MSDS for Hexaammonium Molybdate
Identification
Product Name: Hexaammonium Molybdate
Synonyms: Ammonium Molybdate, Ammonium Molybdate Hexahydrate
Chemical Formula: (NH4)6Mo7O24·4H2O
CAS Number: 12054-85-2
Manufacturer: Manufacturer information found on the supplier label
Contact Information: Emergency phone number and address provided by supplier
Recommended Use: Common in chemical analysis, laboratory reagent, catalyst, fertilizer component
Restrictions: Not intended for drug, food, or household use
Hazard Identification
Classification: Eye irritation, category 2; skin irritation, category 2; specific target organ toxicity (single exposure), category 3
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation; may cause respiratory irritation; harmful if swallowed or inhaled
Precautionary Statements: Wash hands after handling, do not eat, drink, or smoke while using, use only outdoors or in well-ventilated area, avoid breathing dust
Pictograms: Exclamation mark symbol
Potential Health Effects: Irritation to eyes, skin, and respiratory tract; gastrointestinal distress if ingested; prolonged exposure may affect kidneys and liver
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Other Hazards: Not known to be explosive or flammable under normal conditions
Composition / Information on Ingredients
Chemical Name: Hexaammonium Molybdate
Common Name: Ammonium Molybdate
Content: 97–100%
CAS Number: 12054-85-2
Impurities: Traces of ammonia, water of crystallization
Molecular Weight: 1235.86 g/mol
Additives: No known additives
Mixture: Substance is not a mixture
First Aid Measures
Inhalation: Move to fresh air, monitor for breathing difficulties, seek medical attention if symptoms persist
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water, get medical help if irritation or rash develops
Eye Contact: Rinse carefully with water for at least 15 minutes, seek immediate medical attention for persistent pain or vision changes
Ingestion: Rinse mouth, do not induce vomiting, seek medical attention right away
Symptoms: Cough, sore throat, eye redness, skin redness, abdominal cramps, nausea
Note to Physician: Treat symptomatically; monitor kidney and liver function if significant ingestion has occurred
Fire-Fighting Measures
Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide
Unsuitable Media: Do not use strong water jets due to the risk of spattering
Combustion Products: Ammonia, nitrogen oxides, molybdenum oxides may form
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective clothing
Fire Hazards: Hexaammonium molybdate does not burn, but containers may burst under intense heat
Special Procedures: Use water spray to cool containers, contain water runoff to prevent environmental damage
Accidental Release Measures
Personal Precautions: Wear suitable protective clothing, gloves, goggles, and mask to avoid dust inhalation and contact with skin or eyes
Environmental Precautions: Prevent entry into sewers and waterways, contain spill with non-combustible absorbent
Clean-Up Procedures: Sweep up and shovel spilled material into a dry, leak-proof container, avoid creating dust, ventilate area well
Waste Disposal: Dispose in compliance with local, regional, and national regulations
Notification: Inform authorities if large spill enters public waters or sewage system
Handling and Storage
Handling: Avoid dust generation, use only in a fume hood or well-ventilated area, wear protective clothing and remove contaminated clothing promptly
Hygiene: Wash hands thoroughly after handling; do not eat, drink, or smoke during use
Storage: Store in cool, dry, well-ventilated area away from incompatible substances such as strong acids and oxidizers
Packaging: Use tightly sealed, corrosion-resistant containers to prevent moisture absorption; keep labeled
Storage Conditions: Keep out of direct sunlight, away from sources of ignition and foodstuffs
Incompatibilities: Separate from oxidizers, acids, and ammonium nitrate to avoid hazardous reactions
Exposure Controls and Personal Protection
Occupational Exposure Limits: Ammonium compounds: ACGIH (TLV): 10 mg/m3 (as inhalable fraction); Molybdenum compounds (soluble): OSHA (PEL): 5 mg/m3 (as Mo, respirable)
Engineering Controls: Local exhaust ventilation, safety shower, eyewash stations
Personal Protective Equipment: Safety goggles, chemical-resistant gloves (nitrile, neoprene), lab coat, dust mask or NIOSH-approved respirator if dust is present
Hand Protection: Chemical-resistant gloves, ensure no skin exposure
