Material Safety Data Sheet (MSDS) for Ammonium Molybdate

Identification

Product Name: Ammonium Molybdate
Chemical Formula: (NH4)6Mo7O24•4H2O
CAS Number: 12054-85-2
Recommended Use: Catalysts, analytical reagents, dye fixing, metal treatment, ceramics, water treatment
Supplier Details: [Supplier name], [Address], [Contact number]

Hazard Identification

GHS Classification: Acute Toxicity (Oral) Category 4, Eye Irritation Category 2A, Skin Sensitization Category 1
Signal Word: Warning
Hazard Statements: May cause skin and eye irritation; Harmful if swallowed
Pictograms: Exclamation mark
Precautionary Statements: Wash hands thoroughly after handling; Wear protective gloves, clothing, and eye/face protection; If in eyes, rinse cautiously with water for several minutes

Composition / Information on Ingredients

Chemical Name: Ammonium Molybdate Tetrahydrate
Molecular Weight: 1235.86 g/mol
CAS Registry Number: 12054-85-2
EC Number: 234-722-4
Concentration: 98-100% (by weight)
Impurities: May contain trace metal oxides, water of hydration

First Aid Measures

Inhalation: Move to fresh air; Keep patient warm and at rest; Seek medical attention if symptoms occur
Skin Contact: Remove contaminated clothing; Rinse skin with plenty of water; Get medical help if irritation develops
Eye Contact: Flush immediately with plenty of water for 15 minutes, lifting upper and lower eyelids; Consult a doctor
Ingestion: Rinse mouth; Give water if conscious; Do not induce vomiting; Seek medical attention promptly

Fire-Fighting Measures

Suitable Extinguishing Media: Use dry chemical, carbon dioxide, foam, or water spray
Unsuitable Media: None identified
Specific Hazards: Decomposes at high temperatures forming toxic molybdenum oxides and ammonia gases; Dust can form explosive mixtures with air
Protective Equipment: Firefighters wear self-contained breathing apparatus and protective suit
Firefighting Instructions: Cool containers with water; Avoid breathing smoke, gases, or vapor

Accidental Release Measures

Personal Precautions: Evacuate area and restrict access; Avoid dust formation; Use personal protective equipment
Environmental Precautions: Prevent spills from entering drains, waterways, or soil
Methods for Cleanup: Collect spilled material using non-sparking tools; Place in labeled container for disposal; Ventilate contaminated area after cleanup

Handling and Storage

Safe Handling: Handle in well-ventilated areas; Minimize dust generation; Avoid contact with skin and eyes
Storage: Store in cool, dry, well-ventilated place; Keep container tightly closed; Separate from acids, strong oxidizers, and reducing agents
Incompatible Materials: Strong acids, alkalis, and oxidizers

Exposure Controls and Personal Protection

Occupational Exposure Limits: Molybdenum (as Mo, soluble compounds) OSHA PEL TWA: 5 mg/m³; ACGIH TLV TWA: 0.5 mg/m³
Engineering Controls: Use local exhaust or general ventilation; Safety showers and eyewash stations readily accessible
Personal Protective Equipment: NIOSH-approved respirator for dust; Chemical-resistant gloves; Lab coat or coveralls; Safety goggles; Do not eat, drink, or smoke while handling

Physical and Chemical Properties

Appearance: White crystalline powder
Odor: Odorless
Melting Point: Decomposes before melting (approx. 190°C)
Solubility: Soluble in water
pH: Slightly acidic to neutral when dissolved in water
Boiling Point: Not applicable
Density: 2.5 g/cm³
Vapor Pressure: Not volatile
Flash Point: Not flammable
Partition Coefficient: Not available

Stability and Reactivity

Chemical Stability: Stable under recommended storage conditions
Reactivity: Incompatible with strong acids and reducing agents
Hazardous Decomposition Products: Emits toxic fumes of molybdenum oxides and ammonia on decomposition
Conditions to Avoid: Heat, moisture, open flame, incompatible materials

Toxicological Information

Acute Toxicity: Oral LD50 (rat) 333 mg/kg; can cause gastrointestinal distress
Irritation: Contact with skin or eyes may cause irritation or redness
Sensitization: Prolonged exposure may trigger allergic reactions in sensitive individuals
Chronic Effects: Repeated overexposure linked with anemia, liver or kidney effects
Carcinogenicity: Not classified as carcinogen by IARC, NTP, or OSHA
Other Effects: May cause molybdenosis with excessive exposure, characterized by gout-like symptoms and metabolic disturbances

Ecological Information

Ecotoxicity: Toxic to aquatic life at high concentrations; risk of bioaccumulation in aquatic organisms
Persistence and Degradability: Inorganic salt, not readily degradable
Bioaccumulation Potential: Potential for accumulation in soil and aquatic environments
Mobility in Soil: Moderately mobile; water solubility may facilitate leaching
Additional Information: Prevent large releases to surface water or groundwater; chemical persists in environment

Disposal Considerations

Waste Disposal Methods: Dispose of according to local, regional, and national regulations; unused product can be sent to hazardous waste landfill or incineration facility
Container Disposal: Containers should be completely emptied and rinsed before recycling or disposal
Special Precautions: Do not discharge to drains or watercourses; inform local authorities if contamination of environment or waterways occurs

Transport Information

UN Number: Not classified as dangerous goods by transport regulations
Proper Shipping Name: Ammonium Molybdate
Hazard Class: Not regulated
Packing Group: Not applicable
Transport Precautions: Keep away from strong acids, heat, and incompatible materials; transport in tightly sealed containers to prevent spillage

Regulatory Information

TSCA: Listed in US Toxic Substances Control Act inventory
REACH: Registered under European REACH regulation
SARA Title III: Not subject to the reporting requirements of Section 313
WHMIS Classification (Canada): D2B (Toxic Material Causing Other Toxic Effects)
Other Regulations: Compliant with OSHA Hazard Communication Standard; handle according to established good laboratory practices; additional local, state, and federal regulations may apply