Product Name: Sodium Pyrophosphate
Chemical Formula: Na4P2O7
CAS Number: 7722-88-5
Synonyms: Tetrasodium pyrophosphate, TSPP
Recommended Use: Water treatment, detergent manufacturing, food additive, ceramic production, industrial cleaners
Supplier Information: Manufacturer or distributor contact details including address and emergency telephone number
Emergency Contact: Local poison center, manufacturer’s emergency hotline, or 911 in the U.S.
GHS Classification: Eye irritation, Skin irritation, Acute oral toxicity
Signal Word: Warning
Hazard Statements: Causes serious eye irritation, May cause mild skin irritation, May be harmful if swallowed
Precautionary Statements: Avoid breathing dust, Wear appropriate eye and face protection, Wash hands thoroughly after handling, Do not eat, drink or smoke when using this product
Label Elements: Exclamation mark pictogram, hazard statements, manufacturer’s details
Chemical Name: Tetrasodium pyrophosphate
Common Name: Sodium Pyrophosphate
Percent of Mixture: 98-100%
Impurities: Minimal trace of sodium phosphate, sodium carbonate
CAS Number: 7722-88-5
Other Identifiers: E450 (iii) in food applications
If Inhaled: Move victim outdoors to fresh air. Seek medical attention for persistent symptoms such as shortness of breath or throat irritation.
If on Skin: Remove contaminated clothing. Rinse skin gently with water. Get medical advice for rashes or irritation.
If in Eyes: Rinse thoroughly with water for at least 15 minutes, holding eyelids apart. Get medical help for redness or pain.
If Swallowed: Rinse mouth, drink water, do not induce vomiting. Seek medical assistance for large ingestions or if symptoms develop.
Suitable Extinguishing Media: Use water spray, dry chemical, carbon dioxide or foam for surrounding fire. Product itself does not ignite easily.
Specific Hazards: Heated material may emit phosphorous oxides.
Protective Equipment for Firefighters: Wear self-contained breathing apparatus and protective clothing to prevent exposure to dust and combustion products.
Explosion Risk: Not considered explosive, but dust might accumulate and cause small static ignition in unusual circumstances.
Personal Precautions: Use protective equipment including gloves, goggles, and dust masks. Avoid inhaling dust or allowing contact with skin and eyes.
Environmental Precautions: Prevent spillage from entering drains, surface water or soil to reduce risk of eutrophication.
Clean-Up Methods: Sweep or scoop spilled material into closed containers for disposal. Use water spray to minimize dust. Avoid dry sweeping if possible to decrease airborne dust.
Handling: Minimize dust generation by using appropriate engineering controls. Handle in well-ventilated areas. Wear eye and skin protection. Do not eat, drink or smoke near working areas.
Storage Conditions: Store in cool, dry places in tightly sealed containers. Keep away from strong acids and moisture. Use corrosion-resistant shelving.
Incompatibilities: Do not store with acids or oxidizing agents. Store away from high humidity.
Engineering Controls: Use local exhaust ventilation or work in a fume hood to limit airborne particles. Maintain good workplace hygiene.
Personal Protective Equipment: Wear chemical safety goggles, gloves made of nitrile or rubber, long-sleeved clothing, and dust respirator if airborne dust approaches the threshold limit.
Exposure Limits: Occupational exposure limits for nuisance dust may apply (ACGIH TLV for particulates not otherwise regulated, usually 10 mg/m³ for total dust).
Appearance: White, odorless granular powder or crystals
Odor: None
Molecular Weight: 265.9 g/mol
Melting Point: Around 988°C (melts with decomposition)
Solubility: Soluble in water, insoluble in alcohol
pH (1% solution): 10.0 - 10.8
Boiling Point: Decomposes before boiling
Density: 2.45 g/cm³
Vapor Pressure: Not applicable
Flash Point: Not flammable
Chemical Stability: Remains stable under normal temperatures and recommended storage conditions. Product absorbs moisture from air.
Conditions to Avoid: Exposure to moisture, strong heat, acids.
Incompatible Materials: Strong acids, magnesium, oxidizing agents.
Hazardous Decomposition Products: Phosphorus oxides may form on thermal decomposition.
Polymerization: Does not polymerize.
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Health Effects: Eye contact causes irritation, redness, watering. Prolonged skin exposure can cause mild dermatitis. Swallowing may result in gastrointestinal upset, nausea or diarrhea. Inhalation of dust leads to coughing, throat or respiratory irritation.
Chronic Effects: Long-term exposure to dust may aggravate respiratory issues.
Acute Toxicity: LD50 (oral, rat) approximately 7100 mg/kg.
Carcinogenicity: Not listed as carcinogenic in IARC, NTP or OSHA databases.
Other Data: No evidence of reproductive toxicity or sensitization.
Ecotoxicity: Toxic to aquatic organisms at high concentrations. Increases phosphate levels in water, leading to possible algal blooms and oxygen depletion.
Persistence and Degradability: Inorganic salt, does not biodegrade but dissociates in water.
Bioaccumulative Potential: Low — does not significantly build up in organisms.
Mobility in Soil: Migrates readily with water; can contaminate surface water and groundwater.
Other Adverse Effects: Risk of ecosystem imbalance if released in quantity into lakes or streams.
Waste Disposal Methods: Collect in suitable, labeled containers and dispose at an approved waste facility in accordance with local, regional, and national regulations. Do not allow into sewers or natural waterways.
Contaminated Packaging: Clean thoroughly before recycling or disposal, or handle as hazardous waste if cleaning not possible.
Special Precautions: Follow site guidelines for phosphate-containing material disposal to avoid contributing to environmental phosphate load.
UN Number: Not classified as hazardous for transport under most regulations.
Proper Shipping Name: Sodium Pyrophosphate
Transport Hazard Class: Not dangerous
Packing Group: Not applicable
Labels Required: None specified for land, sea, or air transport.
Special Transport Precautions: Secure packaging, protect from moisture, avoid rough handling to prevent container damage.
OSHA Status: Not specifically regulated, but subject to general workplace dust and chemical safety standards.
TSCA Status: Listed on the Toxic Substances Control Act inventory.
SARA Title III Sections 311/312: Standard hazard categories: immediate (acute) health hazard
SARA Title III Section 313: Not subject to reporting
EU Regulation: Listed in EINECS/ELINCS, not classified as dangerous
Other Regulations: Subject to food additive regulations if used in food processing (E450 (iii)), and phosphate use controls in wastewater treatment where phosphate discharge limits apply.
