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Product Name: Diammonium Hydrogen Phosphate
Chemical Formula: (NH4)2HPO4
CAS Number: 7783-28-0
Synonyms: Ammonium hydrogen phosphate, DAP
Recommended Use: Fertilizer, flame retardant, food additive
Manufacturer: Industrial chemical and fertilizer suppliers
Emergency Contact: Check local supplier or poison center for immediate support
Classification: Not classified as hazardous under GHS guidelines
Health Hazards: May cause eye and skin irritation from direct contact, inhalation could irritate respiratory system
Environmental Hazards: Slight risk for aquatic life with large accidental releases
Label Elements: No pictogram or signal word required under standard regulations
Precautionary Statements: Avoid inhaling dust or contact with eyes and skin, keep out of waterways
Chemical Name: Diammonium hydrogen phosphate
Common Name: DAP
Content: 98-100% by weight
Impurities: Minor traces of phosphate co-products, ammonium compounds may be present
Inhalation: Move exposed person to fresh air, seek medical attention with signs of breathing trouble
Skin Contact: Wash with soap and water, remove contaminated clothing
Eye Contact: Rinse eyes gently with water for several minutes, remove contact lenses if present and possible, continue rinsing
Ingestion: Rinse mouth, drink water, seek medical care if unwell or symptoms persist
Suitable Extinguishing Media: Use water spray, dry chemical powder, carbon dioxide
Specific Hazards: Product does not burn, but releases ammonia and oxides of nitrogen under intense fire
Special Equipment: Wear self-contained breathing apparatus and protective clothing
Combustion Products: Ammonia, phosphorus oxides, nitrogen oxides
Personal Precautions: Ventilate area, avoid dust, wear protective equipment
Environmental Precautions: Prevent material from entering waterways and drains
Cleanup Methods: Sweep up and collect in suitable containers for disposal, wash spill site after removal
Safe Handling: Minimize dust generation, avoid contact with eyes and skin, use only in well-ventilated areas
Storage Conditions: Store in cool, dry, and well-ventilated place, keep containers tightly sealed, keep away from incompatible materials like strong acids
Incompatible Materials: Strong acids, alkaline substances, oxidizers
Engineering Controls: Local exhaust ventilation or general ventilation to control dust levels
Personal Protective Equipment: Eye protection (goggles), gloves, protective clothing, dust masks or respirators if dust is present
Hygiene Measures: Wash hands after handling, no eating, smoking, or drinking during use
Appearance: White crystalline powder
Odor: Slight ammonia smell
pH (10% solution): 7.5–8.5
Melting Point: Decomposes above 155°C
Boiling Point: Not applicable
Solubility: Soluble in water
Vapor Pressure: Not significant at ordinary temperatures
Relative Density: 1.62 (water = 1)
Bulk Density: 0.96–1.03 g/cm³
Flash Point: Not flammable
Chemical Stability: Stable under recommended storage and handling conditions
Reactivity: No dangerous reactions known under normal conditions
Hazardous Decomposition Products: Ammonia, nitrogen and phosphorus oxides if heated sharply
Conditions to Avoid: Exposure to moisture, high heat, contact with incompatible materials
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Effects: Irritation to respiratory tract, eyes, and skin
Chronic Effects: No reliable evidence of mutagenic or carcinogenic effects from workplace exposure
Sensitization: Not expected to trigger allergic symptoms
Toxicity Data: Oral LD50 (rat): 7900 mg/kg
Aquatic Toxicity: May promote algal growth in surface waters through nutrient enrichment
Persistence and Degradability: Dissolves and disperses in water, contributes phosphate and ammonium ions
Bioaccumulative Potential: Not expected to build up in living organisms
Mobility: Highly mobile in soil, moves with water
Waste Handling: Follow all local, regional, national, and international regulations
Methods: Preferably collect, recycle or re-use if practical; otherwise, dispose in landfill or incineration by licensed contractor
Environmental Precautions: Do not allow material or rinsings to enter drains or water bodies
UN Number: Not regulated
Transport Hazard Class: Not classified as hazardous
Proper Shipping Name: Diammonium hydrogen phosphate
Packing Group: Not assigned
Special Precautions for User: Secure packaging to avoid leaks or dust generation during transit
Chemical Inventory: Listed in global chemical inventories (including TSCA, EINECS, DSL)
Regulatory Status: Not classified as a hazardous material under OSHA, GHS, or major international regulations
Labeling Requirements: Standard industrial labeling, no hazard symbols required
Other Regulations: Subject to specific workplace and environmental release rules, depending on local laws
