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Product Name: Phosphomolybdic Acid Hydrate
Chemical Formula: H3PMo12O40·xH2O
Synonyms: Phosphomolybdic Acid, Molybdophosphoric Acid Hydrate
CAS Number: 51429-74-4
Recommended Use: Laboratory reagent, catalyst, staining agent in microscopy, analytical chemistry
Supplier Details: Company details, emergency contact, address of vendor
Classification: Acute toxicity (oral), skin and eye irritation, corrosive to metals
Label Elements: Corrosive pictogram, signal word: Danger
Hazard Statements: Causes severe skin burns and eye damage; harmful if swallowed; corrosive to respiratory tract
Precautionary Statements: Avoid breathing dust or fumes, use suitable protective gear, wash hands after handling
Other Hazards: May cause irritation to mucous membranes, is hygroscopic
Chemical Name: Phosphomolybdic Acid Hydrate
Constituent: Phosphomolybdic acid—concentration 98–100% (hydrated form contains water of crystallization)
CAS Number: 51429-74-4
Impurities: Not expected to contain significant impurities; minor variations due to water content
Eye Contact: Flush eyes with plenty of water for at least 15 minutes, lifting eyelids; seek immediate medical attention
Skin Contact: Remove contaminated clothing, rinse skin with water and soap, call physician if irritation persists
Inhalation: Move to fresh air, monitor breathing; administer artificial respiration if breathing stops, get medical help
Ingestion: Rinse mouth, do not induce vomiting, drink water if conscious; seek immediate medical attention
Most Important Symptoms: Burning sensation, coughing, irritation, severe pain, tissue damage to exposed areas
Suitable Extinguishing Media: Water spray, foam, dry chemical, carbon dioxide
Unsuitable Extinguishing Media: None identified for this substance
Hazardous Combustion Products: May emit toxic fumes of phosphorus oxides, molybdenum oxides
Firefighting Precautions: Wear self-contained breathing apparatus, full protective gear
Special Hazards: Thermal decomposition produces corrosive and toxic gases, non-flammable solid but reacts with metals producing hydrogen gas
Personal Precautions: Wear eye protection, gloves, chemical-resistant clothing; avoid dust formation
Environmental Precautions: Prevent further spillage or leakage into drains, sewers, or water bodies
Cleaning Methods: Use inert absorbent material, sweep or scoop into marked containers for disposal; ventilate spill area thoroughly; clean residue with water
Disposal: Dispose of material under local, national, or regional regulations; never flush into surface water or drains
Safe Handling: Handle in well-ventilated areas, avoid contact with skin, eyes, and clothing, use tools or containers to minimize direct contact
Hygiene Practices: Wash hands and exposed areas after working with the material, avoid eating, drinking, or smoking in work areas
Storage Requirements: Store in tightly sealed containers, in a cool, dry, well-ventilated space, away from incompatible substances such as organic materials or metals
Storage Temperatures: Room temperature, avoid humidity and direct sunlight
Segregation: Do not store near food, beverages, oxidizers, or bases
Exposure Limits: Not specifically established for this compound; handle as a strong acid with oxidizing properties
Engineering Controls: Use local exhaust ventilation, fume hoods where possible
Personal Protective Equipment: Chemical-resistant gloves, protective goggles, lab coat or apron, face shield if splashing is possible
Respiratory Protection: Use approved mask or respirator if dust or fume exposure risk exists
Environmental Controls: Prevent release into the environment; use containment during transfer and handling
Appearance: Yellow-green crystalline solid
Odor: Odorless or faintly acidic scent
pH: Acidic (strong acid, pH <1 in solution)
Melting Point: Decomposes at approximately 175°C
Solubility: Soluble in water and ethanol
Density: Approximately 2.85 g/cm3 (anhydrous)
Vapor Pressure: Not applicable (non-volatile)
Boiling Point: Not applicable (decomposes before boiling)
Partition Coefficient: Not determined
Other Characteristics: Absorbs moisture from air, corrosive
Chemical Stability: Stable under recommended storage conditions, reacts with water if left exposed
Conditions to Avoid: Heat, moisture, exposure to air
Incompatible Materials: Strong bases, reducing agents, organic substances, metals
Hazardous Decomposition Products: Phosphorus oxides, molybdenum oxides, toxic fumes upon decomposition
Hazardous Reactions: Can react with metals to release hydrogen, contact with organics may cause fire or explosion hazard
Acute Toxicity: Harmful if ingested in moderate amounts; corrosive; orally toxic to humans and animals at higher exposure
Skin & Eye Contact: Severe irritation or burns; risk of permanent damage from contact
Inhalation: Irritation to mucous membranes, coughing, breathing difficulty if dust or aerosols inhaled
Chronic Effects: Prolonged or repeated exposure may cause dermatitis, respiratory issues, and sensitization
Carcinogenicity: Not classified by IARC, NTP, or OSHA
Other Effects: May aggravate pre-existing skin or respiratory conditions
Ecotoxicity: Harmful to aquatic organisms, may cause long-term adverse impact in aquatic environments
Mobility in Soil: Limited, but may persist due to low degradability
Persistence and Degradability: Inorganic compound, does not degrade readily in the environment
Bioaccumulation Potential: Limited available data, not expected to bioaccumulate
Other Ecological Information: Minimize release; larger spills threaten local aquatic life
Waste Treatment: Handle as hazardous waste, require designated chemical disposal contractor
Disposal Methods: Incinerate in a licensed facility, deliver to a certified hazardous waste disposal site
Precautions: Avoid disposal in sewer or regular municipal waste; observe all rules concerning hazardous chemicals
Contaminated Packaging: Containers must be triple rinsed then disposed of properly or reconditioned if permissible
UN Number: 3264
Proper Shipping Name: Corrosive liquid, acidic, inorganic, n.o.s. (contains phosphomolybdic acid)
Hazard Class: 8 (corrosive substances)
Packing Group: II
Transport Labels: Corrosive label required
Marine Pollutant: Not classified as marine pollutant under GHS, though care recommended
Special Precautions: Ensure containers are upright and leak-proof; emergency response information available during transport
US Regulations: Not listed by TSCA, but subject to OSHA regulations for hazardous substances
EU Regulations: Classified as a dangerous substance per CLP/GHS; subject to REACH registration and reporting
Other International Regulations: Must comply with local chemical safety, worker protection, and environmental regulations covering corrosives and inorganic acids
Labeling: GHS-compliant labeling with hazard pictograms, signal word, and safe-use instructions
Restrictions: Use and disposal generally restricted to qualified personnel in controlled settings
