© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Product Name: Selenium Bromide
Chemical Formula: SeBr2
Other Names: Dibromoselenium
Recommended Use: Laboratory chemical, reagent
Manufacturer: Available from chemical suppliers specializing in inorganic compounds
Contact Number: Emergency telephone numbers provided by supplier on label and invoice
Classification: Acute toxicity (inhalation, oral, and dermal), Corrosive to skin and eyes, Toxic to aquatic life
Signal Word: Danger
Hazard Statements: Fatal if inhaled, Swallowing or skin contact can be deadly, Causes severe burns to skin and eyes, Very toxic to aquatic organisms in case of release
Precautionary Statements: Avoid breathing dust, fumes, or mist, Keep container tightly closed, Wear protective gloves, clothing, and eye and face protection, Avoid release to the environment, Wash thoroughly after handling
Chemical Name: Selenium Bromide
CAS Number: 7789-44-8
EC Number: 232-115-4
Purity: Typically 98% or higher
Impurities: Trace amounts of selenium oxides or tribromide forms may be present depending on synthesis process
Eye Contact: Flush eyes with large amounts of water for a minimum of 15 minutes, lift eyelids occasionally, seek medical help immediately
Skin Contact: Remove contaminated clothing, wash affected area using plenty of running water and mild soap, obtain medical assistance straight away
Inhalation: Move person into fresh air, supply oxygen if breathing is difficult, get trained medical help as soon as possible, administer artificial respiration if needed
Ingestion: Seek immediate medical attention, do not induce vomiting, rinse mouth thoroughly with water if person is conscious, never administer anything by mouth to an unconscious individual
Note to Physicians: Treat as a highly toxic substance affecting multiple organ systems, watch for delayed onset symptoms affecting liver, kidneys, or lungs
Flammable Properties: Compound itself is not highly flammable, but releases toxic and corrosive gases on heating or combustion
Hazardous Combustion Products: Releases hydrogen bromide, selenium oxides, and bromine gas when exposed to fire
Suitable Extinguishing Media: Use dry powder, sand, or carbon dioxide to extinguish flames; water spray can be used with extreme caution because contact with water in large quantities may generate additional toxic gases
Firefighter Protection: Complete chemical protective suit, self-contained breathing apparatus, evacuation of area recommended
Advice for Firefighters: Cool adjacent containers with water spray to prevent buildup of internal pressure due to heat
Personal Precautions: Secure area and evacuate non-essential personnel, wear chemical splash goggles, gloves, and full protective clothing, appropriate respirator if airborne dust or vapor may be present
Environmental Precautions: Prevent further leakage or spillage if safe to do so, keep away from drains, water courses, and soil to minimize harm to aquatic life
Methods for Clean-Up: Use inert, dry absorbent materials like sand or vermiculite, collect material with tools that reduce dust, place inside tightly sealed containers, dispose through licensed waste contractor
Decontamination: Wash affected areas with large amounts of water after removal of material, ensure proper ventilation for area prior to re-entry
Handling: Always use local exhaust ventilation in work area, avoid inhalation, ingestion, and contact with skin and eyes, handle only in an environment with strict controls for potential exposure, strictly prohibit smoking, eating, and drinking near work area
Storage: Keep containers tightly sealed in a cool, dry, and well-ventilated place; store away from incompatible materials such as strong acids, bases, and oxidizers, ensure container materials resist corrosion, use secondary containment to avoid spills, label storage according to regulatory requirements
Engineering Controls: Chemical fume hood with forced ventilation recommended, separate from common work areas
Personal Protective Equipment: Chemical-resistant gloves such as nitrile or neoprene, full-length lab coat or coveralls, safety goggles and face shield, approved respirator if airborne concentrations exceed exposure limits or during spill situations
Hygiene Measures: Wash thoroughly with soap and water before breaks or after handling, remove contaminated clothing and wash separately before reuse, do not touch face or exposed skin areas without decontaminating
