Material Safety Data Sheet: Selenium Bromide

Identification

Product Name: Selenium Bromide
Chemical Formula: SeBr₂
CAS Number: 7789-44-8
EC Number: 232-170-2
Recommended Use: Laboratory chemicals, chemical synthesis
Manufacturer/Supplier: Company address, phone number, emergency contact information

Hazard Identification

GHS Classification: Acute toxicity (oral, dermal, inhalation), Skin corrosion, Serious eye damage, Specific target organ toxicity
Hazard Pictograms: Skull and crossbones, corrosion, exclamation mark
Signal Word: Danger
Hazard Statements: Toxic if swallowed, inhaled, or in contact with skin. Causes severe skin burns and eye damage. May involve danger to organs through prolonged or repeated exposure.
Precautionary Statements: Avoid breathing dust or fumes, wear protective gloves and eye protection, wash thoroughly after handling, store locked up, dispose of contents in accordance with local regulations.

Composition / Information on Ingredients

Chemical Name: Selenium Bromide
Synonyms: Selenous dibromide
Concentration: 100%
Molecular Weight: 222.77 g/mol
Impurities: No significant impurities impacting classification

First Aid Measures

Inhalation: Move to fresh air immediately, monitor breathing, provide oxygen or artificial respiration if needed, seek medical attention without delay.
Skin Contact: Remove contaminated clothing, rinse skin with plenty of water for at least 20 minutes, do not use neutralizing chemical, obtain medical care urgently.
Eye Contact: Rinse cautiously with water for several minutes while holding eyelids apart, remove contact lenses if present and easy to do, continue flushing, medical consultation required.
Ingestion: Rinse mouth thoroughly, do not induce vomiting, never give anything by mouth to an unconscious person, immediate medical assistance is essential.
Note to Physician: Treat symptomatically, support vital functions, monitor for delayed pulmonary or neurological symptoms.

Fire-Fighting Measures

Suitable Extinguishing Media: Use dry chemical powder, carbon dioxide, or foam, do not use water for direct contact with substance.
Specific Hazards Arising from Chemical: Releases hazardous fumes of selenium oxides and hydrogen bromide under fire conditions; container rupture possible due to pressure build up.
Protective Equipment for Firefighters: Full protective clothing, self-contained breathing apparatus, keep ignition sources away.
Firefighting Instructions: Move containers from fire area if safe, dike runoff from firefighting to prevent contamination, observe standard procedures for hazardous chemicals.

Accidental Release Measures

Personal Precautions: Evacuate area, provide adequate ventilation, avoid breathing dust and fumes, remove all sources of ignition, wear chemical-resistant gloves, respirator, and safety goggles.
Environmental Precautions: Prevent spread into waterways, drains, soil, or vegetation, notify authorities if contamination occurs.
Spill Clean-Up Methods: Absorb with inert material, scoop into labeled waste containers, wash spill site with soapy water after material pick-up, decontaminate all tools and equipment, ventilate area well before re-entry.

Handling and Storage

Handling: Handle only in chemical fume hood or well-ventilated area, avoid direct contact with skin and eyes, use proper PPE at all times, prevent formation of dust, do not eat, drink, or smoke while working with the product.
Storage: Store in tightly closed, corrosion-resistant containers, keep away from incompatible materials like acids and strong oxidizers, maintain cool, dry conditions, ensure proper labeling, limit access to trained personnel, keep away from sources of heat and moisture.

Exposure Controls and Personal Protection

Exposure Limits: Selenium compounds OSHA PEL (0.2 mg/m³ as Se); ACGIH TLV (0.2 mg/m³ as Se)
Engineering Controls: Local exhaust ventilation, closed process system, eye wash stations, safety showers
Personal Protective Equipment: Chemical splash goggles, face shield, impervious gloves, lab coat or coveralls, appropriate respirator for concentration and exposure type
Hygiene Measures: Wash hands thoroughly after handling, remove and wash contaminated clothing before reuse, prohibit food and drink in work area

Physical and Chemical Properties

Appearance: Red to orange crystals
Odor: Pungent
Melting Point: 200 °C
Boiling Point: Decomposes
Solubility: Reacts with water, soluble in organic solvents
Density: 3.46 g/cm³
Vapor Pressure: Not available
pH: Acidic on dissolution
Flash Point: Not flammable
Other Data: Highly corrosive, releases toxic gases on contact with water or acids

Stability and Reactivity

Chemical Stability: Stable under recommended storage conditions, decomposes in contact with moisture or strong bases.
Reactivity: Reacts violently with water, acids, and oxidizers.
Hazardous Decomposition Products: Selenium oxides, hydrogen bromide
Conditions to Avoid: Heat, humidity, water, contact with incompatible chemicals
Incompatible Materials: Strong acids, strong oxidizers, water, alkalis

Toxicological Information

Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Effects: Severe irritation to skin, eyes, and respiratory tract, burns, corrosion, toxicity to central nervous system, gastrointestinal disturbances
Chronic Effects: Selenium accumulation may lead to selenosis, with symptoms including hair loss, nail brittleness, fatigue, neurological impairment
LD50 (oral, rat): Data not available specifically for SeBr₂, selenium compounds typically toxic at low mg/kg doses
Carcinogenicity: Not listed as carcinogen by IARC, NTP, or OSHA
Other Data: Prolonged exposure impacts kidneys, liver, nervous system

Ecological Information

Toxicity to Aquatic Life: Highly toxic to aquatic organisms, may cause long-term adverse effects
Environmental Fate: Strongly bioaccumulative, persistent in environment, can contaminate soil and water
Mobility: Leaches through soil, persistence in aquatic systems
Degradability: Not easily degraded in the environment, transforms to other selenium species
Bioaccumulation: High risk for bioaccumulation in aquatic and terrestrial food chains
Other Effects: Risk of biomagnification in higher trophic levels

Disposal Considerations

Waste Disposal: Collect and place in appropriate hazardous waste containers, label clearly, arrange disposal by licensed chemical waste service, do not discharge into drains or environment
Contaminated Packaging: Treat as hazardous waste, triple rinse with suitable solvent before disposal, send to approved facility
Disposal Methods: Incineration preferred in chemical incinerators equipped with scrubbers, observe all local, regional, national, and international waste regulations
Precautions: Wear full protective gear and avoid direct contact during handling and transfer to waste storage

Transport Information

UN Number: 3283
UN Proper Shipping Name: SELENIUM COMPOUND, N.O.S. (Selenium Bromide)
Transport Hazard Class: 6.1 (Toxic substances)
Packing Group: II
Environmental Hazards: Marine pollutant, dangerous to waterways
Special Precautions: Avoid physical damage to containers during transport, keep segregated from incompatible cargo, emergency response guidance available in shipping documents, vehicle operator must be trained in chemical transport

Regulatory Information

U.S. Federal Regulations: Selenium compounds listed under TSCA, subject to SARA 313 reporting requirements, regulated as a hazardous substance by CERCLA
OSHA Classification: Hazardous chemical
European Union: Classified under Regulation (EC) No. 1272/2008 (CLP/GHS); subject to REACH registration
International Inventories: Listed on major chemical inventories (TSCA, EINECS, DSL)
Other Regulations: Restrictions may apply to sale, use, and transport; detailed safety training required for all handlers
Label Elements: Product packaging and Safety Data Sheet must display appropriate pictograms, hazard statements, and safety precautions as per jurisdiction