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Product Name: Calcium Selenite
Chemical Formula: CaSeO3
Other Names: Calcium Salt of Selenious Acid
CAS Number: 14056-56-7
Use: Laboratory chemical, research chemical
Manufacturer: [Contact details of supplier]
Emergency Contacts: [Local emergency numbers, supplier emergency number]
Classification: Acute Toxicity (Oral) Category 3, Skin Irritant Category 2, Eye Irritant Category 2A, Environmental Hazard (Chronic, Aquatic) Category 2
Hazard Statements: Toxic if swallowed; causes skin irritation; causes serious eye irritation; toxic to aquatic life with long-lasting effects
Pictograms: Skull and crossbones, exclamation mark, aquatic toxicity
Signal Word: Danger
Precautionary Statements: Avoid breathing dust; wash hands thoroughly after handling; avoid release to environment; wear protective gloves, eye protection, and face protection; if swallowed, rinse mouth and seek immediate medical attention
Component: Calcium Selenite
Chemical Identity: CaSeO3
Concentration: >98% by weight
Impurities: Trace metal contaminants may be present at very low levels
Inhalation: Move to fresh air right away; seek medical advice if symptoms develop such as coughing or difficulty breathing
Skin Contact: Remove contaminated clothing and wash exposed skin with plenty of water and soap; obtain medical attention if irritation persists
Eye Contact: Rinse opened eyes cautiously with plenty of clean water for at least 15 minutes; remove contact lenses; get prompt professional help
Ingestion: Do not induce vomiting; rinse mouth with water; call a poison center or doctor without delay
Notes for Doctors: Treat based on symptoms; monitor for selenium toxicity, such as gastrointestinal distress or garlic breath
Suitable Extinguishing Media: Dry chemical, CO2, sand, or alcohol-resistant foam; water spray can help to cool exposed containers
Unsuitable Extinguishing Media: Do not use strong water jets directly on material
Special Hazards: Releases toxic and irritating fumes of selenium oxides and calcium oxide when heated
Advice for Firefighters: Wear self-contained breathing apparatus, full protective clothing, and keep upwind of fire scene; avoid inhaling combustion products; evacuate unnecessary personnel from area
Explosion Hazards: Dust may form explosive mixture with air in confined spaces; clear dust accumulations regularly
Personal Precautions: Avoid dust formation; ventilate the area; wear gloves, goggles, and a dust mask; remove unprotected individuals from spill area
Environmental Precautions: Prevent entry into soil, water systems, and drains; inform authorities if contamination occurs
Cleanup Methods: Collect spilled material with a clean, dry shovel into secure containers; wipe surfaces with damp cloth; dispose according to local regulations; ventilate area after cleanup
Disposal: Store collected waste away from incompatible substances or acids to prevent hazardous reactions
Safe Handling: Work under a chemical fume hood; avoid inhalation and contact with skin or eyes; wear suitable protective gear; minimize dust generation; practice good hygiene after handling
Storage Conditions: Store in a tightly closed, corrosion-resistant container in a well-ventilated, cool, dry, and dark place; segregate from incompatible substances such as acids, strong oxidizers, and reducing agents; label containers clearly
Packing Materials: Use plastic, polyethylene, or glass containers that resist corrosion or reaction with the product
Occupational Exposure Limits: Selenium compounds expressed as Se: OSHA PEL - 0.2 mg/m3 (as selenium); ACGIH TLV - 0.2 mg/m3 (as selenium)
Engineering Controls: Use local exhaust ventilation or fume hood to contain dust or vapors; install air monitoring equipment for detection
Personal Protective Equipment: Gloves (nitrile, neoprene); safety goggles or face shield; laboratory coat; approved respirator when exposure risk exists; clean clothing after use
Hygiene Measures: Avoid eating, drinking, or smoking near area; wash hands and face after use; inspect protective equipment before use
Appearance: White to off-white crystalline powder
Odor: Odorless
Molecular Weight: 183.04 g/mol
Solubility in Water: Slightly soluble
pH: Slightly alkaline (aqueous solution)
Melting Point: Decomposes before melting
Boiling Point: Not determined (decomposes)
Vapor Pressure: Not applicable
Density: 3.2 – 3.3 g/cm3
Other Properties: Stable under normal physical conditions; sensitive to moisture
Chemical Stability: Stable at room temperature and under recommended storage conditions
Reactivity: Non-reactive with most building materials; sensitive to acids or strong reducing/oxidizing agents
Hazardous Reactions: Contact with acids liberates toxic selenious acid; prolonged exposure to moisture can lead to slow decomposition
Hazardous Decomposition Products: May produce selenium oxides, calcium oxide, and toxic fumes on heating
Incompatible Materials: Strong acids, strong oxidizing or reducing agents, ammonium salts
Acute Toxicity (Oral): LD50 (rat) - 18 mg/kg (as selenium compounds)
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Symptoms of Exposure: Nausea, vomiting, abdominal pain, garlic-like odor on breath, dizziness, skin and eye redness, irritation
Chronic Effects: Chronic exposure may affect liver, kidneys, nervous system; possible risk of selenium poisoning
Sensitization: Not reported
Carcinogenic Status: Selenium compounds not listed as carcinogenic by IARC, NTP, or OSHA, but long-term exposure deserves medical attention
Mutagenicity: No data available for calcium selenite; other selenium compounds have shown mutagenic effects in vitro
Ecotoxicity: Highly toxic to aquatic organisms including fish and invertebrates
Aquatic Data: LC50 (Danio rerio, 96h): 1–5 mg/L (as selenium)
Persistence and Degradability: Not rapidly degradable; may persist in soil and water
Bioaccumulation: Selenium can bioaccumulate in aquatic environments, leading to higher food chain toxicity
Soil Mobility: Moderately mobile; risk of groundwater contamination exists if released in large quantities
Other Adverse Effects: Biological magnification observed in fish and bird species in contaminated habitats
Waste Treatment Methods: Dispose material as hazardous waste in accordance with federal, state, and local environmental control regulations
Container Disposal: Rinse containers thoroughly, puncture, and send for proper disposal by licensed facility
Recycling/Reuse: Not recommended due to toxicity and risk of environmental release
Precautions: Prevent uncontrolled release; do not dump into drains, sewers, or outdoor soil
UN Number: 3288
UN Proper Shipping Name: Toxic solid, inorganic, n.o.s. (contains Calcium Selenite)
Transport Hazard Class: 6.1 (Toxic substances)
Packing Group: II
Environmental Hazards: Classified as marine pollutant
Special Precautions: Ensure containers remain sealed, labeled, and protected against moisture; follow all handling and stowage guidelines to prevent accidental release during shipping; transport only with authorized carriers
TSCA Inventory: Listed
RCRA Status: Hazardous waste under certain criteria (as selenium compound)
SARA Title III: Subject to reporting under Section 313 for selenium compounds
OSHA HazCom: Classified hazardous chemical
Other Regulations: May be subject to state and local environmental regulations due to selenium content; workplace handling should conform to OSHA, NIOSH, and EU REACH/GHS requirements
Labeling: Clearly identify hazard categories and emergency response contacts on product containers
International Inventories: Registered on relevant chemical inventory lists for EU, US, Canada, Australia, and other applicable regions
