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Chemical Name: Ammonium sodium phosphate tetrahydrate
Common Uses: Laboratory chemical, fertilizer component, reagent for educational settings
Synonyms: Ammonium sodium hydrogen phosphate tetrahydrate
CAS Number: 13084-17-0
Appearance: Colorless to white crystalline solid
Main Risks: Can cause eye, skin, and respiratory irritation; dust may provoke coughing and mild symptoms on exposure
Hazard Symbols: None officially assigned in most regulations, though sensible handling is still wise
Routes of Exposure: Dust inhalation, skin contact, eye splashes, or accidental ingestion
Chronic Effects: Repeated or prolonged exposure to dust may cause respiratory irritation
Principal Component: Ammonium sodium phosphate tetrahydrate
Chemical Formula: (NH4)NaHPO4·4H2O
Purity: Typically above 98% in laboratory supply
Impurities: Trace levels of related phosphates and residual water depending on storage
Inhalation: Remove to fresh air, calm breathing, seek medical attention if symptoms persist
Skin Contact: Wash thoroughly with soap and water
Eye Contact: Rinse cautiously with water, avoid rubbing, consider seeking medical care
Ingestion: Rinse mouth, do not induce vomiting, seek medical advice for larger amounts
Suitable Extinguishing Media: Water spray, foam, dry chemical, or carbon dioxide as practical
Combustion Hazards: Material is not combustible; if involved in a fire, phosphorous oxides and ammonia may evolve
Protective Equipment: Standard turnout gear; avoid inhaling dust or fumes
Special Instructions: Move containers away from fire if safe, limit runoff into drains
Personal Precautions: Wear gloves and safety goggles; avoid breathing dust
Clean-Up Methods: Sweep up residue without generating dust, transfer into a suitable container for disposal
Environmental Precautions: Prevent large releases from entering waterways; small spills dilute with water and rinse away under code-compliant disposal
Safe Handling Tips: Minimize dust, use in a well-ventilated area
Storage Conditions: Keep in a tightly closed container, store in a cool, dry place, away from incompatible chemicals such as strong acids
Hygiene Measures: Wash hands after use, keep work clothes separate
Ventilation: Use local exhaust ventilation where possible
Personal Protective Equipment: Chemical-resistant gloves, laboratory coat, safety goggles; use a dust mask for higher dust conditions
Occupational Exposure Limits: No specific regulatory limits for this compound; follow local guidelines for nuisance dust
Appearance: White crystals
Odor: Odorless
Solubility: Easily soluble in water
Melting Point: Decomposes on heating
pH in Solution: Slightly alkaline due to phosphate
Vapor Pressure: Not considered volatile
Chemical Stability: Stable under ordinary conditions if kept dry and uncontaminated
Hazardous Reactions: Hydrolyzes slowly over time to form ammonia and other phosphate derivatives
Conditions to Avoid: Moisture, high heat, contact with acids
Incompatible Materials: Strong acids and bases, oxidizing agents
Hazardous Decomposition Products: Ammonia, phosphorous oxides under extreme heating
Acute Toxicity: Oral or skin exposure at moderate laboratory levels has not shown strong toxicity in animal studies; significant overdoses could cause nausea or discomfort
Irritation: Prolonged dust contact may irritate eyes, lungs, or skin
Long-term Exposure: Chronic effects unlikely in normal use, but always best to avoid unnecessary contact
Carcinogenicity: Not listed as carcinogenic by regulatory agencies
Aquatic Effects: In significant quantities, phosphates contribute to eutrophication in lakes or streams
Persistence and Degradability: Breaks down in soil and water; ammonia may be released during decomposition
Bioaccumulation: No tendency to bioaccumulate known
Other Considerations: Diluted solutions release phosphate ions that impact water ecosystems, so avoid large discharges
Recommended Disposal: Collect residue, avoid dumping large quantities in drains
Regulatory Compliance: Dispose through licensed chemical waste vendors following environmental regulations
Additional Suggestions: Small quantities in dilute solution may be discharged according to local requirements
Transportation Regulation: Transported as a non-hazardous chemical, no special precautions required beyond avoiding container leaks
Proper Packaging: Use sturdy, labeled bags or containers
Spillage: Clean up using gloves, limit dust generation en route
Local and International Regulation: Not classified as a hazardous chemical under most regulations
Labeling Requirements: Standard labeling for laboratory reagents or research chemicals usually applies
Worker Protection: OSHA and similar agencies require appropriate PPE for handling laboratory chemicals, including this phosphate
