor
Packaging Disposal: Rinse empty containers thoroughly before recycling or disposal
Precautions: Do not dump in ecological-sensitive areas or conventional sinks
Legal Requirements: Dispose according to official regulations for phosphate-containing waste, obtain proper waste transport permits
UN Number: Not regulated as hazardous for transport
Transport Hazard Class: Not classified
Packing Group: None
Labeling: No specific labeling required for non-bulk containers
Special Precautions: Prevent package rupture, keep dry during transport, avoid stacking to prevent package breakage
International Transportation: Not listed as dangerous under ADR, IMDG, IATA
Shipping Name: Disodium Pyrophosphate, keep away from incompatible materials in transit
US Regulations: Listed on TSCA inventory, not subject to SARA Title III Sections 302 or 313 reporting
EU Regulations: REACH registered, not classified as a hazardous substance or mixture under CLP
Food Additive Status: Approved for use in food by FDA and EFSA within specific limits
Workplace Regulation: No specific OSHA PEL, general dust safety standards apply
Environmental Regulations: Subject to regulation under the Clean Water Act for phosphate compounds
Other Information: Safety standards reflect updates from ACGIH, ECHA, local country regulations; regular review suggested
