Material Safety Data Sheet: Tungsten Coil

Identification

Product Name: Tungsten Coil
Chemical Name: Tungsten
CAS Number: 7440-33-7
Recommended Use: Heating elements, electron tubes, filament production, X-ray equipment
Supplier: Contact supplier or manufacturer for specific details
Emergency Contact: Refer to local regulations or supplier contact information

Hazard Identification

Classification: Not classified as hazardous under GHS criteria
Physical Hazards: Dust particles in air may be mildly irritating
Health Hazards: Prolonged exposure to dust can cause irritation to eyes, skin, and respiratory tract
Environmental Hazards: Not considered hazardous to aquatic life at typical quantities
Label Elements: No specific pictograms required
Signal Word: None
Hazard Statement: May cause mechanical irritation

Composition / Information on Ingredients

Chemical Formula: W
Ingredient: Tungsten
Percent Purity: 99.9% or above
Impurities: Trace elements such as iron, silicon, tantalum possibly present in negligible quantities

First Aid Measures

Inhalation: Move affected individual into fresh air and monitor for breathing difficulties; seek medical advice if symptoms do not resolve
Skin Contact: Wash thoroughly with soap and water; remove any contaminated clothing
Eye Contact: Rinse eyes gently with running water for several minutes; obtain medical attention for persistent irritation
Ingestion: Rinse mouth; consult a physician if large amount ingested or symptoms develop

Fire-Fighting Measures

Flammability: Not flammable in bulk form; fine dust can pose a fire or explosion risk
Suitable Extinguishing Agents: Use dry chemical, sand, or carbon dioxide; avoid use of water on burning metal
Specific Hazards: High-temperature fires may produce tungsten oxides
Protective Equipment for Firefighters: Wear self-contained breathing apparatus and protective clothing

Accidental Release Measures

Personal Precautions: Use appropriate protective equipment to prevent dust inhalation; avoid skin and eye contact
Environmental Precautions: Prevent dispersion of fine dust into environment
Cleanup Methods: Carefully collect spilled material using tools and store in suitable containers for recycling or disposal; minimize dust generation by dampening surfaces or using vacuum with HEPA filter

Handling and Storage

Handling: Handle with care to avoid mechanical abrasion and dust formation; use adequate ventilation in areas with possible dust generation
Hygiene Measures: Wash hands after handling; avoid eating, drinking, or smoking near material
Storage: Store in a dry, cool, well-ventilated area away from incompatible substances such as oxidizers; keep containers tightly closed

Exposure Controls and Personal Protection

Engineering Controls: Local exhaust ventilation recommended for dust-producing processes
Exposure Limits: OSHA PEL for tungsten (as metal): 5 mg/m³, ACGIH TLV: 5 mg/m³ for soluble tungsten compounds
Respiratory Protection: Use NIOSH-approved respirators when dust is generated
Eye Protection: Safety glasses with side shields
Skin Protection: Protective gloves and long-sleeved clothing for prolonged or repeated handling
Other Protection: Maintain eyewash station and emergency shower where material is handled

Physical and Chemical Properties

Appearance: Gray to silver brittle solid or filament
Odor: Odorless
Melting Point: 3422°C
Boiling Point: 5555°C
Density: 19.25 g/cm³
Solubility: Insoluble in water
Vapor Pressure: Negligible at room temperature
Molecular Weight: 183.84 g/mol
Decomposition Products: Not applicable under normal conditions

Stability and Reactivity

Chemical Stability: Stable under ordinary conditions of use and storage
Reactivity: Reacts with strong oxidizers at elevated temperatures
Hazardous Reactions: Combustion or reaction with oxidizers may produce tungsten oxides
Incompatible Materials: Strong acids, strong oxidizing agents such as nitrates or halogens
Hazardous Decomposition Products: Tungsten oxides if subject to high temperatures or combustion

Toxicological Information

Acute Toxicity: Low; tungsten metal considered to have minimal toxicity by ingestion or inhalation at normal concentrations
Chronic Effects: Repeated or prolonged exposure to dust may cause mild respiratory irritation
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, or OSHA
Other Health Effects: May cause mechanical eye or skin irritation on direct contact
Sensitization: No evidence of skin or respiratory sensitization in humans

Ecological Information

Ecotoxicity: Low toxicity to aquatic and terrestrial organisms at standard concentrations
Persistence and Degradability: Elemental tungsten is not biodegradable; remains in environment as stable metal
Bioaccumulative Potential: No evidence of significant bioaccumulation
Mobility in Soil: Limited mobility due to insolubility
Other Environmental Effects: Not expected to pose significant environmental hazard in bulk form

Disposal Considerations

Disposal Methods: Collect and recycle material where feasible; for waste disposal, use approved industrial landfill in compliance with local, state, and federal regulations
Contaminated Packaging: Rinse and recycle or dispose of packaging as appropriate
Special Precautions: Avoid uncontrolled release of dust into environment during disposal operations

Transport Information

DOT Classification: Not regulated as a hazardous material
UN Number: Not applicable
Proper Shipping Name: Tungsten
Packing Group: Not applicable
Transport Hazard Class: Not applicable
Environmental Hazards during Transport: None identified

Regulatory Information

U.S. OSHA Status: Not regulated as a hazardous substance
SARA 313: Not listed
TSCA Status: Listed
REACH Registration: Compliant for European markets if sourced from registered producer
WHMIS Classification (Canada): Not classified
Other Regulations: Comply with local, regional, national, and international regulations regarding handling and disposal