Molybdenum Hydroxide MSDS
Identification
Product Name: Molybdenum Hydroxide
Chemical Formula: Mo(OH)2
Other Names: Molybdic Hydroxide, Molybdenum(IV) Hydroxide
CAS Number: 12619-41-3
Synonyms: Dihydroxomolybdenum, Molybdenum-4-hydroxide
Recommended Use: Laboratory chemicals, catalyst production, research applications
Manufacturer/Supplier: (supplier details)
Emergency Contact: (contact information)
Hazard Identification
Classification: Skin irritant, eye irritant, hazardous if ingested, specific target organ toxicity after single exposure
Signal Word: Warning
Hazard Statements: Causes skin irritation, causes serious eye irritation, may cause respiratory irritation
Pictograms: Exclamation mark (GHS07)
Precautionary Statements: Wash hands after handling, avoid breathing dust, wear protective gloves, use eye protection
Health Hazards: Prolonged exposure leads to inflammation of mucosal membranes, coughing, respiratory discomfort
Environmental Hazards: Harmful to aquatic organisms, causes long term adverse effects in the aquatic environment
Physical Hazards: Dust can form explosive mixtures in air
Composition / Information on Ingredients
Chemical: Molybdenum Hydroxide
Purity: More than 98%
Impurities: May contain trace amounts of oxides, chlorides, or hydrous phases
Hazardous Components: None above regulatory thresholds except molybdenum itself
First Aid Measures
Inhalation: Remove victim to fresh air, keep at rest, seek medical attention if symptoms develop
Skin Contact: Wash with plenty of soap and water for at least 15 minutes, remove contaminated clothing
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses, keep rinsing, get medical advice
Ingestion: Rinse mouth thoroughly with water, seek immediate medical care, do not induce vomiting unless directed
Symptoms: Burning sensation, redness, dryness, coughing, headache, nausea
Note to Physician: Treat symptomatically, monitor for pulmonary complications
Fire-Fighting Measures
Suitable Extinguishing Media: Dry chemical, carbon dioxide, water spray, foam
Hazards from Combustion: Molybdenum oxides may form on burning
Protective Equipment: Firefighters wear full protective clothing and self-contained breathing apparatus
Fire Fighting Instructions: Avoid contact with skin and eyes, keep away from dust generation during fire suppression
Special Hazards: Fine powders may present dust explosion risk — ventilate confined spaces
Accidental Release Measures
Spill Response: Evacuate area, ventilate, prevent dust formation, use tools to pick up material, avoid dry sweeping
Personal Precautions: Wear appropriate protective clothing, gloves, goggles, use respiratory protection for dust
Environmental Precautions: Prevent spillage from reaching drains, surface water, or soil
Clean-up Procedures: Collect in suitable closed containers, dispose of safely, wash area with water after collection
Disposal Considerations: Follow local regulations for hazardous waste disposal
Handling and Storage
Handling: Handle in well-ventilated places, minimize dust generation and accumulation, avoid inhalation or ingestion, use non-sparking tools
Hygiene Measures: Wash thoroughly before eating, drinking or smoking after handling material
Storage: Store tightly sealed containers in cool, dry, well-ventilated areas, away from sources of ignition, incompatible substances, or direct sunlight
Incompatible Materials: Strong acids, strong bases, oxidizing agents
Storage Temperature: Store at recommended ambient temperature, protected from moisture
Exposure Controls and Personal Protection
Exposure Limit: Occupational molybdenum exposure (OSHA PEL): 5 mg/m3 TWA, ACGIH TLV: 0.5 mg/m3 respirable as Mo
Engineering Controls: Local exhaust ventilation, process enclosures, eyewash stations, and safety showers
Personal Protection: Wear impervious gloves (nitrile recommended), chemical splash goggles, lab coat, and use respiratory protection when ventilation is inadequate or for dust levels above regulatory limits
Hygiene: Remove contaminated clothing, avoid eating, drinking, or smoking while using this material, wash hands after work
Physical and Chemical Properties
Appearance: Light green to pale yellow solid powder
Odor: Odorless
pH: Slightly alkaline in suspension
Melting Point: Decomposes upon heating
Boiling Point: Not applicable
Flash Point: Not flammable
Solubility: Insoluble in water, limited solubility in acids
Density: About 4.2 g/cm3
Vapor Pressure: Negligible at room temperature
Partition Coefficient: Not applicable
Stability and Reactivity
Chemical Stability: Stable under recommended storage and handling conditions
Possibility of Hazardous Reactions: Contact with strong acids releases molybdenum ions, may react with oxidizers
Conditions to Avoid: Excessive heat, ignition sources, moisture, incompatible materials
Hazardous Decomposition Products: Molybdenum oxides, hydrogen when reacting with acids
Polymerization: Does not occur
Toxicological Information
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: May cause irritation of mucous membranes, eyes, and skin, coughing, difficulty breathing if inhaled here over extended time
Chronic Effects: Prolonged exposure has been associated with decreased lung function, gastrointestinal disturbance, joint pain
Symptoms: Reddening, burning, nausea, headache, chest discomfort
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, ACGIH, OSHA
Repeated Exposure: Potential for chronic lung, liver, and kidney effects, mostly seen in industrial settings
Ecological Information
Aquatic Toxicity: Harmful to aquatic organisms, possible long-term adverse effects for aquatic environments
Persistence and Degradability: Low biodegradability, persistent in nature
Bioaccumulation Potential: Possible bioaccumulation in aquatic organisms over continuous exposure
Mobility in Soil: Low mobility—tends to adsorb onto soil particles
Other Adverse Effects: Large spills threaten aquatic life, strict measures reduce environmental risks
Disposal Considerations
Disposal Methods: Dispose of as hazardous material at properly permitted facility
Waste Generation: Avoid unnecessary waste, recycle if possible, minimize volume
Contaminated Packaging: Empty containers require professional treatment and disposal, do not reuse containers for unrelated purposes
Regulations: Follow national, regional, and local disposal regulations for hazardous materials
Advice: Consult local waste authorities before final disposal
Transport Information
UN Number: Not regulated for ground, air or sea transport under normal circumstances
UN Shipping Name: Molybdenum Compounds, Not Otherwise Specified
Transport Hazard Class: Not classified as dangerous for transport
Packing Group: None assigned
Special Precautions: Use sealed packaging, secure load to prevent spilling during transport
Environmental Hazards: Avoid uncontrolled release during loading/unloading
Regulatory References: Refer to relevant transport standards according to region and mode of transit
Regulatory Information
Labelling: GHS, OSHA Hazard Communication Standard, EU CLP
Chemicals Inventory: Listed in TSCA, EINECS, DSL, ENCS, AICS, PICCS, IECSC
Restriction of Use: Professional use only, industrial and laboratory settings
SARA Title III: Not listed as an extremely hazardous substance, subject to thresholds for reporting
California Proposition 65: Not listed
Accredited Standard Compliance: Conforms to REACH, OSHA, and Canadian WHMIS standards
Other Information: Ensure compliance with all applicable workplace safety and environmental protection laws