Eye/Face Protection: Safety goggles with side shields
Skin Protection: Long-sleeve clothing, closed shoes
Respiratory Protection: Approved respirator in low-ventilation or dust-producing tasks
Environmental Exposure Controls: Prevent release to environment, use enclosures or containment as needed
Physical and Chemical Properties
Appearance: White crystalline or powder solid
Odor: Ammonia-like odor when wet
Odor Threshold: Not determined
pH: 5 to 7 (5% solution in water)
Melting Point: Loses water at 100°C, decomposes on further heating
Boiling Point: Not applicable, decomposes on heating
Flash Point: Not applicable
Flammability: Not flammable
Vapor Pressure: Not available
Solubility: Soluble in water
Partition Coefficient: Not available
Density: 2.3–2.5 g/cm3
Decomposition Temperature: Decomposes generating ammonia and nitrogen oxides
Viscosity: Not applicable
Explosive Properties: Not explosive
Oxidizing Properties: Not oxidizing
Stability and Reactivity
Chemical Stability: Stable under recommended storage conditions
Thermal Decomposition: Releases ammonia, nitrogen oxides above 100°C
Reactive Conditions: Avoid extreme heat, sparks, flame, and incompatible materials
Incompatible Materials: Strong acids, oxidizers, alkali metals, ammonium nitrate
Hazardous Decomposition Products: Ammonia, nitrogen oxides, molybdenum oxides
Polymerization: Does not polymerize
Toxicological Information
Routes of Exposure: Inhalation, skin, eyes, ingestion
Acute Toxicity: LD50 (oral, rat): 423 mg/kg (estimated, as ammonium molybdate)
Skin Irritation: May cause redness, itching
Eye Effects: May cause eye irritation, watering, redness
Respiratory Effects: Dust can cause coughing, shortness of breath, respiratory tract irritation
Chronic Effects: Repeated or prolonged exposure can affect liver and kidneys; not classified as carcinogenic
Sensitization: No known sensitizing effect
Mutagenicity: Not classified as mutagenic
Reproductive Toxicity: No significant data available, standard precautions advised
Other Information: Health impacts largely depend on dose and route of exposure; better ventilation and personal protection greatly reduce risk
Ecological Information
Toxicity to Aquatic Life: Toxic to aquatic organisms in high concentrations; may cause long-term adverse effects in the aquatic environment
Persistence and Degradability: Inorganic, not expected to degrade significantly in environment
Bioaccumulative Potential: Not expected to bioaccumulate significantly
Mobility in Soil: High mobility due to water solubility
Other Adverse Effects: Large releases may upset microbial balance in water; always prevent from entering drains or waterways
Additional Notes: Any spill should be attended to immediately, with care to avoid soil and water contamination
Disposal Considerations
Waste Generation: Collect all solid and liquid waste in appropriately labeled, sealed containers
Disposal Methods: Dispose of hazardous chemical waste via licensed chemical disposal contractor
Container Handling: Rinse empty container before disposal; handle rinsate as hazardous waste
Legal Requirements: Comply with local, regional, and national regulations
Special Precautions: Do not allow into drains, waterways, or soil
Recycling: Consult with waste contractor about recycling options when available
Transport Information
UN Number: Not classified as dangerous for transport regulations
Transport Hazard Class: No specific hazard class required
Packing Group: No assigned packing group
Proper Shipping Name: Hexaammonium Molybdate
Special Precautions: Ensure packaging prevents moisture uptake and release of dust
Environmental Hazards: Not a marine pollutant, but avoid large releases during transit
Additional Requirements: Clearly label containers, separate from incompatible goods
Regulatory Information
OSHA Status: Regulated as a hazardous substance; follow all workplace safety standards
TSCA Listing: Substance is listed on the TSCA Inventory
REACH Status: Meets registration requirements as applicable
DSL/NDSL: Listed in Canadian Domestic Substances List
WHMIS Classification: Controlled under WHMIS
US EPA: Not specifically listed as hazardous waste, but disposal must follow regulations
Labeling: Must display hazard pictogram, signal word, hazard statements
Community Right-to-Know: Access to SDS required for employees; emergency plans needed in facilities using large quantities
Other Regulations: Subject to state, federal, and international chemical control laws; safety training and PPE enforcement are essential for compliance
