Material Safety Data Sheet - Molybdenum Sheet

Identification

Product Name: Molybdenum Sheet
Chemical Name: Molybdenum
Synonyms: Mo Metal Sheet
CAS Number: 7439-98-7
Recommended Use: Industrial, scientific, and manufacturing applications
Supplier/Manufacturer: Specified by supplier details
Contact Information: Emergency telephone number provided by the supplier
Emergency Overview: Dense, silvery-gray metal sheet with no significant odor; for fabricators and end users in research or industrial settings.

Hazard Identification

GHS Classification: Not classified as hazardous
Signal Word: None
Hazard Statements: Limited health hazards in solid form, dust or fumes may irritate the eyes, skin, and respiratory tract
Precautionary Statements: Avoid breathing dust, avoid long-term exposure to particles, wash hands thoroughly after handling
Pictograms: None required under normal conditions
Physical Hazards: Metal sheet may have sharp edges, handle with cut-resistant gloves
Health Hazards: Inhalation of generated dust or fume possible during processing such as grinding or welding
Environmental Hazards: May have limited impact on environment in metallic form, dust release may require containment.

Composition / Information on Ingredients

Substance: Molybdenum
Chemical Formula: Mo
Purity: 99.9% or higher typically
Impurities: Trace metal impurities depending on producer, often below regulatory thresholds
Component Exposure Limits: Occupational exposure limit for dust and fumes varies by region
Other Components: No additives, binders, or contaminants intentionally present
Physical State: Sheet form, rolled and cut to size for end user requirements.

First Aid Measures

Inhalation: Move to fresh air, seek medical attention if symptoms develop such as coughing, sneezing, or shortness of breath
Skin Contact: Remove contaminated clothing and wash skin with soap and water to prevent irritation from dust
Eye Contact: Rinse cautiously with water for at least 15 minutes, remove contact lenses if present and easy to do, seek medical care for persistent irritation
Ingestion: Rinse mouth with water, do not induce vomiting, seek medical advice
Symptoms: Possible irritation of the respiratory tract, mechanical irritation to eyes or skin from particles or sharp edges
Notes to Physician: Treatment should address symptoms; exposure to dust more significant in fabrication processes.

Fire-Fighting Measures

Extinguishing Media: Use class D dry powder extinguishers for metal fires, do not use water or carbon dioxide on burning metal
Special Hazards: Finely divided molybdenum may be combustible; solid sheets present low risk
Hazardous Combustion Products: Metal oxides may form if material burns
Protective Equipment: Full protective gear and self-contained breathing apparatus
Firefighting Procedures: Isolate area, control burning dust carefully; do not spread particles by using high-pressure fire streams
Thermal Decomposition: At very high temperatures, may release molybdenum oxides.

Accidental Release Measures

Personal Precautions: Wear cut-resistant gloves, safety glasses, dust mask where fine particles generated
Environmental Precautions: Prevent dust or filings from entering drains or waterways
Cleanup Methods: Gather spilled sheets carefully; clean up dust using wet methods or HEPA-filtered vacuum
Handling of Fines: Store collected dust and filings in approved containers for disposal or recycling
Spill Response: Control area to prevent spread of small particles, ventilate if excessive dust present.

Handling and Storage

Safe Handling: Avoid generating dust, handle sheets with care to avoid cuts, use tongs for large pieces when necessary
Personal Protection: Wear gloves, safety glasses, and approved respirator if machining or sanding
Storage Conditions: Store in a dry, well-ventilated place away from moisture and incompatible materials such as strong acids
Specific Requirements: Avoid stacking materials unsafely; label containers and storage units clearly
Incompatibilities: Avoid contact with oxidizing agents, halogens, and acids to prevent reaction
Engineering Controls: Use local exhaust ventilation during processing generating dust or fumes.

Exposure Controls and Personal Protection

Occupational Exposure Limits: OSHA PEL for insoluble compounds (15 mg/m³ total dust, 5 mg/m³ respirable), ACGIH TLV for molybdenum (0.5 mg/m³ as soluble compounds, 3 mg/m³ as insoluble)
Engineering Controls: Local exhaust ventilation and enclosure of processing operations generating fine particles or fumes
Personal Protective Equipment: Safety glasses or goggles, gloves for mechanical work, NIOSH-approved respirator in dusty environments
Hygiene Measures: Wash hands before eating or drinking, do not smoke in processing areas, change contaminated clothes
Monitoring Procedures: Periodic air sampling in fabrication areas using appropriate methods to ensure limits are not exceeded.

