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Product Name: Sodium Acid Pyrophosphate
Chemical Formula: Na2H2P2O7
CAS Number: 7758-16-9
Synonyms: Disodium Dihydrogen Pyrophosphate, Disodium Pyrophosphate
Intended Use: Leavening agent, sequestrant, food additive, water treatment
Manufacturer: Details provided by supplier
Contact Information: Emergency and technical information available from supplier
GHS Classification: Eye irritation (Category 2A)
Signal Word: Warning
Hazard Statements: Causes serious eye irritation. May cause skin irritation. Dust may cause respiratory tract irritation.
Pictograms: Exclamation mark
Precautionary Statements: Wash exposed skin after handling. Wear protective gloves and eye protection. Avoid breathing dust. Use in a well-ventilated area.
Potential Acute Health Effects: Irritation to eyes, skin, and respiratory tract.
Potential Chronic Health Effects: Long-term exposure may cause persistent skin irritation or inflammation.
Substance Name: Sodium Acid Pyrophosphate
Chemical Identity: Na2H2P2O7
Purity: Greater than 95%
Impurities: Trace amounts of orthophosphates and sodium phosphate salts
Other Additives: May contain anti-caking agents (food grade)
Eye Contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Get medical attention if irritation persists.
Skin Contact: Wash with plenty of soap and water. Remove contaminated clothing. Get medical advice if irritation develops.
Inhalation: Move person to fresh air. Seek medical advice if respiratory irritation persists.
Ingestion: Rinse mouth. Do not induce vomiting unless directed by medical personnel. Call a physician or poison control center if feeling unwell.
Symptoms and Effects: Eye redness, pain, respiratory discomfort, skin dryness or irritation
Suitable Extinguishing Media: Water spray, foam, dry chemical, carbon dioxide.
Specific Hazards: Product is not flammable. At high temperatures, may emit irritating phosphate fumes.
Protective Equipment: Full protective gear and self-contained breathing apparatus recommended for large fires.
Special Procedures: Avoid breathing dust and fumes. Prevent runoff from entering drains or waterways.
Personal Precautions: Use personal protective equipment including gloves, safety goggles, and respiratory protection.
Spill Procedures: Avoid generating dust. Sweep up or vacuum spill, place in a suitable container for disposal.
Environmental Precautions: Prevent entry into soil, sewers, waterways. Notify authorities if large spills occur.
Cleanup Methods: Wash affected area with water after removal of material.
Safe Handling: Handle in a well-ventilated area. Avoid contact with skin, eyes, and clothing. Prevent formation of dust.
Hygiene: Wash hands and face thoroughly after handling. Do not eat, drink, or smoke in areas where product is handled.
Storage Requirements: Store locked up in tightly closed containers. Keep in a dry, cool, well-ventilated place.
Incompatible Materials: Avoid contact with strong acids and bases. Store away from oxidizing agents.
Packaging: Use original containers tightly sealed; suitable materials include HDPE bags or drums.
Exposure Limits: No specific OSHA, ACGIH, or NIOSH exposure limits established for SAPP. Recommended workplace limit is to minimize inhalable dust.
Engineering Controls: General ventilation, local exhaust at points of dust generation.
Personal Protective Equipment: Goggles for eye protection, chemical-resistant gloves, dust mask or respirator (NIOSH-approved P2 or equivalent).
Other Protection: Protective clothing to reduce skin exposure; provide an eyewash station nearby.
Monitoring: Periodic dust level assessment in workplace air recommended where regular handling occurs.
Appearance: White, odorless powder or granules
Odor: Odorless
Molecular Weight: Approximately 221.94 g/mol
pH (1% solution): 4.0 - 5.0
Melting Point / Freezing Point: Decomposes above 600°C
Boiling Point: Not applicable (decomposes on heating)
Solubility: Easily soluble in cold water
Vapor Pressure: Not applicable
Relative Density: 1.86 - 1.91 g/cm³
Flammability: Non-combustible
Partition Coefficient (n-octanol/water): Not determined
Other Properties: Stable under recommended conditions; may clump or cake if exposed to moisture.
Reactivity: Stable at normal temperature and storage conditions.
Chemical Stability: Stable in dry, sealed containers; absorbs moisture from air.
Incompatible Materials: Strong acids or alkalis, strong oxidizing agents.
Hazardous Decomposition: Thermal decomposition may release sodium oxides, phosphorous oxides, irritating fumes.
Polymerization: Will not polymerize.
Conditions to Avoid: Exposure to moisture and high temperatures.
Acute Toxicity: Oral LD50 (rat): > 2000 mg/kg (low toxicity).
Irritation: Causes serious eye irritation in rabbits. Mild skin irritation reported.
Corrosivity: Not corrosive.
Inhalation Risk: Dust may cause irritation of nose, throat, and respiratory tract.
Chronic Exposure: Long-term handling may produce dermatitis or worsen existing conditions.
Sensitization: Not a known sensitizer.
Carcinogenicity: No components listed as carcinogenic by IARC, NTP, OSHA.
Mutagenicity: No data indicating mutagenic effect.
Reproductive Toxicity: No significant reproductive impacts reported.
Ecotoxicity: Not acutely toxic to fish, daphnia, or algae under normal use and at low concentrations.
Persistence and Degradability: Substance is inorganic and not biodegradable, but readily dissolves in water.
Bioaccumulative Potential: Not bioaccumulative, does not build up in aquatic organisms.
Mobility in Soil: High mobility, water soluble, likely to remain in water solution.
Other Adverse Effects: Large releases may contribute to eutrophication in aquatic systems.
Waste Disposal Methods: Dispose of in accordance with local, regional, and national regulations. Small amounts may be dissolved and flushed with excess water if permitted. Avoid release into environment.
Container Disposal: Rinse containers thoroughly before discarding. Recycle or landfill containers if permitted.
Special Precautions: Do not allow large quantities to enter sewer or surface waters. Seek advice from waste disposal authorities for safe practices.
UN Number: Not regulated for transport.
Transport Hazard Class: Not classified as hazardous under current DOT, ADR, IMDG, IATA regulations.
Packing Group: No packing group assigned.
Environmental Hazards: Not an environmentally hazardous substance under transport rules.
Special Precautions: Ensure containers are sealed and dry during transport. Protect from moisture and physical damage.
Shipping Name: Sodium Acid Pyrophosphate or SAPP
US Regulations: Not a hazardous chemical under OSHA Hazard Communication Standard. Not listed in SARA Title III Sections 302, 304, or 313. FDA allows use in food under 21 CFR 182.1087.
Canada: Not controlled under WHMIS; considered a food additive.
EU Regulations: Included on EINECS (231-835-0). Not classified as dangerous; food-additive E450(ii).
Other Standards: Listed on AICS, DSL, ENCS, and other major chemical inventories.
Labeling Requirements: Warning for eye and skin irritation; use safe handling practices.
