Material Safety Data Sheet: Molybdenum Citrate

Identification

Product Name: Molybdenum Citrate
Chemical Formula: C6H5MoO7
Synonyms: Citric acid molybdenum salt, Molybdenum(III) citrate
Manufacturer: Information available upon request
Recommended Use: Laboratory reagent, catalyst, trace nutrient, research purposes
Emergency Phone Number: Local poison control center or hospital emergency
Contact Address: Provided by distributor or supplier

Hazard Identification

GHS Classification: Acute Toxicity (Oral) Category 5, Eye Irritation Category 2B, Skin Sensitization Category 1
Pictogram: Exclamation mark
Signal Word: Warning
Hazard Statements: May cause skin and eye irritation. Harmful if swallowed. May cause respiratory discomfort on prolonged exposure.
Precautionary Statements: Avoid breathing dust. Wash hands after handling. Use protective gloves and eye protection. Avoid release to environment.

Composition / Information on Ingredients

Chemical Name: Molybdenum Citrate
CAS Number: 142650-97-7
EC Number: Not listed
Concentration: 100% (pure substance in research reagent form)
Impurities and Additives: Not expected under normal handling and storage conditions

First Aid Measures

Inhalation: Remove person to fresh air. Seek medical attention if symptoms persist. Rinse mouth and nose gently with water.
Skin Contact: Take off contaminated clothing. Wash with soap and plenty of water. If irritation develops, consult physician.
Eye Contact: Rinse cautiously with water for at least 15 minutes. Remove contact lenses if present and safe to do so. Continue rinsing. Seek medical advice if irritation occurs.
Ingestion: Rinse mouth with water. Do not induce vomiting. Seek medical help if feeling unwell or experiencing discomfort.
Most Important Symptoms: Irritation, redness, coughing, shortness of breath, or allergic skin reactions.

Fire-Fighting Measures

Suitable Extinguishing Media: Water spray, dry chemical powder, carbon dioxide, foam
Unsuitable Extinguishing Media: Direct water jet for large fires
Special Protective Equipment: Wear self-contained breathing apparatus and full protective gear
Fire and Explosion Hazards: Product does not burn, but may decompose upon strong heating forming oxides of molybdenum and irritating fumes. Containers may explode if heated.
Advice for Firefighters: Move containers away from fire if it can be done safely. Cool containers with water spray to prevent pressure build-up.

Accidental Release Measures

Personal Precautions: Evacuate personnel from spill area. Wear protective gloves, masks, and goggles. Avoid breathing dust.
Environmental Precautions: Prevent further leakage or spillage. Keep material from entering drains, surface water, or soil.
Methods for Clean-up: Sweep or scoop up spilled material. Place in approved waste container. Clean spill site with water and detergent, ventilate area.
Reference to Other Sections: Disposal considerations and personal protection described elsewhere in this sheet.

Handling and Storage

Handling: Use with adequate ventilation. Wear protective equipment. Avoid dust formation and prevent contact with skin, eyes, and clothing. Wash thoroughly after handling.
Storage: Store in tightly sealed containers in a cool and dry location. Keep away from incompatible materials such as oxidizers and acids. Ensure all containers are correctly labeled. Avoid exposure to moisture and direct sunlight.
Specific End Use(s): As stated in the identification section.

Exposure Controls and Personal Protection

Engineering Controls: Work in fume hoods or with local exhaust. Install eyewash stations and safety showers where handling occurs.
Respiratory Protection: Use NIOSH-approved respirators if excessive dust is generated.
Skin Protection: Wear chemical-resistant gloves, lab coat, and long sleeves.
Eye Protection: Use safety goggles or face shield.
Hygiene Measures: Remove contaminated clothing. Do not eat or drink during use. Wash hands before breaks and after work.
Occupational Exposure Limits: No OSHA or ACGIH exposure limits specific for this compound, but limits for soluble molybdenum are generally less than 5 mg/m³ (TWA).

Physical and Chemical Properties

Appearance: White to pale yellow powder
Odor: Odorless
Odor Threshold: Not applicable
pH: 4-6 (1% solution in water)
Melting Point/Freezing Point: Not available
Boiling Point: Decomposes
Flash Point: Not flammable
Evaporation Rate: Not applicable
Flammability: Not flammable
Vapor Pressure: Not available
Vapor Density: Not available
Solubility: Soluble in water
Partition Coefficient (n-octanol/water): Not established
Decomposition Temperature: Above 200°C
Viscosity: Not applicable
Molecular Weight: 309.05 g/mol

Stability and Reactivity

Reactivity: Stable under normal conditions
Chemical Stability: Stable in dry, well-sealed containers
Possibility of Hazardous Reactions: May react with strong oxidizing agents or strong acids
Incompatible Materials: Strong oxidizers, strong acids, reducing agents
Hazardous Decomposition Products: Oxides of molybdenum and carbon when heated to decomposition
Conditions to Avoid: Exposure to excessive heat, moisture, and sources of ignition

Toxicological Information

Acute Toxicity: Data for molybdenum compounds point to low to moderate toxicity, with LD50 (oral, rat) > 2000 mg/kg
Skin Corrosion/Irritation: May cause mild irritation on contact
Serious Eye Damage/Irritation: May cause slight to moderate irritation
Respiratory Sensitization: Dust can trigger mild respiratory irritation with repeated exposure
Skin Sensitization: Reports have indicated rare allergic responses
Carcinogenicity: Not classified as carcinogenic by IARC, ACGIH, NTP, or OSHA
Reproductive Toxicity: No evidence of adverse reproductive effects in relevant animal studies
STOT – Single/Repeated Exposure: Repeated high dose exposure may affect liver and gastrointestinal system
Aspiration Hazard: Not classified as posing aspiration risk

Ecological Information

Ecotoxicity: Fish and aquatic organisms may show sensitivity to elevated molybdenum concentrations; LC50 (fish) usually greater than 100 mg/L
Mobility in Soil: Compound remains mobile in moist soils
Persistence and Degradability: Not readily biodegradable, but molybdenum forms persistent inorganic complexes
Bioaccumulation Potential: Low likelihood of significant bioaccumulation due to poor lipid solubility of the compound
Other Adverse Effects: Elevated molybdenum levels can cause nutritional imbalance in grazing animals and inhibit plant growth if allowed to accumulate.

Disposal Considerations

Disposal Methods: Collect waste in properly labeled containers for disposal through a licensed chemical waste contractor. Do not discharge to sewer systems or natural waterways.
Contaminated Packaging: Empty containers must be handled with care. Triple rinse and dispose of per local and national regulations.
Additional Notes: Follow all local, regional, national, and international regulations when disposing of material and packaging.

Transport Information

UN Number: Not regulated for transport
Proper Shipping Name: Molybdenum citrate
Transport Hazard Class: Not hazardous for ground, air, or sea transport
Packing Group: Not classified
Special Precautions: Avoid generating dust during transport and loading
Environmental Hazards: Not regulated as a marine pollutant

Regulatory Information

Safety, Health, Environmental Regulations: United States TSCA Inventory – listed; SARA Title III – not subject to Section 302 or 313 reporting as a toxic chemical. No requirements under California Prop 65.
EU REACH Status: Not registered
Canadian DSL/NDSL: Not listed
Japanese Chemical Regulation: Not specifically listed
Other Relevant International Laws: Users must adhere to all federal, state, and local environmental regulations. Additional workplace and safety standards may apply under OSHA or equivalent agencies.
Chemical Inventory Listings: Product must comply with labeling, workplace hazard communication, and restricted substance regulations as enforced in the respective country or region.