Product Name: Monosodium Phosphate Anhydrous (MSP-A)
Chemical Formula: NaH2PO4
Synonyms: MSP-A, Sodium Dihydrogen Phosphate, Monobasic Sodium Phosphate
CAS Number: 7558-80-7
Recommended Use: Buffering agent, food additive, water treatment, chemical manufacturing
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Classification: Not classed as hazardous under normal conditions; can irritate eyes and skin
Physical Hazards: Slight dust hazard if handled or stored without protection
Health Hazards: Contact with large quantities of dust or prolonged exposure may cause respiratory irritation, redness, or discomfort
Environmental Hazards: Large spillages may upset aquatic life by altering water pH; small amounts typically dissipate
Chemical Name: Monosodium Phosphate Anhydrous
CAS Number: 7558-80-7
Concentration: >99% by weight
Impurities: Trace moisture, minor sodium pyrophosphate possible, heavy metals within regulatory thresholds
Inhalation: Move to fresh air at once, rinse mouth, blow nose to clear dust; seek medical help if symptoms follow
Skin Contact: Wash with plenty of water and mild soap; remove contaminated clothing
Eye Contact: Flush eyes gently with running water for 15 minutes holding eyelids apart; get medical advice if irritation persists
Ingestion: Rinse mouth, drink water to dilute; do not induce vomiting without medical direction, seek medical help promptly if unwell or large amounts ingested
Suitable Extinguishing Media: Water spray, dry chemical, carbon dioxide, foam
Unsuitable Media: No specific restrictions but avoid methods that raise dust
Hazardous Combustion Products: Phosphorus oxides, sodium oxides in a fire
Firefighter Protection: Use self-contained breathing apparatus, wear full gear in case of large fire; avoid inhalation of decomposition gases
Flammability: Non-flammable solid
Personal Precautions: Wear dust mask, goggles, and gloves; avoid breathing dust or letting it touch exposed skin
Environmental Precautions: Prevent release to waterways and drains in large volumes, scoop up to avoid runoff
Methods of Cleanup: Sweep or shovel spilled powder into sealed containers for reuse or disposal, rinse spill area thoroughly
Handling: Keep containers tightly closed, use local exhaust or ventilation to keep dust down, always handle in well-aired places, avoid mixing with strong acids
Storage: Store in a cool, dry spot, protect from moisture; keep away from incompatible substances such as strong alkalis and oxides; check for leaks, avoid stacking containers too high
Occupational Exposure Limits: No specific OSHA or ACGIH threshold for this compound; dust limits apply
Engineering Controls: Use extraction fans or local ventilation near work zone
Respiratory Protection: Disposable dust masks recommended if working with bulk powder
Eye Protection: Safety glasses or chemical goggles
Skin Protection: Wear gloves, closed shoes, and long sleeves
Hygiene: Wash hands before eating or after handling, keep work clothes separate from casual attire
Appearance: White, odorless crystalline powder
Solubility: Easily dissolves in water
Melting Point: ~190°C (decomposes)
Density: Around 2.36 g/cm³
pH (1% Solution): About 4.2–4.6
Vapor Pressure: Not volatile
Odor Threshold: Not applicable
Boiling Point: Not applicable (decomposes before boiling)
Other Properties: Hygroscopic, soaks up moisture from air, forms lumps over time
Stability: Stable in sealed containers in dry air
Reactivity: Reacts with strong bases, acids; releases phosphoric acid fumes at high temperatures
Hazardous Decomposition: Under fire or strong heat, emits phosphorus oxides, sodium fumes
Incompatible Materials: Strong alkalis, oxidizers, acids
Polymerization: Will not polymerize
Acute Effects: Non-toxic at low doses typical for food use; may irritate skin, eyes, or airways in dust form
Chronic Effects: Not known to cause cancer, genetic defects, or fertility harm; heavy, prolonged exposure may affect mineral balance in the body
Routes of Entry: Inhalation of dust, skin or eye contact, accidental ingestion
Symptoms: Throat dryness, coughing, skin redness, watery eyes possible after significant exposure
Mobility: Mixes rapidly in water, spreads into soil and water bodies
Persistence and Degradability: Phosphate breaks down, re-enters natural phosphorus cycle
Bioaccumulation: Does not build up in wildlife
Aquatic Toxicity: Large discharges may trigger algal growth, disturb aquatic ecosystems by shifting balance of nutrients
Other Effects: Elevated phosphate in untreated releases can disrupt wastewater systems; small spills generally considered minor risk
Waste Treatment: Collect waste and contaminated packaging in secure containers, minimize dust release
Disposal Method: Hand over to authorized waste collection; landfill or incinerate following local requirements
Environmental Precaution: Diluted solutions should be neutralized before sewering if allowed, avoid large volume disposal in drains
Packaging Disposal: Rinse empty bags or containers, recycle or dispose based on local laws
UN Number: Not regulated for transport
Transport Hazard Class: Not classified as hazardous
Packing Group: None
Labels/Placards: No special labeling
Special Transport Precautions: Protect from damp, avoid bag rupture by secure stacking; handle with care to reduce dust during loading and unloading
Regulatory Status: Approved for food, water, industry in many countries; always check for latest updates
Safety Standards: Complies with United States EPA, FDA, and European food safety codes for food/pharma exposures
Worker Protection: OSHA workplace hazard communication rules apply where dust or bulk material handled
Other Laws: Subject to regional laws for phosphates and chemical products, local discharge limits may vary
