Molybdenum Rod Material Safety Data Sheet

Identification

Product Name: Molybdenum Rod
Chemical Name: Molybdenum
CAS Number: 7439-98-7
Recommended Use: Manufacturing, research, electrical contacts, vacuum tube components
Supplier Details: Name, address, phone number of supplier/manufacturer
Emergency Contact Number: 24-hour emergency hotline available for chemical incidents

Hazard Identification

GHS Classification: Not classified as hazardous under GHS
Hazard Symbols: None
Signal Word: None
Hazard Statements: May cause mechanical irritation to eyes, skin, or respiratory tract, especially as dust or particulate
Precautionary Statements: Avoid breathing dust, wear protective clothing, wash thoroughly after handling
Potential Health Effects: Prolonged inhalation of dust may cause lung irritation, eye or skin contact may result in mild irritation

Composition / Information on Ingredients

Chemical Name: Molybdenum
Synonyms: Metallic Molybdenum
CAS Number: 7439-98-7
Concentration: 99.9% or greater
Impurities: Trace amounts of other metals such as Fe, Ni, Cu, none present at hazardous concentration levels

First Aid Measures

Inhalation: Move to fresh air, seek medical attention if irritation or symptoms persist
Skin Contact: Wash with soap and water, remove contaminated clothing, seek medical attention if irritation develops
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, consult doctor if irritation persists
Ingestion: Rinse mouth, seek medical advice, do not induce vomiting unless directed by medical personnel

Fire-Fighting Measures

Suitable Extinguishing Media: Dry chemical, sand, graphite, or CO₂ extinguishers recommended, avoid water
Specific Hazards: Fine dust may form explosive mixtures with air
Special Protective Equipment: Firefighters use self-contained breathing apparatus and full protective gear
Combustion Products: May release metal oxide fumes under extreme heat

Accidental Release Measures

Personal Precautions: Use respiratory protection for dust, avoid contact with skin and eyes
Spill Clean-up: Sweep up using methods that minimize dust generation, place in appropriate closed containers for disposal
Environmental Precautions: Prevent further leakage or spillage if safe, avoid discharge into the environment, cover drains

Handling and Storage

Handling: Use in well-ventilated areas, avoid creating or inhaling dust, utilize recommended personal protective equipment
Storage: Store in dry, cool, well-ventilated place, keep container tightly closed, store away from acids and strong oxidizers, ensure containers labeled appropriately
Incompatibilities: Avoid contact with strong acids, oxidizing agents

Exposure Controls and Personal Protection

Exposure Limits: OSHA PEL: 5 mg/m³ (respirable), ACGIH TLV: 5 mg/m³
Engineering Controls: Local exhaust ventilation or dust collection to reduce airborne particulates
Personal Protection: Use protective gloves, safety goggles, long-sleeved clothing, and approved dust respirator when handling powder or during machining
Work Hygienic Practices: Wash hands before breaks and immediately after handling

Physical and Chemical Properties

Appearance: Silver-gray metallic solid, generally in cylindrical rod form
Odor: Odorless
Melting Point: 2623°C
Boiling Point: 4639°C
Density: 10.2 g/cm³
Solubility: Insoluble in water
Vapor Pressure: Negligible at room temperature
pH: Not applicable
Other Properties: High thermal and electrical conductivity, stable under normal conditions

Stability and Reactivity

Chemical Stability: Stable under normal handling and storage conditions
Reactivity: Inert in most environments
Conditions to Avoid: Formation of dust clouds, contact with strong acids or oxidizing agents
Hazardous Decomposition Products: Metal oxide fumes under extreme heat or combustion
Possibility of Hazardous Reactions: Not known under normal conditions

Toxicological Information

Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Effects: Dust inhalation may cause transient respiratory irritation, eye or skin contact can cause mild irritation
Chronic Effects: Repeated or prolonged exposure to high dust concentrations may cause respiratory tract inflammation
Carcinogenicity: Not listed as carcinogenic by IARC, NTP, or OSHA
Mutagenicity: No data available indicating mutagenic effects
Other Data: Animal studies show low toxicity for elemental molybdenum; most effects observed with higher doses or soluble compounds

Ecological Information

Environmental Impact: Insoluble molybdenum metal poses minimal immediate hazard to aquatic or terrestrial environments in rod form
Persistence and Degradability: Stable, not prone to degradation
Bioaccumulation Potential: Not expected to bioaccumulate
Mobility in Soil: Limited mobility predicted due to physical state
Other Effects: Molybdenum compounds can be toxic to aquatic organisms at high concentrations, risk mainly for fine dust or powder released to environment

Disposal Considerations

Waste Disposal Methods: Collect waste material in sealed containers, dispose in accordance with local, regional, and national regulations
Special Precautions: Prevent dust formation, avoid disposal in municipal sewage systems
Reuse/Recycling: Metal scrap may be recycled if uncontaminated, consult appropriate facilities

Transport Information

UN Number: Not regulated as hazardous material for transport
Proper Shipping Name: Molybdenum Metal
Hazard Class: Not classified
Packing Group: Not assigned
Transport Precautions: Secure containers to prevent shifting, protect from moisture and physical damage, label clearly per regulations

Regulatory Information

OSHA Status: Not considered hazardous by OSHA standards
TSCA Inventory: Listed
SARA Title III: Not listed as extremely hazardous
California Proposition 65: Not listed
International Regulations: Molybdenum reported under EU REACH, no special restrictions on metallic form
Other TSCA, DSL, EINECS Numbers: All applicable inventory numbers are covered