Physical and Chemical Properties

Appearance: Silvery-gray sheet, metallic luster, solid
Odor: Odorless
Melting Point: 2623°C (4753°F)
Boiling Point: 4639°C (8382°F)
Density: 10.28 g/cm³
Solubility: Insoluble in water
Vapor Pressure: Negligible under standard conditions
Molecular Weight: 95.95 g/mol
Other Physical Properties: High compressive strength, low thermal expansion, very good electrical conductivity, highly resistant to corrosion
pH: Not applicable in solid form.

Stability and Reactivity

Chemical Stability: Stable under normal storage and use conditions
Thermal Decomposition: Oxidizes at high temperature, forms molybdenum oxides
Incompatible Materials: Reacts with strong oxidizing agents, halogens, acids
Hazardous Polymerization: Does not polymerize
Conditions to Avoid: High temperatures beyond melting point, prolonged exposure to moisture may cause surface oxidation
Decomposition Products: Produces metal oxides if exposed to fire or excessive heat
Reactivity: Generally unreactive, except in extreme chemical environments.

Toxicological Information

Routes of Exposure: Inhalation of dust or fumes, skin/eye contact with fine particles or filings
Health Effects: Short-term exposure may cause minor irritation of the eyes, skin, and respiratory tract; long-term exposure to airborne dust or fumes can lead to lung changes in laboratory animals
Chronic Effects: No conclusive evidence for human toxic effects from metallic molybdenum, but caution warranted for dust exposure
Carcinogenicity: Not listed as carcinogenic by NTP, IARC, or OSHA
Sensitization: No documented allergy or sensitization cases
Acute Toxicity Data: LD50 (oral, rat): >5000 mg/kg; indicates low acute toxicity
Other Findings: Large doses of soluble compounds may affect kidney and liver in experimental animals.

Ecological Information

Environmental Fate: Solid metallic sheet unlikely to leach or dissolve, not mobile in soil
Aquatic Toxicity: Insoluble metal presents low risk to aquatic life in bulk form; soluble molybdenum compounds may affect aquatic species at high concentrations
Persistence and Degradability: Not biodegradable, resists decomposition under most natural conditions
Bioaccumulation: Low potential in metallic sheet form
Other Environmental Data: Dust from mechanical processing should be contained to prevent environmental contamination; regulatory limits apply to discharges in some jurisdictions.

Disposal Considerations

Waste Disposal Methods: Dispose of sheets and dust in accordance with local, regional, or national regulations; recycling is strongly encouraged where possible
Contaminated Packaging: Clean or recycle containers in compliance with environmental regulations
Special Precautions: Secure all waste to prevent environmental release, especially fine particles
Landfill Statement: If placed in landfill, must meet all applicable regulatory requirements for heavy metal residues
Incineration: Do not incinerate without proper emissions controls in place due to release of metal oxides.

Transport Information

UN Number: Not regulated for ground, air, or water transport in solid sheet form
Proper Shipping Name: Molybdenum Metal, not classified as hazardous material
Transport Hazard Classes: None required
Packing Group: Not applicable
Special Precautions for Transport: Secure to prevent shifting during transport, label containers with product name and warnings where applicable
Other Transport Notes: Dust or powder must be contained to avoid spillage, but sheet form presents low risk.

Regulatory Information

OSHA: Molybdenum and its compounds regulated under the Hazard Communication Standard; exposure limits must be observed
EPA: Not listed under major U.S. hazardous substances; waste must be managed in accordance with federal and state regulations
TSCA: Listed in the U.S. Toxic Substances Control Act Inventory
SARA Title III: Not subject to reporting requirements under Section 313 for pure molybdenum
REACH (EU): Registered substance; Safety Data Sheet requirements apply
Other Regulations: Compliance with local and international workplace safety, environmental, and transportation laws as applicable
Labeling Requirements: Sheet products must include hazard communication in relevant languages as per jurisdiction.