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Chemical Name: Aluminum Potassium Sulfate Dodecahydrate
Common Name: Potassium Alum
Synonyms: Alum, Potassium Aluminum Sulfate, Alum Stone
Chemical Formula: KAl(SO4)2·12H2O
Physical Form: Colorless or white crystalline solid
Odor: Odorless
Recommended Use: Used in water purification, dyeing, tanning, baking, and as astringent in medicine
Main Hazards: Can cause eye and skin irritation, may irritate respiratory tract or digestive system if dust or particles are inhaled or ingested
Environmental Impact: Not classified as environmentally hazardous but overuse or improper disposal can disrupt soil chemistry and water pH
Chronic Exposure: Long-term exposure not linked to organ toxicity, but repeated contact still leads to irritation
Main Component: Potassium Alum (Aluminum Potassium Sulfate Dodecahydrate)
Chemical Content: Minimum 99% purity in most commercial forms
Impurities: May contain trace elements depending on manufacturing process; these are typically below hazardous levels
CAS Number: 7784-24-9
Eye Contact: Rinse immediately and thoroughly with water for several minutes, hold eyelids apart, seek medical advice if irritation persists
Skin Contact: Wash off with plenty of water and soap, remove contaminated clothing, seek medical attention only if symptoms develop
Inhalation: Move to fresh air, help the person to breathe normally, consult a physician if symptoms like coughing or difficulty breathing do not subside
Ingestion: Rinse mouth with water, drink water to dilute, do not induce vomiting; seek medical help if large quantities are swallowed or symptoms develop
Suitable Extinguishing Media: Use water spray, dry chemical powder, foam, or carbon dioxide for surrounding materials as product itself is non-flammable
Special Hazards from Fire: Heating may release sulfur oxides, potassium oxides, aluminum oxides
Advice for Firefighters: Use protective equipment including self-contained breathing apparatus, prevent runoff from entering water systems
Personal Precautions: Avoid dust formation, use personal protective equipment such as gloves and goggles
Environmental Precautions: Prevent spill from entering drains, waterways, or soil
Spill Cleanup Methods: Collect using dry methods (shovel or sweep), place in suitable container for proper disposal, ventilate area as required
Handling Precautions: Wear appropriate personal protective gear, minimize dust generation, work in well-ventilated area
Storage Requirements: Store in a cool, dry place away from incompatible substances such as strong acids and bases, keep container tightly closed
Special Storage Measures: Avoid contact with moisture and prevent exposure to direct sunlight to maintain product quality
Engineering Controls: Good general ventilation typically suffices, use local exhaust if dusts are generated
Respiratory Protection: Use dust mask or respirator if airborne particles exceed recommended exposure limits
Skin Protection: Wear chemical-resistant gloves
Eye Protection: Use safety goggles to prevent exposure to dust
Hygiene Measures: Avoid eating, drinking, or smoking while handling, wash hands thoroughly after use
Appearance: Clear to white crystalline solid
Solubility: Soluble in water, insoluble in alcohol
Melting Point: Decomposes at about 92°C, loses water of crystallization
Density: About 1.73 g/cm³
pH: Slightly acidic in water solution, typically between 3.0 to 3.5 for a 5% solution
Chemical Stability: Stable under normal handling and storage conditions
Reactive Substances: Reacts with strong acids and bases, releases irritating fumes when heated
Decomposition Products: Sulfur oxides, potassium oxides, aluminum oxides if heated to decomposition
Acute Toxicity: Low oral toxicity, may cause gastrointestinal irritation if large amounts are ingested
Skin Irritation: Possible with prolonged or repeated contact
Eye Irritation: Redness, discomfort, blurred vision can develop
Sensitization: Not classified as a skin or respiratory sensitizer
Carcinogenicity: Not listed as carcinogen by agencies such as IARC or NTP
Chronic Effects: No evidence for chronic health risks under normal conditions of use
Aquatic Toxicity: Generally low, but excessive release can disrupt aquatic environments by altering pH balance
Persistence and Degradability: Dissolves in water, does not bioaccumulate
Soil Impact: Large or repeated spills may alter local soil chemistry
Bioaccumulation: Not significant in typical usage scenarios
Waste Treatment Methods: Dispose in accordance with local, regional, and national regulations
Product Disposal: Small amounts can often go to landfill after neutralization and dilution, but avoid large-scale dumping in watercourses or sewers
Recommendation: Consult environmental authorities for best disposal practices, especially for large quantities
UN Number: Not regulated as hazardous for transport
Proper Shipping Name: Aluminum Potassium Sulfate Dodecahydrate
Transport Hazard Class: Non-hazardous according to most international guidelines
Packing Group: Not classified
Special Precautions: Keep dry during transportation, avoid container damage to prevent spillage
Relevant Regulations: Not listed as hazardous under major chemical regulations such as OSHA, TSCA, or REACH
Workplace Exposure Limits: Not established for this compound in most jurisdictions
Label Requirements: Basic hazard symbols and safety advice suggested in workplace settings
