MSDS for Phenyl Selenium Bromide

Identification

Product Name: Phenyl Selenium Bromide
Chemical Formula: C6H5SeBr
CAS Number: 14660-52-7
Synonyms: Phenyl selenyl bromide, Selenobenzene bromide
Intended Use: Laboratory chemical, organic synthesis
Manufacturer: Major chemical suppliers list this compound
Emergency Phone: Local poison control center, workplace emergency services
Supplier Contact: Refer to purchase documentation for current supplier details

Hazard Identification

GHS Classification: Acute toxicity, Oral (Category 3); Acute toxicity, Inhalation (Category 3); Skin irritation (Category 2); Eye irritation (Category 2A); Aquatic acute toxicity (Category 1)
Signal Word: Danger
Hazard Statements: Toxic if swallowed, inhaled or in contact with skin; Causes skin and eye irritation; Very toxic to aquatic life
Precautionary Statements: Avoid breathing vapors, wear protective gear, avoid environmental release
Pictograms: Skull and crossbones, exclamation mark, environment
Chronic Effects: Selenium compounds may target liver, kidney, and the central nervous system with long-term exposure

Composition / Information on Ingredients

Chemical Name: Phenyl Selenium Bromide
Concentration: 98–100% by weight
Impurities: Trace benzene derivatives, minor selenium contaminants (usually less than 1%)
Molecular Weight: 234.96 g/mol
Chemical Family: Organoselenium compound
EC Number: 238-697-7

First Aid Measures

Inhalation: Remove to fresh air quickly, keep at rest, administer artificial respiration if not breathing and seek immediate medical help
Skin Contact: Remove contaminated clothing, wash skin with plenty of water and soap for several minutes, obtain medical attention
Eye Contact: Rinse eyes cautiously with water for at least 15 minutes, lift eyelids occasionally, get medical advice
Ingestion: Rinse mouth, do not induce vomiting, never give anything by mouth if victim is unconscious, seek emergency medical help
Most Important Symptoms and Effects: Nausea, headache, dizziness, skin and eye burns, respiratory tract irritation, risk of delayed effects on organs (liver/kidney)
Advice for Physicians: Treat symptoms, monitor for selenium toxicity, provide oxygen and supportive care

Fire-Fighting Measures

Suitable Extinguishing Media: Dry chemical, CO2, foam; avoid using water on burning chemical
Special Hazards: Decomposition may release toxic gases—selenium oxides, hydrogen bromide, phenyl vapors
Protective Equipment: Full face self-contained breathing apparatus, chemical resistant suit
Firefighting Procedures: Move unaffected containers from area, avoid inhalation of combustion products, use water spray to cool exposed surfaces only
Hazardous Combustion Products: Selenium dioxide, phosgene, bromide fumes are possible
Explosion Risk: Reacts violently with strong oxidizers; may cause an explosion on contact

Accidental Release Measures

Personnel Precautions: Evacuate unnecessary personnel, ventilate area, wear protective clothing, gloves, and eye protection
Environmental Precautions: Prevent further leakage, avoid discharge to drains, keep out of waterways and soil
Methods for Containment: Absorb with inert materials (sand, vermiculite), collect in suitable containers for disposal
Cleanup Procedures: Shovel up absorbed material, wash spill area thoroughly with detergent and excess water, ventilate area
Decontamination Tools: Use non-sparking tools, avoid dust or vapor formation, dispose of contaminated materials according to regulations

Handling and Storage

Handling: Work inside a well-ventilated fume hood, wear appropriate PPE (lab coat, gloves, goggles), keep away from open flame, avoid skin or eye contact
Storage: Store in tightly sealed amber bottles, keep in a cool, dry, well-ventilated place, segregate from oxidizers, acids, and moisture
Special Considerations: Label containers clearly, avoid storage near food or incompatible materials, do not store above 25°C
Hygienic Practices: Wash hands before smoking, eating, or drinking, remove contaminated clothing before leaving the work area