Appearance: Reddish-brown liquid or solid, depending on temperature and pressure
Odor: Pungent, irritating
Melting Point: 220°C
Boiling Point: 300–325°C
Solubility: Reacts slowly with water, decomposing to selenious and hydrobromic acid, soluble in organic solvents like carbon disulfide and chloroform
Vapor Pressure: Slight at room temperature
Relative Density: Approximately 3.347 g/cm³
pH: Strongly acidic on contact with moisture
Partition Coefficient: Data limited, but significant potential for bioaccumulation due to selenium content
Chemical Stability: Stable under recommended storage conditions away from light, moisture, and heat; decomposes with exposure to moisture, heat, or strong light
Reactivity: Reacts with water producing hydrobromic acid and selenious acid, incompatible with oxidizers, strong reducing agents, and bases
Hazardous Decomposition Products: Bromine, selenium dioxide, hydrobromic acid vapors are formed on decomposition
Instability: Stability compromised by presence of moisture, heat, or incompatibles, which can result in generation of toxic gases
Acute Toxicity: Highly toxic by inhalation, skin absorption or ingestion; LD50 (oral, rat): 41 mg/kg, LC50 (inhalation, rat): 0.014 mg/L/4h
Chronic Effects: Chronic, low-level exposure leads to selenium accumulation in body tissues, causing neurological symptoms, garlic breath, gastrointestinal problems, loss of nails and hair, respiratory distress
Skin/Eye Irritation: Causes severe irritation and burns, may result in permanent tissue damage
Carcinogenicity/Mutagenicity: No conclusive evidence for carcinogenicity, but some selenium compounds possibly linked to reproductive toxicity and mutagenesis
Sensitization: May lead to allergic reactions or sensitization in some individuals
Target Organs: Kidneys, liver, lungs, central nervous system
Ecotoxicity: Extremely toxic to aquatic organisms, acute and chronic effects at low concentrations, bioaccumulation in food chains
Mobility: Moves readily through moist soil into water systems, may persist in certain environmental conditions due to selenium's natural resistance to degradation
Persistence and Degradability: Selenium does not break down easily in soil or water, bromide released may increase acidity of ecosystems
Bioaccumulative Potential: Selenium compounds accumulate in fish, birds, and mammals, can enter food web at high concentrations
Other Adverse Effects: Significant risk to birds and aquatic species, trace runoff may cause irreversible impacts to sensitive habitats
Waste Treatment Methods: Treat as hazardous waste according to local, regional, and national regulations, do not flush to drains or environment
Recommended Disposal: Send to licensed hazardous waste facility for chemical or physical treatment, incineration approved if site uses pollution scrubbers for toxic gases
Container Disposal: Triple rinse empty containers, puncture and dispose as hazardous waste; do not reuse packaging for other materials
Sewage Disposal: Strictly prohibited due to acute and chronic aquatic toxicity
UN Number: UN3283
Proper Shipping Name: Selenium compound, n.o.s. (Selenium Bromide)
Transport Hazard Class: 6.1 (Toxic material)
Packing Group: II
Labels: Toxic, Environmentally Hazardous Substance
Special Precautions: Secure all containers tightly, use secondary containment, ensure documentation matches cargo; shippers must have training in handling hazardous chemicals; transport in compliance with national and international regulations including IMDG, ADR, and IATA
Workplace Exposure Limits: OSHA and NIOSH recommend strict controls, reference levels for selenium compounds usually 0.2 mg/m³; enforce stricter site-specific limits based on risk assessment
Chemical Inventory Listings: Included in TSCA (US), REACH (EU), and comparable registers in other regions
Hazard Classification: Classified under CLP (EU Regulation (EC) No 1272/2008) as acute toxic, corrosive, and hazardous to environment
Reporting Requirements: Subject to release reporting under SARA Title III (EPCRA) and CERCLA; all handlers must maintain compliance with site and national reporting obligations
Other Regulations: PPE must comply with ANSI, EN, or equivalent standards, emergency response plans required for all facilities stocking quantities above regulatory thresholds, restriction on use near waterways or public sewers in many jurisdictions
