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Product Name: Tripotassium Orthophosphate
Chemical Formula: K3PO4
CAS Number: 7778-53-2
EC Number: 231-907-1
Recommended Use: Water treatment, fertilizer blends, and a buffering agent in chemical processes
Manufacturer Information: Supplier or manufacturer contact address, emergency telephone number, and email for technical support
Synonyms: Potassium phosphate tribasic, tribasic potassium phosphate
Molecular Weight: 212.27 g/mol
Other Identifiers: Clear labeling required for container handling and transport
Globally Harmonized System Classification: Eye Irritation Category 2A, Skin Irritation Category 2
Signal Word: Warning
Hazard Statements: Causes serious eye irritation, may cause skin irritation, dust may cause respiratory irritation
Precautionary Statements: Wear eye/face protection, wash hands thoroughly after handling, avoid breathing dust, use only outdoors or in well-ventilated area
Pictograms: Exclamation mark (irritant)
Routes of Exposure: Inhalation, ingestion, skin, eye contact
Potential Health Effects: Eye redness and pain, sneeze or cough by inhalation, skin dryness or cracking on prolonged contact
Environmental Effects: Limited impact on aquatic life at standard use concentrations, avoid release to waterways
Chemical Name: Tripotassium Orthophosphate
Concentration: 98–100% by weight
CAS Number: 7778-53-2
EINECS Number: 231-907-1
Impurities: Minor traces of related phosphate salts or potassium salts could be present, but should remain below 2% combined
Additional Information: Highly soluble, free-flowing crystalline or granular product
Eye Contact: Immediately flush eyes with plenty of water for at least 15 minutes, lift eyelids occasionally, remove any contact lenses as soon as possible
Skin Contact: Remove contaminated clothing, wash skin using soap and plenty of water, seek medical advice if irritation persists
Inhalation: Move person to fresh air, assist breathing if necessary, keep comfortable, seek medical help if symptoms do not improve
Ingestion: Rinse mouth thoroughly, drink several glasses of water, never give anything by mouth to an unconscious person, obtain medical attention if feeling unwell or symptoms develop
Most Important Symptoms: Redness, pain, or watering of eyes, dry or cracked skin, sore throat or coughing
Advice for Physicians: Treat symptoms, no specific antidote
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide for surrounding fire
Unsuitable Media: No data on substances that worsen firefighting efforts for this material
Specific Hazards: Not combustible, may release irritating or toxic fumes including oxides of phosphorus and potassium when heated
Protective Equipment for Firefighters: Wear self-contained breathing apparatus and full protective clothing
Unusual Fire and Explosion Hazards: Product does not ignite or support combustion but may react vigorously with strong acids
Decomposition Products: Potassium oxides, phosphorous oxides, irritating vapors
Personal Precautions: Wear dust mask, gloves, goggles, and avoid contact with eyes and skin during clean-up
Environmental Precautions: Stop product from entering waterways or sewers, sweep up spills without generating dust, avoid discharge into the environment
Containment Methods: Collect spilled product and place in suitable labeled waste container, clean area with plenty of water
Methods for Cleanup: Sweep or vacuum up material, use damp cloth to wipe surfaces, ventilate area before reuse
Special Emergency Advice: Isolate area, restrict non-essential personnel, wash exposed clothing before reuse
Handling: Handle with care to avoid dust generation, keep containers tightly closed, use local exhaust or general ventilation
Protection During Handling: Personal protective equipment including gloves, goggles, and dust mask recommended
Advice on Safe Storage: Store in a dry, cool, well-ventilated area, keep away from acids and moisture, use only corrosion-resistant containers
Incompatibilities: Avoid mixing with strong acids, strong oxidizers, or aluminum items
Shelf Life: Product stability does not decrease significantly if stored properly in sealed containers
Storage Temperature: Store at room temperature, avoid excessive heat and humidity
Packaging Materials: Use polyethylene-lined drums or bags, avoid paper sacks in damp conditions
Occupational Exposure Limits: No official limit values but recommended threshold limit value for nuisance dust at 10 mg/m³ (inhalable)
Engineering Controls: Provide adequate general and local exhaust ventilation to minimize airborne concentrations