Exposure Controls and Personal Protection

Occupational Exposure Limits: No specific OSHA or ACGIH limits for this material; treat as a hazardous organoselenium analog
Engineering Controls: Fume hoods, local exhaust ventilation, use non-sparking electrical equipment
Respiratory Protection: Approved respirator with organic vapor/HEPA cartridges if airborne limits are exceeded
Skin Protection: Chemical-resistant gloves (nitrile, neoprene), long-sleeve protective clothing
Eye/Face Protection: Tight-fitting chemical splash goggles, face shields for large spills
Environmental Controls: Prevent entry into drains and sewers; workplace spills must be contained and treated as hazardous waste

Physical and Chemical Properties

Appearance: Yellow to orange crystalline solid
Odor: Acrid, pungent (may cause irritation with inhalation)
Melting Point: 65–68°C
Boiling Point: Not well-defined (compound decomposes)
Solubility: Limited solubility in water; soluble in organic solvents (chloroform, dichloromethane, benzene, ether)
Vapor Pressure: Low at room temperature
pH: Not applicable (non-aqueous solid)
Density: Approximately 2.39 g/cm³
Flash Point: Not readily flammable but avoid ignition sources
Other Information: Decomposes on exposure to light and air, releases toxic fumes on decomposition

Stability and Reactivity

Chemical Stability: Stable under recommended storage conditions
Conditions to Avoid: Exposure to light, heat, moisture, and air
Materials to Avoid: Strong acids, bases, oxidizers, active metals
Hazardous Decomposition Products: Hydrogen bromide, selenium oxide, phenyl derivatives
Polymerization: No information on hazardous polymerization events
Reactive Hazards: Can react vigorously with incompatible chemicals, releasing toxic gases

Toxicological Information

Acute Effects: Swallowing causes nausea, vomiting, abdominal pain, severe irritation; inhalation brings coughing, sore throat, pulmonary edema possible
Chronic Effects: Prolonged exposure may damage liver, kidneys, nervous system, resulting in selenosis (nail loss, garlic breath, skin rash)
Sensitization: Sensitizer in rare cases on skin contact
LD50 (oral, rat): Data limited, but ranges for similar selenium compounds point to significant toxicity
Carcinogenicity: Not listed as carcinogenic by IARC, NTP, OSHA, but some selenium compounds display mutagenic potential
Other Data: No reproductive toxicity information; acute exposure is considered highly dangerous

Ecological Information

Toxicity to Aquatic Organisms: Extremely toxic to fish, daphnia, algae at sub-milligram levels
Persistence and Degradability: Not rapidly degraded in environment, persistent selenium species pose bioaccumulation risks
Mobility in Soil: Moderate mobility, risk of leaching to groundwater
Bioaccumulation: Significant potential, selenium accumulates in food chain, chronic environmental hazard
Other Ecological Hazards: Contaminates waterways, even low quantities can poison wildlife, restrict disposal to approved hazardous waste facilities

Disposal Considerations

Waste Treatment Methods: Collect and seal waste and contaminated absorbents in chemical waste containers approved for hazardous waste
Disposal Restrictions: Never dispose in regular trash, sinks or general landfill
Incineration: Only in licensed, approved chemical incinerators with scrubbers
Contaminated Packaging: Triple rinse, then treat as hazardous waste
Environmental Release: Illegal and dangerous; follow state, local and federal waste disposal laws to the letter

Transport Information

UN Number: UN3283
Proper Shipping Name: Selenium compound, organic, solid
Transport Hazard Class: 6.1 (Toxic substance)
Packing Group: II
Hazard Label(s): Toxic
Marine Pollutant: Yes, due to extreme aquatic toxicity
Special Transport Precautions: Secure tightly, transport only by licensed carriers, label packages clearly with hazard and warning signs
Regulatory Agency Requirements: Check IATA, IMDG, DOT or other regional regulations for up-to-date requirements

Regulatory Information

OSHA Standards: Considered hazardous by OSHA Hazard Communication Standard (29 CFR 1910.1200)
SARA Title III: Listed as an immediate (acute) and delayed (chronic) health hazard
TSCA Inventory: Compound appears on inventory but restrictions apply
REACH Status (EU): Subject to notification and restriction procedures
State Right-to-Know: Included on hazardous substance lists for California, New Jersey, Massachusetts
Other International Inventories: Japanese ENCS, Canadian DSL status should be checked for compliance
Hazard Symbols: T (Toxic), N (Dangerous for environment)