Material Safety Data Sheet: Bismuth Sulfide

Identification

Product Name: Bismuth Sulfide
Chemical Formula: Bi2S3
CAS Number: 1345-07-9
Synonyms: Bismuth(III) sulfide, bismuth sulphide
Recommended Use: Laboratory chemical, manufacturing of semiconductors, thermoelectric materials
Manufacturer Information: Name, address, emergency phone number available through chemical supplier
Relevant Uses: Often used in material research, pigment production, and high purity applications
Emergency Contact: Refer to local regulations for national poison control centers

Hazard Identification

GHS Classification: Not classified as hazardous according to current GHS criteria
Pictogram: No symbol required
Signal Word: None
Hazard Statements: May cause mild irritation if inhaled or contacted with the skin or eyes
Precautionary Statements: Avoid inhalation of dust, avoid prolonged or repeated contact
Routes of Exposure: Eyes, skin, inhalation
Health Effects: No chronic toxicity expected, but acute exposure can lead to mild respiratory discomfort
Potential Environmental Effects: Not expected to pose significant hazard in normal use, but dust dispersion should be minimized

Composition / Information on Ingredients

Chemical Name: Bismuth Sulfide
CAS Number: 1345-07-9
Concentration: 99–100%
Impurities: Trace metal impurities less than 0.1% may be present
Formula: Bi2S3
Molecular Weight: 514.15 g/mol

First Aid Measures

Inhalation: Move person to fresh air, seek medical attention if symptoms occur
Skin Contact: Remove contaminated clothing, wash skin with plenty of water and soap
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present
Ingestion: Rinse mouth with water, do not induce vomiting, seek medical attention
Most Important Symptoms: Mild irritation, coughing, red or dry skin, eye redness
Notes for Physicians: Treat symptomatically, no antidote known

Fire-Fighting Measures

Suitable Extinguishing Media: Use dry chemical, CO2, foam, or water spray
Unsuitable Extinguishing Media: Do not use strong water jet
Special Hazards: In a fire, bismuth and sulfur oxides may form, toxic fumes possible
Protective Equipment: Firefighters wear self-contained breathing apparatus and protective clothing
Specific Methods: Move containers from fire area if safe, avoid breathing dust, fumes or vapors

Accidental Release Measures

Personal Protection: Use gloves, safety goggles, and dust mask
Environmental Precautions: Prevent entry into drains, waterways, and soil
Cleanup Methods: Sweep up and collect spillage in suitable containers for disposal, avoid creating dust
Handling Contaminated Material: Wash area with water, ventilate space
Disposal: See Disposal Considerations section

Handling and Storage

Safe Handling: Use only in well-ventilated areas, minimize dust generation, avoid contact with eyes and skin
Hygiene Measures: Wash hands after use, do not eat or drink when handling
Storage Conditions: Store in tightly closed containers in a cool, dry place, away from incompatible materials such as strong acids or oxidizers
Incompatibilities: Strong acids, strong bases, oxidizing agents
Other Precautions: Keep material away from children and unauthorized users

Exposure Controls and Personal Protection

Exposure Limits: No established occupational exposure limits for bismuth sulfide
Engineering Controls: Use local exhaust ventilation
Personal Protection: Safety goggles, gloves resistant to chemicals, dust mask or respirator for dust-generating operations
Environmental Exposure Controls: Avoid release to the environment, use collection systems for dust
Hygiene Facilities: Handwashing stations recommended in work area

Physical and Chemical Properties

Appearance: Gray to black crystalline powder
Odor: Odorless
Melting Point: Around 685°C
Boiling Point: Decomposes at high temperatures
Solubility: Insoluble in water
Density: 6.8 g/cm³
pH: Not applicable in solid form
Vapor Pressure: Not applicable
Flash Point: Non-flammable
Partition Coefficient (n-octanol/water): Not applicable
Evaporation Rate: Not volatile
Upper/lower flammability or explosive limits: Not applicable

Stability and Reactivity

Chemical Stability: Stable under normal conditions of temperature and pressure
Reactivity: No hazardous reactions under normal handling
Possible Hazardous Reactions: Reacts with acids to produce hydrogen sulfide gas
Conditions to Avoid: Excessive heat, moisture, exposure to acids
Incompatible Materials: Strong acids, oxidizers
Hazardous Decomposition Products: Bismuth oxides, sulfur oxides, hydrogen sulfide under extreme conditions

Toxicological Information

Likely Exposure Routes: Inhalation, skin and eye contact
Acute Toxicity: Not classified as acutely toxic, no LD50 available for bismuth sulfide
Skin/Eye Irritation: May cause mild irritation on direct contact
Respiratory Effects: Dust may cause mild irritation or coughing
Sensitization: Not reported
Carcinogenicity: Bismuth compounds not classified as carcinogens by IARC, OSHA, or NTP
Mutagenicity: No data indicating mutagenic effects
Reproductive Toxicity: No evidence found for reproductive or developmental toxicity
Chronic Effects: No chronic health effects reported with proper handling

Ecological Information

Ecotoxicity: Low expected hazard, limited data; heavy metal sulfides can impact aquatic ecosystems if released
Persistence and Degradability: Inorganic compound not readily biodegradable
Bioaccumulative Potential: Not expected to bioaccumulate under typical environmental conditions
Mobility in Soil: Low mobility, adheres to soil and sediment
Other Adverse Effects: Avoid release to the natural environment; caution for chronic exposure to bismuth or sulfur compounds

Disposal Considerations

Waste Treatment: Dispose of in accordance with local, regional, and national laws
Recommended Disposal Method: Place in tightly sealed and labeled containers for hazardous waste collection
RCRA Status: Not classified as hazardous waste under RCRA in the United States
Waste Code: See local regulations, typically not assigned standard waste code for bismuth compounds
Special Precautions: Do not discharge to sewer systems, prevent dispersion as dust

Transport Information

UN Number: Not regulated as a dangerous good
UN Proper Shipping Name: Bismuth Sulfide
Transport Hazard Class: None assigned
Packing Group: None assigned
Marine Pollutant: Not classified
Labeling Requirements: Normal precautions for chemical powders; no special DOT, IMO, or IATA labeling
Special Transport Measures: Ensure packaging is secure to prevent leaks or dust release

Regulatory Information

OSHA Status: Not specifically regulated under OSHA Hazard Communication Standard
TSCA Inventory: Listed
SARA Title III: Not listed as extremely hazardous or toxic chemical
California Prop 65: Not listed
WHMIS Classification: Not listed as a controlled product in Canada
Europe REACH: Not subject to registration under Annex XVII or XIV
Other Regulations: Observe all national and regional chemical safety and environmental regulations