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Product Name: Aluminium Ammonium Sulfate
SYNONYMS: Ammonium alum, Diammonium alum, Aluminum ammonium dodecahsydrate
Chemical Formula: NH4Al(SO4)2·12H2O
CAS Number: 7784-26-1
Recommended Uses: Water purification, dye fixative, paper sizing, food additive, laboratory reagent, leather tanning
Manufacturer Details: Industrial chemical suppliers; often distributed by global chemical supply companies with local handling offices
Emergency Contact Information: Refer to local poison control center and regional emergency numbers listed on supplier documents
Hazard Classification: GHS/OSHA: Irritant; Eye irritation, Skin irritation, Possible respiratory irritant
Pictograms: Exclamation mark symbol for irritants
Signal Word: Warning
Hazard Statements: Causes skin irritation, causes serious eye irritation, may cause respiratory irritation if dust is inhaled
Precautionary Statements: Avoid breathing dust, wear protective gloves and eye protection, wash contaminated skin thoroughly after handling, use only outdoors or in well-ventilated areas, seek attention if exposed or concerned
Potential Health Effects: Contact with eyes may lead to redness and pain; contact with skin can bring on mild itching, dryness, or rash; inhalation of dust triggers coughing and throat discomfort; ingestion may cause gastrointestinal irritation such as nausea, vomiting, or diarrhea
Chemical Name: Aluminium Ammonium Sulfate Dodecahydrate
CAS Number: 7784-26-1
Purity: Typically greater than 98% in commercial supplies
Impurities: May contain trace metals and silicate as residuals from manufacturing, though present at concentrations below regulatory concern for toxics
Other Components: Water of hydration (12H2O) makes up significant mass of each crystalline structure
Eye Contact: Begin immediate irrigation with clean water or saline, keeping eyelids open and rolling the eye; continue with at least 15 minutes of flushing; medical evaluation strongly advised to rule out corneal injury or prolonged discomfort
Skin Contact: Rinse skin thoroughly with plenty of water, remove any contaminated clothing, cleanse affected areas with soap and water if possible; persistent irritation justifies a visit to healthcare provider
Inhalation: Remove individual to open air or an area with fresh circulating air; assist breathing as needed, keep person comfortable and monitor for delayed symptoms like coughing or shortness of breath; consult emergency personnel if symptoms escalate
Ingestion: Rinse mouth with plenty of clean water, drink water to dilute swallowed material, avoid inducing vomiting unless directed by a medical professional, seek medical advice immediately with details on quantity ingested
Most Important Symptoms and Effects: Noted for persistent burning in eyes, rash, dry or itchy skin, sore throat, mild stomach pain or discomfort; complications rare except following large-dose ingestion or prolonged exposure
Notes to Physician: Address symptoms as they present; support respiratory functions and manage dehydration in severe cases; no specific antidote identified
Suitable Extinguishing Media: Water spray, foam, dry chemical powder, carbon dioxide all apply, avoid straight stream water if electrical fire is involved
Specific Hazards Arising from Chemical: Product does not burn, though decomposition under intense heat may give off toxic fumes such as sulfur oxides, ammonia, and aluminum oxides; fires close to stored stock may pose risk to containers
Special Protective Equipment for Firefighters: Full turnout gear, SCBA required due to smoke and possible release of fumes; chemical-resistant boots and gloves recommended for direct involvement
Further Information: Cooling exposed containers reduces risk of rupture, contaminated runoff must be limited from entering natural waterways or municipal sewers
Personal Precautions: Wear approved dust mask, safety goggles, and gloves; shut off ignition sources around large spills; ensure area is well ventilated
Environmental Precautions: Take immediate steps to block run-off into drains, surface water, or soil to prevent localized contamination
Methods for Cleanup: Sweep up spilled solid material gently to reduce dust generation, collect into secure, labeled drums or containers; flush area with plenty of water, collect washings for proper treatment
Additional Recommendations: Alert environmental health and safety teams about significant releases, keep non-essential personnel away until cleanup complete, dispose of collection equipment as per hazardous waste protocols if contamination risk exists
Handling: Use in a well-ventilated space or under a chemical hood; open container carefully to minimize airborne dust; avoid ingestion, inhalation or contact with skin and eyes; refrain from eating, drinking, or smoking near handling zones
Storage: Store in sealed containers away from direct sunlight, moisture, and sources of extreme temperature; keep away from strong acids and alkalis that can react with sulfate and ammonium; designate dry, cool, well-labeled storage areas with chemical spill trays where practical
Other Precautions: Train personnel in safe material handling, maintain proper documentation and signage, ensure accessibility of emergency eyewash and shower stations
Occupational Exposure Limits: No specific OSHA PEL or ACGIH TLV for aluminium ammonium sulfate, but dust from handling may fall under general nuisance particulate limits (10 mg/m³ TWA for total dust, 5 mg/m³ for respirable fraction)
Engineering Controls: Local exhaust ventilation or use of fume hood recommended to keep urban dust levels below recommended exposure; ensure good general room airflow
