MSDS – Ammonium Tetramolybdate
Identification
Product Name: Ammonium Tetramolybdate
Chemical Formula: (NH4)6Mo7O24·4H2O
Synonyms: Ammonium heptamolybdate, Molybdic acid ammonium salt
CAS Number: 12054-85-2
Recommended Use: Laboratory chemical, catalyst, corrosion inhibitor
Supplier and Contact: Manufacturer or distributor details, local contact in emergencies
Hazard Identification
Classification: Acute Toxicity (Oral, Category 4), Eye Irritation (Category 2A), Skin Irritation (Category 2)
GHS Symbols: Exclamation Mark
Hazard Statements: Harmful if swallowed. Causes skin and serious eye irritation.
Health Hazards: May cause irritation of respiratory tract, eyes, and skin; toxic in large quantities
Environmental Hazards: Harmful to aquatic organisms with lasting effects; avoid release to environment
Precautionary Statements: Avoid contact with skin and eyes. Wash thoroughly after handling. Do not eat, drink, or smoke when using the product.
Composition / Information on Ingredients
Chemical Name: Ammonium Tetramolybdate
Concentration: 100%
CAS Number: 12054-85-2
Impurities: Trace levels of other molybdates, residual ammonia
First Aid Measures
Inhalation: Move person to fresh air. Seek medical attention if symptoms persist. Remove source of exposure.
Skin Contact: Remove contaminated clothing. Wash skin with copious water and soap. If skin irritation occurs, seek medical advice.
Eye Contact: Rinse eyes with water for at least 15 minutes while holding eyelids open. If irritation continues, consult a physician.
Ingestion: Rinse mouth with water. Do not induce vomiting. Call a physician or poison center right away if you feel unwell.
Most Important Symptoms: Eye and skin irritation, possible respiratory distress if inhaled in large quantities, nausea if swallowed
Advice for Medical Personnel: Treat symptomatically, monitor electrolyte balance in case of significant exposure
Fire-Fighting Measures
Suitable Extinguishing Media: Use dry chemical, foam, carbon dioxide, or water spray to extinguish flames.
Specific Hazards from Fire: Toxic fumes of ammonia and molybdenum oxides may form on decomposition. Containers can burst under intense heat.
Protective Equipment for Firefighters: Wear NIOSH-approved self-contained breathing apparatus and full protective gear.
Special Procedures: Move containers from fire area if safe. Dike fire control water to prevent environmental contamination.
Accidental Release Measures
Personal Precautions: Use personal protective equipment such as gloves, goggles, and suitable footwear. Avoid creating dust.
Environmental Precautions: Prevent spill from entering drains, water bodies, and soil. Inform authorities if large amounts enter the environment.
Methods for Containment: Sweep up and collect spilled material. Place in suitable, labeled containers for disposal.
Cleanup Procedures: Ventilate area, wash spill site with water after basic clean-up, and ensure all residues are collected.
Handling and Storage
Safe Handling: Handle in a well-ventilated area. Wear protective clothing. Avoid contact with eyes, skin, and clothing. Do not inhale dust.
Storage Requirements: Store in a cool, dry place away from incompatible substances such as acids and strong oxidizers, in tightly sealed containers.
Storage Conditions: Keep away from direct sunlight and moisture. Isolate from food and beverages. Store locked up and keep container labeled.
Incompatible Materials: Avoid storage near strong reducing agents, acids, or flammable substances.
Exposure Controls and Personal Protection
Exposure Limits: ACGIH TLV for soluble molybdenum compounds 0.5 mg/m3 (inhalable), OSHA PEL 5 mg/m3
Engineering Controls: Use local exhaust ventilation to minimize exposure. Maintain eyewash stations and safety showers nearby.
Personal Protective Equipment: Wear chemical-resistant gloves (nitrile or neoprene), safety goggles, laboratory coat. Use dust mask or respirator if ventilation inadequate.
Hygiene Measures: Wash hands after handling. Remove and wash contaminated clothing before reuse.
Physical and Chemical Properties
Appearance: White crystalline powder
Odor: Odorless
Odor Threshold: Not established
pH (1% Solution): 5.0 – 7.0
Melting Point: Decomposes
Boiling Point: Not applicable
Flash Point: Not flammable
Evaporation Rate: Not available
Flammability: Non-flammable
Vapor Pressure: Not applicable
Solubility in Water: Readily soluble
Partition Coefficient (n-octanol/water): Not determined
Density: Approx. 2.498 g/cm3
Decomposition Temperature: Above 130°C
Viscosity: Not applicable
Stability and Reactivity
Chemical Stability: Stable under recommended storage conditions. Sensitive to moisture and acids.
Possible Hazardous Reactions: Reacts with strong acids to form molybdic acid; releases ammonia gas.
Conditions to Avoid: Exposure to heat, moisture, acids, reducing agents
Incompatible Materials: Strong reducing agents, acids, flammable materials
Hazardous Decomposition Products: Ammonia, molybdenum oxides under fire or decomposition
Toxicological Information
Routes of Exposure: Inhalation, ingestion, skin, and eye contact
Acute Toxicity: Oral LD50 (rat): 1,913 mg/kg
Chronic Effects: Long-term exposure may result in kidney and liver effects, potential reproductive toxicity based on animal studies
Symptoms: Gastrointestinal upset (nausea, vomiting), skin redness, respiratory irritation
Carcinogenicity: Not classified as a human carcinogen by NTP, IARC, or OSHA
Other Data: Not mutagenic or teratogenic according to available studies
Ecological Information
Ecotoxicity: Harmful to aquatic organisms; molybdenum bioaccumulates in aquatic plants and can disrupt ecosystems
Environmental Fate: Soluble in water, can migrate to groundwater
Persistence and Degradability: Inorganic compound, does not degrade readily
Bioaccumulative Potential: Tends to accumulate in plants; moderate mobility in soil
Other Adverse Effects: Large releases may impact aquatic food chains and soil microorganisms
Disposal Considerations
Waste Treatment Methods: Dispose of in accordance with local, regional, and national laws. Consult a licensed waste disposal service.
Packaging Disposal: Decontaminate containers before disposal or recycle if possible.
Environmental Precautions: Do not allow material or contaminated water to enter drains or watercourses.
Special Disposal Considerations: Notify relevant authorities of any significant environmental discharge or contamination.
Transport Information
UN Number: Not regulated for transport
Transport Hazard Class: Not classified as hazardous for road, air, sea, or rail
Packing Group: Not applicable
Special Precautions: Secure containers to prevent leakage during transportation; avoid physical damage
Environmental Hazards: Not listed as marine pollutant but avoid accidental spillage
Transport Labels: No special labeling required, standard chemical labeling sufficient
Regulatory Information
TSCA Inventory: Listed
REACH Registration: Exempted due to tonnage or intermediate use
OSHA Standard: Covered under Hazard Communication Standard as hazardous
SARA Title III: Not classified as an Extremely Hazardous Substance
California Prop 65: Not listed as a carcinogen or reproductive toxicant
WHMIS Classification: Class D2B - Toxic Material
Labeling Requirements: Hazard pictograms, hazard and precautionary statements, supplier identification per chemical safety regulations
