MSDS – Molybdenum-Rhenium Alloy

Identification

Product Name: Molybdenum-Rhenium Alloy
Chemical Formula: Mo-Re
Common Synonyms: MoRe, molybdenum-rhenium, rhenium alloyed with molybdenum
Intended Use: Manufacturing components for aerospace, electronics, and medical devices
Supplier Contact: Contact manufacturing or distributor representative
Emergency Phone Number: Refer to local poison control or company line provided on container
Date of Latest Revision: See label or ask manufacturer for up-to-date document

Hazard Identification

OSHA Status: Material considered relatively non-hazardous in solid state, airborne dust or powder requires attention
Physical Hazards: Fine particulate formation poses risk of explosion, especially in confined space without ventilation
Health Hazards: Chronic inhalation of dust can irritate respiratory tract, potential for generalized metal fume fever, risk of skin or eye irritation
Environmental Hazards: Accumulation in aquatic settings considered possible harmful to aquatic life
GHS Classification: Not classified as hazardous in bulk, but lab-generated dust may fall under “hazardous particulate” category
Precautionary Statements: Keep dust concentration below occupational limits, use engineering controls to contain powder

Composition / Information on Ingredients

Component 1: Molybdenum (Mo) – CAS No: 7439-98-7 – Range: 47–93%
Component 2: Rhenium (Re) – CAS No: 7440-15-5 – Range: 7–53%
Impurities: May contain trace amounts of tungsten, oxygen, carbon, or iron as specified by manufacturer

First Aid Measures

Inhalation: Move exposed individuals to fresh air, keep at rest, seek medical attention for difficulty breathing
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water
Eye Contact: Rinse eyes gently with water for 15 minutes or until irritation subsides, obtain medical help for persistent discomfort
Ingestion: Not considered route of exposure, seek immediate medical care if symptoms occur after accidental ingestion

Fire-Fighting Measures

Suitable Extinguishing Media: Use dry powder, sand, or carbon dioxide for powder fires; water not advised on fine particles
Unsuitable Extinguishing Media: Avoid direct stream of water on dust–potential to spread burning particles
Specific Hazards: Combustion of dust forms toxic fumes, fire can create metal oxide smoke
Protective Equipment for Firefighters: Full face respirator, protective gloves, turnout gear; avoid exposure to metal fumes

Accidental Release Measures

Personal Precautions: Wear dust mask or respirator, use gloves and safety goggles, prevent inhalation or contact with skin
Environmental Precautions: Prevent entry into drains, sewers, and watercourses, avoid dispersing dust into atmosphere
Methods for Containment and Cleaning: Gather spilled material using static-free tools, collect in sealable container, ventilate area

Handling and Storage

Precautions for Safe Handling: Handle powder in well-ventilated setting, avoid generation of fine dust, follow good hygiene practice after use
Storage Conditions: Store in dry, cool location, keep container closed, isolate from acids and sources of ignition
Incompatible Materials: Avoid direct contact with oxidizers, halogens, or interhalogens

Exposure Controls and Personal Protection

Engineering Controls: Use local exhaust ventilation at points of dust generation, install HEPA filtration where airborne particulate exceeds threshold limit
Personal Protective Equipment (PPE): Wear safety glasses or goggles, use gloves resistant to metals, NIOSH-approved respirator if airborne dust exceeds exposure limits
Occupational Exposure Limits: Molybdenum: ACGIH TLV 10 mg/m³ (inhalable, as metal), Rhenium: no established OSHA exposure limit, reference local guidelines
Hygiene Measures: Wash hands and face before breaks and after handling, remove contaminated clothing before eating or smoking

Physical and Chemical Properties

Form: Solid, bulk rod, wire, or powdered form
Color: Grayish, metallic luster
Melting Point: Mo-Re alloys, range 2,625–2,830°C (depending on composition)
Boiling Point: Above 4,000°C
Density: Varies with blend, typical 12–21 g/cm³
Solubility: Not soluble in water
Odor: Odorless
Other Properties: Conductive to electricity and heat, robust against corrosion

Stability and Reactivity

Chemical Stability: Stable in typical storage and processing environments
Reactive Materials: Exposure to strong acids, oxidizing agents, chlorine or halogens increases risk of reaction
Hazardous Decomposition: Fumes or oxides of molybdenum and rhenium on combustion
Polymerization: No polymerization hazard recorded

Toxicological Information

Acute Effects: Inhalation of powder or dust may trigger irritation to nose, throat, and lungs, especially in poorly controlled fabrication setups
Chronic Exposure Risks: Prolonged exposure linked to metal fume fever, possible pulmonary granulomas, rare cases of gastrointestinal symptoms from long-term overexposure
Skin and Eye Contact: Minor irritant, heightened risk in mechanically abraded or cut skin
Ingestion: Not regarded as toxic at levels encountered from contamination in workplace

Ecological Information

Toxicity to Aquatic Life: Bulk metal low hazard, but fine particulate may prove mildly toxic to aquatic invertebrates
Persistence and Degradability: Metal alloy resists breakdown, negligible biological degradation
Bioaccumulation Potential: No significant data supports major risk, persistent material in environment
Environmental Mobility: Fine dust may travel in water runoff after improper disposal, disposal as hazardous waste prevents spread

Disposal Considerations

Waste Treatment Methods: Recycle clean alloy if feasible, otherwise dispose of as hazardous metal waste according to local regulations
Special Precautions: Avoid discharge into environment; contact local waste management service for pick-up of contaminated products
Container Disposal: Decontaminate reusable packaging, non-recycling containers must go to hazardous waste landfill

Transport Information

UN Number: Not regulated for transport as solid, refer to HazMat guidelines if shipping powder in quantities above threshold
Shipping Name: Molybdenum alloy, Rhenium alloy, non-flammable solid
Hazard Class: Not classified as dangerous goods in bulk; consult IATA, IMDG, or DOT for specifics
Packing Group: None for solid metal, check material state for each shipment
Transport Precautions: Secure package, prevent release of metal dust, label containers clearly

Regulatory Information

US Regulations: SARA 313 reporting not required for these pure metals, OSHA regulates dust exposure, TSCA inventory lists both metals
International Guidelines: Complies with REACH for registration where required, follow EU and Asian import/export controls
Labeling: Provide appropriate hazard statements regarding dust inhalation and PPE recommendation