Personal Protective Equipment: Use chemical-splash goggles, dust-proof gloves, long-sleeve clothing
Respiratory Protection: Dust mask or respirator in poorly ventilated environments or high-dust areas
Hygiene Measures: Wash hands and face after handling, change out of contaminated clothing as soon as possible
Environmental Exposure Controls: Limit discharge to the environment, use containment facilities if possible
Appearance: White crystalline powder or granules
Odor: Odorless
Odor Threshold: Not applicable
pH (1% Solution): 11.5 – 12.5 (alkaline)
Melting Point: 1340°C (2444°F)
Boiling Point: Decomposes before boiling
Solubility in Water: 187 g/L at 25°C
Density: Approx. 2.56 g/cm³
Vapor Pressure: Not volatile
Partition Coefficient: Not relevant
Flash Point: Not flammable
Explosive Limits: Not applicable
Autoignition Temperature: Not applicable
Viscosity: Not relevant
Reactivity with Water: Readily soluble, forms alkaline solutions
Evaporation Rate: Not volatile
Color: White
Chemical Stability: Stable under recommended storage conditions and normal handling
Conditions to Avoid: Excessive moisture, high humidity, contact with incompatible materials especially acids
Materials to Avoid: Strong acids, aluminum, magnesium, ammonium salts
Hazardous Decomposition: Will not decompose under ordinary conditions but may yield potassium oxides and phosphorus oxides when heated
Polymerization: Will not occur
Other Risks: May evolve heat during dissolution
Acute Oral Toxicity (LD50): >5000 mg/kg (rat, oral)
Acute Dermal Toxicity (LD50): >2000 mg/kg (rabbit, dermal)
Ingestion Effects: Possible gastrointestinal discomfort, nausea, vomiting in case of large quantities
Inhalation Effects: Dust may cause respiratory tract irritation, coughing, sneezing
Skin Effects: Repeated or prolonged exposure may cause dry or cracked skin
Eye Effects: Redness, watering, intense irritation
Carcinogenicity: Not known to be carcinogenic
Chronic Effects: No evidence of chronic systemic toxicity in humans from occupational exposures
Other Health Effects: Prolonged high intake could disturb electrolyte balance in sensitive people
Persistence and Degradability: Inorganic salt, dissolves in water to form harmless ions, not bioaccumulative
Aquatic Toxicity: Not acutely toxic, can cause nutrient enrichment in water (eutrophication) if released in large quantities
Terrestrial Toxicity: No chronic impact on terrestrial plants or organisms if used responsibly
Bioaccumulative Potential: Product does not bioaccumulate
Mobility in Soil: Highly mobile in aqueous phases, leaches in soil
Other Ecological Impacts: Spillage into waterways can encourage algal blooms due to phosphate content, dilute and control discharge
Disposal Methods: Dispose of contents and container in accordance with all local, regional, and national regulations
Waste Treatment: Chemical can be landfilled in accordance with local requirements or reused where possible
Hazardous Waste: Not classified as hazardous under most waste regulations
Empty Containers: Rinse thoroughly before discarding or recycling, do not reuse drum or bag for unrelated material
Special Precautions: Avoid release to environment, prevent entry into drains or natural waters
UN Number: Not regulated as dangerous goods
Proper Shipping Name: Tripotassium Orthophosphate
Transport Hazard Class: Not classified as hazardous
Packing Group: Not applicable
Labeling Requirements: General chemical label, not a dangerous goods hazard symbol
Environmental Hazards: Not a marine pollutant
Special Transport Precautions: Protect from moisture, keep sealed during transport, use compatible containers, avoid spillage
Workplace Safety: Covered by chemical safety regulations for handling and use in occupational settings
Inventory Status: Listed in main global chemical inventories, including REACH (EU), TSCA (US), DSL (Canada), AICS (Australia), ENCS (Japan)
EPA Regulation (US): Not a hazardous substance under SARA Title III
OSHA Status: Not specifically regulated as a hazardous substance
EU Classification: Regulated under CLP, requires hazard communication for irritant effects
Local Regulations: Follow all applicable state, municipal, and national standards for worker health and safety; ensure compliance with any phosphate discharge limits for water and soil
Label Requirements: Product labeling must reflect hazard identification, precautionary statements, and handling instructions per latest regulations
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
