© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Product Name: Aluminum Selenite
Chemical Formula: Al2(SeO3)3
Synonyms: Aluminium selenite, Alumium(III) selenite
Recommended Use: Research and laboratory applications
Supplier: Chemical manufacturer or academic distributor
Contact Information: Emergency phone numbers and address of the supplier should always be easy to find on product labels.
Classification: Toxic if ingested, inhaled, or upon skin absorption; handling might pose health risks due to selenium content
Signal Word: Danger
Hazard Statements: Harmful or fatal if swallowed; may damage organs through prolonged or repeated exposure; serious risk to bodily health from dust and residue
Pictograms: Skull and crossbones, health hazard symbol
Precautionary Statements: Avoid all unnecessary exposure, do not breathe dust, use only in a well-ventilated area, wash hands after handling, wear protective gloves and clothing
Chemical Name: Aluminum Selenite
CAS Registry Number: 1302-08-1
Purity: Usually above 98% for lab use
Impurities: Could include trace aluminum oxide, selenium oxides
Other Components: Often contains water of crystallization unless specified anhydrous
Inhalation: Move person to fresh air, seek medical attention right away for difficulty breathing, monitor for delayed symptoms
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water for at least 15 minutes, get medical help if irritation develops
Eye Contact: Rinse eyes with copious water for at least 15 minutes, lifting eyelids, look for medical attention immediately
Ingestion: Do not induce vomiting, rinse mouth thoroughly, seek emergency care, symptoms may worsen with time due to selenium toxicity
Notes for Physicians: Monitor for signs of selenium overexposure, such as garlic breath, gastrointestinal distress, and central nervous system symptoms
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam, or sand; avoid water spray if not compatible
Hazards from Combustion: Selenium oxides, aluminum oxide, irritating and toxic fumes
Protective Equipment: Wear full-body fire-resistant suit, self-contained breathing apparatus, keep containers cool with water spray to prevent rupture
Explosion Risk: Not considered flammable, but decomposition at high temperatures can release toxic gases
Advice for Firefighters: Work from upwind, avoid run-off into water sources
Personal Precautions: Evacuate unprotected personnel, use proper respirators and chemical-resistant clothing
Environmental Precautions: Prevent spillage from entering drains or watercourses, selenium compounds can be toxic to aquatic life
Methods for Cleanup: Sweep up without generating dust, place in suitable disposal containers, ventilate area, decontaminate surfaces with suitable cleaning agents
Further Cleanup: Dispose of contaminated cleaning materials as hazardous waste
Handling: Use only in areas with local exhaust ventilation or fume hoods, avoid formation of dust, wash hands and face after working, keep away from food and drinks
Storage: Store in tightly sealed containers, in a cool, dry, well-ventilated, and locked area, keep away from incompatible chemicals such as strong acids, reducing agents, and moisture
Special Requirements: Clearly label containers, have Safety Data Sheets accessible, restrict access to trained employees
Occupational Exposure Limits: OSHA PEL for selenium compounds: 0.2 mg/m3 (as Se, TWA), NIOSH REL 0.2 mg/m3
Engineering Controls: Local exhaust ventilation, laboratory fume hoods, use of enclosed processes
Personal Protective Equipment: Chemical splash goggles, face shield, nitrile or neoprene gloves, laboratory coat, dust mask or properly fitted respirator where dust is generated
Hygiene Measures: Do not eat, drink, or smoke in work area, wash thoroughly after handling, keep contaminated clothing in designated areas
Appearance: Solid, white to off-white powder or crystalline material
Odor: Odorless
Melting Point: Decomposes before melting
Solubility: Slightly soluble in water, decomposes in acids
Density: Approximate bulk density: 3.5 – 4.0 g/cm3
pH: Not applicable in solid form
Partition Coefficient (n-octanol/water): Not available
Other Data: Stable under normal conditions
Stability: Stable at ambient temperature and pressure
Hazardous Reactions: Reacts with acids and strong reducing agents producing selenium dioxide, toxic hydrogen selenide gas may form in contact with strong reducing agents
Decomposition Products: Selenium oxides, aluminum oxide
Incompatibilities: Strong acids, reducing materials, moisture accelerates hydrolysis
Acute Toxicity: Toxic by ingestion, with effects on the gastrointestinal tract, liver, and central nervous system; oral LD50 data in experimental animals support high toxicity
Routes of Exposure: Inhalation of dust, ingestion, skin, and eye contact
Health Effects: Dizziness, vomiting, nausea, garlic breath, damage to liver and kidney, potential fatality at higher doses
Chronic Effects: Long-term exposure can lead to symptoms typical of selenosis, including hair loss, nail brittleness, neurological symptoms
Carcinogenicity: No evidence of carcinogenicity in humans, although selenium compounds are monitored for potential effects
Ecotoxicity: Selenium compounds are very toxic to aquatic organisms and may cause long-term adverse effects in the aquatic environment
Persistence and Degradability: Inorganic selenium can persist and bioaccumulate in environments
Bioaccumulation: High potential due to uptake in plants and aquatic species
Mobility in Soil: Moderate mobility, can leach into ground water
Additional Remarks: Avoid uncontrolled release, spills may require specialized cleanup
Waste Treatment Methods: Collect and submit waste for disposal at a chemical waste facility licensed to handle toxic and selenium-containing material
Disposal of Contaminated Packaging: Triple-rinse containers and puncture or crush before landfilling, or offer to licensed drum reconditioners
Regulatory Requirements: Waste classification and transportation subject to government regulations due to selenium’s toxicity
Precautions: Do not discharge into drains, surface water, or soil
UN Number: UN3283 (Selenium compound, n.o.s.)
Proper Shipping Name: Aluminum Selenite, or Selenium compound, n.o.s.
Hazard Class: 6.1 (Toxic Substances)
Packing Group: II or III, depending on quantity and packaging
Labels: Toxic, Environmentally Hazardous Substance
Special Provisions: Segregate from acids and strong oxidizing agents during transport, comply with local, national, and international transport regulations
OSHA: Listed as hazardous due to toxicity of selenium compounds
TSCA: Listed on US TSCA Inventory
SARA Title III: Subject to reporting under Section 302/313 if handled in large quantities
REACH (EU): Registration may be required, labeled under substances of high concern in EU
Other Regulations: Subject to strict disposal guidelines, restricted access for non-professionals, environmental restrictions in some regions due to selenium’s environmental persistence and toxicity
