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Product Name: Magnesium Selenite
Chemical Formula: MgSeO3
Common Names: Magnesium Selenite, Selenious Acid, Magnesium Salt
CAS Number: 15584-18-0
Recommended Use: Laboratory reagent, chemical synthesis, research
Manufacturer/Supplier: Listed on shipment documentation
Contact Information: Emergency telephone and address on label and on SDS documentation
Classification: Toxic if swallowed, causes skin and eye irritation, hazardous to aquatic environment
Label Elements: Skull and crossbones symbol, exclamation mark
Signal Word: Danger
Hazard Statements: May cause acute toxicity, risk of serious health effects after ingestion, suspected of causing genetic defects, long-term effects for aquatic life
Precautionary Statements: Avoid all forms of ingestion, inhalation, and direct contact; proper personal protective equipment required
Other Hazards: Harmful if inhaled, risk of selenium toxicity through cumulative exposure, avoid contact with combustibles and acids
Chemical Identity: Magnesium Selenite
Purity: >97%
Synonyms: Magnesium Selenite (V), Selenious acid magnesium salt
Impurities: Trace by-products from synthesis process
Molecular Weight: 166.28 g/mol
Inhalation: Move to fresh air, keep victim at rest, provide oxygen if breathing is difficult, call physician immediately
Skin Contact: Remove contaminated clothing and shoes, wash affected area with soap and water for at least 15 minutes, seek medical attention if irritation persists
Eye Contact: Rinse eyes immediately with water for at least 15 minutes lifting upper and lower eyelids, seek prompt medical care
Ingestion: Do not induce vomiting unless directed by medical personnel, rinse mouth with water, seek immediate medical attention
Most Important Symptoms/Effects: Headache, nausea, vomiting, abdominal pain, severe respiratory discomfort
Suitable Extinguishing Media: Use foam, dry chemical, CO2, water spray
Specific Hazards: May release toxic selenium oxides under fire conditions, product does not burn but can decompose with heat
Advice for Firefighters: Wear full protective gear and self-contained breathing apparatus, avoid breathing fumes
Special Protective Actions: Remove containers from fire area if safe, cool containers with water spray, prevent water runoff into drains
Personal Precautions: Wear goggles, gloves, and lab coat during cleanup, avoid dust formation, ensure adequate ventilation
Environmental Precautions: Prevent further leakage, keep out of sewers and natural water sources, use absorbent material to contain spill
Spill Clean Up: Sweep up material, avoid raising dust, collect in suitable closed container for disposal, wash spill site with copious water after material pick-up
Reporting: Notify environmental authorities if large quantities enter waterways or environment
Safe Handling: Work in well-ventilated area, use proper personal protective equipment, avoid ingestion, inhalation, and contact with skin or eyes, wash hands thoroughly after handling
Storage Conditions: Keep in tightly closed container, store in cool, dry area away from direct sunlight, incompatible substances, and foodstuffs
Special Requirements: Access to safety eyewash and emergency shower required, store in corrosion-resistant containers
Incompatibilities: Strong acids, oxidizers, reducing agents, avoid storage with incompatible materials
Occupational Limits: Selenium compounds OSHA PEL: 0.2 mg/m3 (as Se), ACGIH TLV: 0.2 mg/m3
Engineering Controls: Use in fume hood or well-ventilated area, eyewash stations, safety showers
Respiratory Protection: Approved respirator if airborne dust is generated
Protective Gloves: Nitrile or neoprene
Eye Protection: Chemical safety goggles
Skin/Body Protection: Lab coat, long sleeves, closed-toe shoes
Hygiene Measures: Avoid eating, drinking, or smoking during use, wash thoroughly after handling
Appearance: White to off-white crystalline powder
Odor: Odorless
Odor Threshold: Not available
pH: Slightly acidic in water
Melting Point: Decomposes before melting
Boiling Point: Not applicable
Flash Point: Not flammable
Evaporation Rate: Not available
Flammability: Not classified as flammable
Vapor Pressure: Negligible
Vapor Density: Not applicable
Solubility in Water: Slightly soluble
Partition Coefficient: Not determined
Auto-Ignition Temperature: Not self-igniting
Decomposition Temperature: Above 400°C
Appearance Stability: Stable under normal conditions
Chemical Stability: Stable in closed containers at normal temperatures
Reactivity: May react with strong acids, forming toxic hydrogen selenide gas
Hazardous Reactions: Not sensitive to impact or friction, contact with acids or reducing agents releases toxic gases
Conditions to Avoid: High humidity, extreme temperatures, contact with incompatible materials
Incompatible Materials: Strong acids, oxidizing agents, strong reducing agents
Hazardous Decomposition: Selenium oxides, hydrogen selenide under fire or strong acid conditions
Acute Toxicity: Highly toxic if ingested, toxic by inhalation, toxic by skin absorption
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Symptoms: Dizziness, abdominal pain, fatigue, severe gastrointestinal effects, respiratory distress
Chronic Effects: Prolonged exposure may cause selenium poisoning, liver, and kidney damage, skin and mucous membrane irritation
LD50 (Oral, Rat): Approximately 10 mg/kg (data varies)
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, OSHA
Sensitization: No data available for skin or respiratory sensitization
Other Data: Risk of reproductive and developmental toxicity with repeated or high exposure
Ecotoxicity: Toxic for aquatic organisms, causes long-term adverse effects in aquatic environments
Persistence and Degradability: Not readily biodegradable, selenium compounds can persist and bioaccumulate
Bioaccumulation: Risk of buildup in aquatic and terrestrial organisms
Mobility in Soil: Moderate to high mobility in water, may adversely affect local ecosystems
Other Adverse Effects: Selenium toxicity documented in aquatic food chains, disrupts ecosystems, potential to contaminate groundwater
Waste Disposal Methods: Dispose through licensed waste contractor, follow local, regional, and national regulations for hazardous waste
Contaminated Packaging: Dispose of packaging as hazardous waste, do not reuse containers, ensure all residues are removed and handled safely
Special Precautions: Prevent any spillage from reaching land, waterways, or drains, incinerate or landfill only at authorized facilities with proper controls
Regulatory Considerations: Classified toxic hazardous waste, must document disposal route, chemical logs required
UN Number: 3283 (for selenium compounds, toxic, solid)
UN Proper Shipping Name: Selenium compound, n.o.s. (Magnesium selenite)
Transport Hazard Class: 6.1 (Toxic substance)
Packing Group: II
Environmental Hazards: Marine pollutant, toxic to aquatic life
Special Precautions: Label according to DOT, IMDG, IATA requirements, use appropriate containment to avoid accidental release, notify carrier of potential hazards
Emergency Response Guide Number: 151 (for toxic solids)
U.S. Regulations: Listed on TSCA inventory, regulated under OSHA hazardous chemicals rules, subject to SARA Title III reporting
EU Regulations: Registered under REACH, classified according to EU CLP Regulation
International Inventory: Present on inventories in Canada (DSL), Australia (AICS), China (IECSC)
Workplace Restrictions: Occupational exposure limits enforced under local labor authorities
Label Requirements: Hazard pictograms, signal word, hazard statements in compliance with GHS
Restrictions on Use: For industrial, research, and laboratory use only unless stated otherwise
Other Requirements: Users must be trained in chemical handling protocols, regular review of workplace safety procedures, safety audits as required by law
