Material Safety Data Sheet: Ammonium Octamolybdate

Identification

Product Name: Ammonium Octamolybdate
Chemical Formula: (NH4)2Mo8O26
CAS Number: 12027-67-7
Synonyms: Tetrammonium Octamolybdate, Diammonium Octamolybdate
Recommended Use: Chemical intermediate, catalyst, corrosion inhibitor, pigment
Supplier Information: Company address, emergency contact number, customer service line

Hazard Identification

Classification: Acute toxicity (oral, inhalation), Eye irritation, Specific target organ toxicity
Signal Word: Warning
Hazard Statements: Harmful if swallowed, May cause respiratory irritation, Causes eye irritation
Pictograms: Exclamation mark
Precautionary Statements: Avoid breathing dust, Wash hands thoroughly after handling, Wear protective gloves and goggles

Composition / Information on Ingredients

Chemical Name: Ammonium Octamolybdate
Concentration: 95-100%
Additional Components: Trace impurities below reporting limits

First Aid Measures

Inhalation: Move person to fresh air, get medical attention if symptoms develop
Skin Contact: Remove contaminated clothing, rinse skin with plenty of water, seek medical advice if irritation persists
Eye Contact: Rinse eyes cautiously with water for several minutes, remove contact lenses if present, get medical help if discomfort continues
Ingestion: Rinse mouth, do not induce vomiting, call poison control or a physician immediately

Fire-Fighting Measures

Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide
Unsuitable Extinguishing Media: None known
Specific Hazards: Releases toxic fumes of ammonia, molybdenum oxides under fire conditions
Protective Equipment: Firefighters need self-contained breathing apparatus, full protective clothing
Firefighting Instructions: Evacuate area, use water spray to cool containers, avoid inhaling fumes

Accidental Release Measures

Personal Precautions: Wear personal protective equipment, avoid dust formation, stay upwind
Environmental Precautions: Prevent entry into drains, waterways, soil
Cleanup Methods: Collect material mechanically, place in appropriate waste container, ventilate area, wash residual with plenty of water

Handling and Storage

Handling: Handle in well-ventilated area, avoid contact with skin, eyes, and clothing, prevent dust generation
Storage: Store in a tightly closed container, keep away from heat and incompatible materials, store in cool, dry place, label clearly and segregate from acids and oxidizers

Exposure Controls and Personal Protection

Exposure Limits: Occupational exposure limit may exist for molybdenum compounds, typically 5 mg/m³ as Mo (OSHA, ACGIH)
Engineering Controls: Use local exhaust ventilation to reduce airborne levels, safety shower and eyewash stations recommended
Personal Protection: Protective gloves, chemical-resistant apron, safety goggles, dust mask or respirator if exposure exceeds limits

Physical and Chemical Properties

Appearance: White to off-white solid, crystalline powder
Odor: Odorless
pH: About 3.0 – 5.0 (1% solution)
Melting Point: Decomposes before melting
Boiling Point: Not applicable
Solubility: Soluble in water
Density: 2.62 g/cm³
Vapor Pressure: Not available
Partition Coefficient: Not available
Viscosity: Not applicable
Flash Point: Not flammable

Stability and Reactivity

Chemical Stability: Stable under recommended conditions
Possibility of Hazardous Reactions: No dangerous reactions known under standard conditions
Conditions to Avoid: Exposure to heat, moisture, strong acids, strong oxidizers
Incompatible Materials: Acids, strong oxidizing agents
Hazardous Decomposition Products: Ammonia, nitrogen oxides, molybdenum oxides upon thermal decomposition

Toxicological Information

Acute Toxicity: May cause irritation and gastrointestinal disturbance if ingested, inhalation may cause respiratory tract irritation
Chronic Effects: Prolonged overexposure could result in symptoms of molybdenum toxicity (joint pain, fatigue, liver and kidney effects)
Routes of Exposure: Inhalation, ingestion, skin or eye contact
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, or OSHA
Sensitization: Not expected to be a skin or respiratory sensitizer

Ecological Information

Ecotoxicity: Toxic to aquatic organisms at high concentrations, potential for long-term effects in aquatic systems
Persistence and Degradability: Inorganic compound, not expected to biodegrade
Bioaccumulation Potential: Low potential for bioaccumulation
Mobility in Soil: Moderately mobile in soil due to water solubility
Other Adverse Effects: Avoid release to environment due to aquatic toxicity

Disposal Considerations

Waste Disposal Methods: Collect and manage waste according to local, regional, and national regulations, use licensed chemical waste disposal provider
Container Disposal: Empty container must be triple rinsed, rendered unusable, disposed according to official guidelines
Special Precautions: Prevent entry into sewers, watercourses, soil

Transport Information

UN Number: Not classified as hazardous for transport under UN, IMDG, IATA
Proper Shipping Name: Not regulated
Hazard Class: Not applicable
Packing Group: Not applicable
Special Transport Precautions: Keep container tightly sealed, protect from moisture, secure load to prevent spillage

Regulatory Information

OSHA Hazard Communication: Covered under OSHA regulations
TSCA: Listed on the US TSCA Inventory
REACH Status: Registered or exempted under EU REACH regulations
SARA Title III: Not a Section 302, 304, 313 hazardous substance
Other National Inventories: Listed in major chemical inventories such as Canada DSL, Australia AICS, China IECSC, Japan ENCS
Labeling: Complies with GHS classification and labeling requirements