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Chemical Name: Ammonium Dihydrogen Phosphate
Synonyms: Monoammonium Phosphate, MAP, Ammonium Phosphate Monobasic
CAS Number: 7722-76-1
Molecular Formula: NH₄H₂PO₄
Molecular Weight: 115.03 g/mol
Product Use: Fertilizer, fire retardant, food additive, lab reagent
Supplier Contact Information: Company name and address, emergency phone number, and technical contact, found on manufacturer label
Recommended Use Restrictions: Industrial, laboratory, and commercial applications only
GHS Classification: Not classified as hazardous under GHS
Pictograms: No pictograms required
Signal Word: Not applicable
Hazard Statements: Not expected to produce significant health effects in standard use; dust can irritate eyes, upper respiratory tract
Precautionary Statements: Avoid breathing dust, wash hands after handling, use in a well-ventilated area
Potential Health Effects: Eye and skin irritation from dust exposure possible, respiratory tract irritation after inhalation, ingestion may cause mild gastrointestinal upset
Chemical Identity: Ammonium Dihydrogen Phosphate
Concentration: 98–100%
Impurities: May contain trace amounts of other phosphate salts, water, but no significant hazardous impurities
EC Number: 231-764-1
Other Additives: No relevant stabilizers or solvents reported
Inhalation: Move person to fresh air, keep comfortable, seek medical attention if breathing problems persist
Eye Contact: Rinse opened eye with plenty of water for several minutes; remove contact lenses if present and easy to do
Skin Contact: Wash skin thoroughly with soap and water; remove contaminated clothing and wash before reuse
Ingestion: Rinse mouth; drink water to dilute, do not induce vomiting, seek medical advice for persistent discomfort
Urgent Medical Attention: Not generally required, but symptoms lasting more than a few minutes deserve medical assessment
Suitable Extinguishing Media: Water spray, dry chemical, foam, or carbon dioxide
Unsuitable Media: None known for this substance
Specific Hazards: Product is not flammable or combustible; in fire, may produce ammonia, phosphorus oxides
Protective Equipment: Firefighters should use self-contained breathing apparatus and protective clothing
Special Procedures: Move containers from fire area if safely possible; use water to cool containers
Personal Precautions: Avoid dust formation, use personal protective equipment (gloves, goggles, dust mask)
Environmental Precautions: Prevent release to sewers or surface waters
Cleanup Methods: Carefully sweep up or vacuum spilled material to avoid raising dust, store material in appropriate containers for disposal or reuse
Decontamination: Wash spill area with plenty of water after removal of solid material
Handling: Avoid creating airborne dust, wear suitable protective equipment, wash hands before eating or drinking
Storage Conditions: Store in tightly closed containers in a cool, dry, well-ventilated area
Incompatible Substances: Acids, bases, strong oxidizers, strong reducing agents
Other Precautions: Store away from food and beverages; prevent moisture entry to storage containers
Exposure Limits: No specific occupational exposure limits set for this compound
Engineering Controls: Use local exhaust ventilation if dust generation occurs
Personal Protective Equipment: Wear chemical safety goggles, gloves (rubber, nitrile), dust mask or respirator for high concentrations/dust, protective clothing
Hygiene Measures: Wash hands after handling, remove and clean contaminated clothing before reuse
Environmental Controls: Avoid discharge to the environment, implement dust control procedures
Appearance: White crystalline powder
Odor: Odorless
pH (1% solution): Approx. 4.2–4.8
Melting Point: Decomposes above 190°C
Boiling Point: Not applicable (decomposes before boiling)
Solubility: 40 grams per 100 mL water at 20°C
Relative Density: About 1.8 (water = 1)
Vapor Pressure: Not applicable
Other Properties: Non-volatile, stable under ambient conditions, non-flammable
Chemical Stability: Stable under recommended storage and handling
Hazardous Reactions: Contact with acids creates toxic gases (ammonia, phosphorus oxides)
Incompatible Materials: Strong acids, strong oxidizing agents, alkalis
Decomposition Products: Ammonia, phosphorus oxides, nitrogen oxides under heating
Other Information: Moisture may cause caking and loss of free flow ability
Acute Oral Toxicity (LD50): >2000 mg/kg (rat), low toxicity
Acute Dermal Toxicity: Data limited, not expected to be acutely toxic
Acute Inhalation Toxicity: Low inhalation toxicity, dust may irritate mucous membranes
Skin Corrosion/Irritation: Mild, possible irritation in sensitive individuals
Serious Eye Damage/Irritation: Dust contact can cause mild to moderate irritation
Respiratory Sensitization: Not classified as a respiratory sensitizer
Carcinogenicity: Not listed as carcinogenic
Mutagenicity: No evidence of genotoxicity
Other Chronic Effects: Prolonged exposure to high dust concentrations might aggravate lung conditions
Ecotoxicity: Moderate hazard to aquatic environments, high nutrient concentrations can cause eutrophication in water bodies
Persistence and Degradability: Dissolves easily in water, phosphate and ammonium ions persist in the environment as nutrients
Bioaccumulative Potential: Not expected to bioaccumulate
Mobility in Soil: High mobility due to good water solubility, especially in acidic conditions
Other Adverse Effects: Contributes to algal bloom when released into surface water
Waste Disposal Methods: Dispose in accordance with local, regional, and national regulations for non-hazardous chemical waste
Disposal of Containers: Rinse empty containers before disposal or recycling; do not reuse containers for food or drink
Environmental Precautions: Prevent bulk quantities from entering waterways
Waste Classification: Not a hazardous waste under US RCRA or EU directives
UN Number: Not regulated for transport
Transport Hazard Class: Not dangerous for road, rail, air, or sea transport
Packing Group: Not assigned
Special Precautions: Protect against moisture, avoid breakage of packaging during transit
Labeling Requirements: Not classified as a hazardous material for transportation
TSCA (US): Listed
REACH (EU): Registered
WHMIS (Canada): Not classified as hazardous
Other International Regulations: Not on restricted lists in GHS-aligned regions
SARA Title III (Sections 302/304, 311/312, 313): Not subject to reporting
Other Regulatory Notes: No special restrictions, but local chemical or fertilizer laws may apply for bulk use or storage
