MSDS for Tungsten Crucible

Identification

Product Name: Tungsten Crucible
Chemical Formula: W
CAS Number: 7440-33-7
Recommended Use: High temperature processes, laboratory and industrial applications
Manufacturer: Supplier details found on packaging label or purchase documentation
Contact Information: Emergency telephone and address provided by supplier
Synonyms: Wolfram crucible, metallic tungsten container
Other Names: Tungsten boat, Tungsten container

Hazard Identification

GHS Classification: Not classified as hazardous under GHS
Physical Hazards: Sharp edges may cause cuts; heavy objects can result in crush injuries
Health Hazards: Inhalation of tungsten dust may irritate the lungs; solid form presents minimal inhalation risk
Environmental Hazards: Expected to have low environmental impact in solid form
Label Elements: None required; precaution with dust or machining
Precautionary Statements: Avoid creating dust, wear protective gear during handling

Composition / Information on Ingredients

Chemical Name: Tungsten
Common Name: Tungsten
Concentration: ≥99.95%
Impurities: May contain trace metals such as iron, molybdenum, tantalum, silicon, aluminum, calcium, carbon
Molecular Weight: 183.84 g/mol
Hazardous Components: No hazardous components over threshold limit

First Aid Measures

Inhalation: Take person into fresh air, consult a doctor if symptoms (cough, shortness of breath) persist after dust exposure
Skin Contact: Remove particles, flush with soap and water, seek medical attention for persistent irritation or cuts
Eye Contact: Rinse immediately with plenty of water for several minutes if dust or fragments enter, consult medical attention for irritation
Ingestion: Rinse mouth, seek medical attention if large quantities of particles swallowed
General Advice: Seek medical advice for all injuries that do not resolve quickly or become infected

Fire-Fighting Measures

Suitable Extinguishing Media: Use dry chemical, sand, or special powder for metal fires; water may be ineffective and hazardous for metal dust
Specific Hazards: Fine tungsten dust may be combustible in air at high temperatures
Hazardous Combustion Products: Tungsten oxides
Protective Equipment: Full protective clothing, self-contained breathing apparatus recommended for fire involving dust
Additional Information: Avoid breathing fumes, keep combustibles away, do not use water directly on fires involving powder or dust

Accidental Release Measures

Personal Precautions: Wear safety goggles, gloves, and dust mask if handling dust or small fragments; avoid breathing powder
Environmental Precautions: Prevent spillage from entering drains or water systems when dealing with powder
Methods for Clean-up: Pick up solids mechanically; sweep or vacuum dust using equipment designed for fine metal particles
Handling of Waste: Dispose of in accordance with local regulations; place material in labeled, sealed containers
Additional Measures: Ventilate area if dust has been generated

Handling and Storage

Handling: Use caution to prevent cuts from sharp edges, avoid creating or inhaling dust, use tools for heavy lifting
Storage Requirements: Store in cool, dry, well-ventilated location
Incompatible Materials: Avoid contact with oxidizing agents, acids, and bases that could react with fine particles
Safe Storage Containers: Keep in original container or corrosion-resistant materials
Other Considerations: Separate from strong acids and oxidizers; label storage container clearly

Exposure Controls and Personal Protection

Occupational Exposure Limits: OSHA TWA 5 mg/m³ (insoluble compounds, as W)
Engineering Controls: Ensure adequate ventilation, use local exhaust when machining or grinding
Personal Protective Equipment: Safety goggles, gloves, dust-resistant clothing
Respiratory Protection: Use NIOSH-approved mask for dust
Hand Protection: Cut-resistant gloves
Eye Protection: Safety glasses with side shields
Special Hygiene Measures: Wash hands after handling, do not eat or drink in processing areas

Physical and Chemical Properties

Appearance: Grey, metallic solid
Odor: Odorless
Melting Point: 3422°C
Boiling Point: 5555°C
Density: 19.3 g/cm³
Solubility: Insoluble in water
Vapor Pressure: Negligible
pH: Not applicable
Flash Point: Not applicable (non-flammable in solid form)
Auto-Ignition Temperature: Not applicable
Evaporation Rate: Not applicable

Stability and Reactivity

Chemical Stability: Stable under ambient temperatures and pressures
Possibility of Hazardous Reactions: Fine powder may ignite in the presence of strong oxidizers or at high temperatures
Conditions to Avoid: High temperatures, open flames, strong acids or oxidizers
Incompatible Materials: Chlorine, fluorine, halogenated compounds, concentrated acids
Hazardous Decomposition Products: Tungsten oxides formed by strong heating or burning

Toxicological Information

Acute Toxicity: Low toxicity in solid state; inhalation of fine dust can cause mild respiratory irritation
Chronic Effects: Prolonged exposure to dust may cause lung changes; existing respiratory conditions may be worsened
Skin Contact: No evidence of significant effects except for cuts from sharp edges
Eye Contact: Dust can be mildly irritating
Ingestion: Little to no absorption; generally non-toxic in small quantities
Carcinogenicity: Not classified as carcinogenic by OSHA, IARC, NTP
Reproductive Toxicity: No known effects
Sensitization: No known sensitizing effects reported

Ecological Information

Ecotoxicity: Not expected to harm aquatic or terrestrial life in bulk, solid form
Mobility: Insoluble, tends to remain where released in the environment
Persistence and Degradability: Elemental tungsten does not biodegrade
Bioaccumulative Potential: Does not accumulate in living organisms
Additional Ecological Information: Tungsten powder should not be released in large quantities to prevent potential accumulation in soil or sediment

Disposal Considerations

Waste Disposal Methods: Dispose of unused material and waste according to local, regional, and national regulations
Contaminated Packaging: Treat packaging as industrial waste, clean and recycle if safe and permitted
Recycling: Tungsten scrap may be recycled where facilities exist
Special Precautions: Avoid release of powder to water courses or soil

Transport Information

UN Number: Not regulated
Proper Shipping Name: Not dangerous goods
Hazard Class: Not applicable
Packing Group: Not applicable
Environmental Hazards: None in transport
Special Transport Precautions: Avoid crushing or bending containers, avoid dust formation during transport
Labeling Requirement: No specific hazard label required for solid form

Regulatory Information

US Regulations: Listed on TSCA inventory, not regulated as hazardous
EU Regulations: Listed on EINECS, not classified as hazardous under CLP/GHS
Workplace Regulations: Refer to OSHA and local labor authority for occupational exposure limits
REACH Status: Exempt as an element
Further Information: Follow all applicable local, regional, and international regulations covering labor, safety, and the environment; consult supplier for updates on regulatory requirements