Personal Protective Equipment: Safety glasses or chemical splash goggles, chemical-resistant gloves (nitrile or neoprene), dust mask or NIOSH-approved respirator especially where powder handling generates visible aerosols; lab coat, chemical-resistant apron for bulk transfers, closed-toe shoes
Hygiene Measures: Wash hands before eating, drinking, smoking, or after leaving work area; remove and launder contaminated clothing before reuse
Appearance: Colorless to white crystalline solid, often chunky or granular in commercial grade; crystalline powder or block in laboratory packaging
Odor: No significant odor detected
pH: Aqueous solution yields pH of around 3.2 to 3.5 due to sulfate acidity
Melting Point/Freezing Point: Loses crystallization water above 93°C, full decomposition above 200°C
Boiling Point: Decomposes prior to boiling; does not vaporize intact
Solubility in Water: Readily soluble; typical at 70-80g/100ml of water at room temperature
Density: Approximately 1.65 g/cm³
Vapor Pressure: Negligible at standard temperature
Evaporation Rate: Not applicable since non-volatile
Percent Volatile: 0% under ordinary conditions
Other Properties: Not flammable, non-explosive, stable under most indoor environmental conditions
Reactivity: Does not react strongly with most common laboratory chemicals in solid form, mild reactivity in humid/acidic environments
Chemical Stability: Stable under recommended storage; will dehydrate slowly in open air; incompatible with strong alkali and acid due to possible release of ammonia or sulfur oxides
Hazardous Reactions: Liberates gases such as ammonia when mixed with strong bases; reacts with strong oxidizers to form heat and irritating fumes
Conditions to Avoid: High moisture, extreme heat, unsealed storage leading to clumping and caking or degradation
Hazardous Decomposition Products: Includes ammonia, sulfur oxides, possibly traces of aluminum oxide
Likely Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Toxicity: Low for humans, but larger amounts may produce local irritation to mucous membranes, skin or eyes; rodent LD50 (oral) is relatively high, indicating low toxicity for single-dose exposures
Skin Corrosion/Irritation: Mild to moderate; repeated exposure increases risk of dermatitis
Serious Eye Damage/Irritation: Expected to be irritating; can result in redness, watering and pain
Respiratory and Skin Sensitization: Not known as a sensitizer for most individuals; persons prone to allergies should avoid direct handling
Chronic Effects: Repeated contact often triggers minor dermatitis in sensitive persons but seldom produces systemic toxicity
Mutagenicity/Carcinogenicity: No current evidence from animal or human studies for mutagenic, teratogenic or carcinogenic outcomes
Other Data: Persons with existing skin or respiratory conditions may be at greater risk of irritation; allergenic risk from sulfate and aluminium content considered low for occupational users
Aquatic Toxicity: Low to moderate; concentrations above 5 mg/L may affect aquatic organisms, particularly fish and crustaceans, by altering water chemistry (pH, ionic strength)
Persistence and Degradability: Does not degrade biologically; aluminum component may bind to soil or sediment, sulfate and ammonium readily dissolve and move with groundwater
Bioaccumulation Potential: Not known to bioaccumulate in aquatic life, but persistent high loading can increase aluminum concentrations in the environment
Mobility in Soil: High mobility in surface water and wetland systems; leaching from spills may occur in porous, well-drained areas
Other Adverse Effects: Spillage into streams or lakes can temporarily lower pH and elevate metal ion concentrations; attention to local discharge regulations is crucial
Waste Treatment Methods: Preferred route consists of collection of solid or solution waste and processing with licensed chemical waste firm; small diluted quantities may be neutralized for sewer disposal following local permission
Packaging Disposal: Rinse empty containers thoroughly, offer for recycling or puncture and discard as non-hazardous waste
Environmental Hazards: Do not dump into surface water or drains without specific permit; avoid unrestricted landfilling of large quantities of product
Regulatory Requirements: Follow local, regional, and national regulations for handling and disposal of sulfate-containing inorganic salts
UN Number: Not classed as dangerous for transport under UN, IMDG, ADR, or IATA rules
Proper Shipping Name: Aluminium Ammonium Sulfate
Transport Hazard Class: Not regulated
Packing Group: Not assigned; regular chemical packaging standards apply
Environmental Hazards: Not a marine pollutant under IMDG Code, but spillage containment strongly recommended during all ground and sea transit
Special Precautions: Secure product to avoid mechanical shock or container rupture in transit; label clearly to identify product in event of emergency response
TSCA Status: Listed in the US Toxic Substances Control Act Inventory
OSHA: Not specifically regulated, but subject to Hazard Communication Standard; Safety Data Sheet and labeling required in workplaces
SARA Title III: Not listed as a reportable hazardous substance under Sections 302, 304, or 313, although ammonia and aluminum compounds may appear in threshold reporting obligations depending on scale
REACH/EU Registration: Registered as a low toxicity substance, use and supply governed by industry-wide standards for mineral salts
WHMIS (Canada): Classified as D2B (Toxic material causing other effects)
Other Local Regulations: Check local authority lists for additional labeling, storage, and employee protection laws
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
