Material Safety Data Sheet: Sodium Tungstate Dihydrate

Identification

Product Name: Sodium Tungstate Dihydrate
Chemical Formula: Na₂WO₄·2H₂O
CAS Number: 10213-10-2
Synonyms: Disodium tungstate dihydrate; Tungstic acid disodium salt, dihydrate
Recommended Use: Reagent, catalyst, laboratory chemical
Manufacturer Details: Sodium tungstate suppliers and chemical distributors
Contact Number for Emergency: Emergency information hotline numbers specific to chemical emergencies

Hazard Identification

Classification: Eye irritation (Category 2A), Acute toxicity (Category 4, Oral)
Label Elements: Hazard pictograms (exclamation mark), Signal word: Warning
Hazard Statements: Causes serious eye irritation, Harmful if swallowed
Precautionary Statements: Avoid contact with eyes and skin, Wash hands thoroughly after handling, Do not eat or drink during use
Potential Health Effects: Eye irritation, abdominal discomfort, headache, nausea
Environmental Impact: Considered harmful to aquatic environments with long-term effects

Composition / Information on Ingredients

Chemical Name: Sodium Tungstate Dihydrate
Common Name: Sodium tungstate
CAS Number: 10213-10-2
Concentration: More than 98% by weight
Impurities: Trace sodium salts, Water of crystallization

First Aid Measures

Inhalation: Move person to fresh air, seek medical attention if irritation persists
Skin Contact: Wash thoroughly with soap and water, remove contaminated clothing
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, get medical care for persistent irritation
Ingestion: Rinse mouth, avoid inducing vomiting, call a poison center or physician if unwell
Symptoms and Effects: Eye redness, abdominal pain, nausea, discomfort
Advice for Medical Staff: Treat symptomatically, ensure airway and breathing are maintained, supportive care as necessary

Fire-Fighting Measures

Suitable Extinguishing Media: Use water spray, foam, dry chemical or carbon dioxide
Specific Hazards from Fire: Releases toxic fumes including tungsten oxides and sodium oxides
Protective Equipment: Firefighters need to wear self-contained breathing apparatus and protective clothing
Special Precautions: Prevent contaminated firefighting water from entering the environment
Explosion Data: Not considered to be an explosion hazard under normal use

Accidental Release Measures

Personal Precautions: Evacuate area, ventilate space, avoid dust formation and inhalation, wear appropriate protective gear
Environmental Precautions: Prevent product from entering drains, soil, or water sources
Methods for Cleanup: Use inert absorbent material, sweep up without creating dust, transfer to labeled containers for disposal
Spill Handling: Clean contaminated floor using plenty of water, avoid raising dust, ensure good ventilation

Handling and Storage

Safe Handling: Use in well-ventilated areas, avoid breathing dust, wash hands after handling
Incompatible Materials: Acids, strong oxidizing agents
Storage Conditions: Store in a cool, dry, well-ventilated area; keep container tightly closed; store in original packing
Storage Class: Chemical storage category for inorganic compounds
Special Considerations: Prevent moisture contact, avoid storing near food or feed

Exposure Controls and Personal Protection

Occupational Exposure Limits: No OSHA PEL or ACGIH TLV set for sodium tungstate dihydrate; observe workplace limits for tungsten compounds
Engineering Controls: Local exhaust or general ventilation to control airborne concentrations
Personal Protective Equipment: Safety goggles, laboratory gloves, lab coat
Respiratory Protection: Wear dust mask for dry powders or insufficient ventilation
Hygiene Measures: Wash hands, arms, and face before eating or drinking; do not eat or smoke in work area

Physical and Chemical Properties

Appearance: White crystalline powder
Odor: Odorless
pH (1% solution): Around 8 to 11
Melting Point/Freezing Point: Decomposes before melting, above 698°C (anhydrous)
Boiling Point: Not volatile at room temperature
Solubility: Soluble in water
Density: 3.22 g/cm³ (anhydrous form)
Vapor Pressure: Negligible
Partition Coefficient: Not applicable
Evaporation Rate: Not applicable for solids
Other Data: Stable under ordinary storage conditions

Stability and Reactivity

Chemical Stability: Stable under specified storage and handling conditions
Reactivity: No dangerous reactions known under normal conditions
Hazardous Reactions: Reacts with strong acids to form tungstic acid
Incompatible Materials: Strong acids, strong oxidizers
Hazardous Decomposition Products: Sodium oxides, tungsten oxides released during fire or extreme conditions

Toxicological Information

Likely Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Toxicity: Harmful if swallowed, may irritate mucous membranes
Skin and Eye Contact: Causes irritation
Chronic Effects: Prolonged or repeated exposure can affect kidney and liver function
Sensitization: No known sensitizing effects
Carcinogenicity: Not listed as a carcinogen by OSHA, IARC, or NTP
Mutagenicity: No evidence of mutagenic effects
Other Data: Occupational exposure monitoring recommended for handling large quantities

Ecological Information

Ecotoxicity: Harmful to aquatic organisms, possible long-term adverse effects in the aquatic environment
Persistence and Degradability: Inorganic compound not readily biodegradable
Bioaccumulation Potential: Low potential due to chemical nature
Mobility in Soil: High mobility due to water solubility; may leach into groundwater
Other Adverse Effects: Avoid release to surface water, sewage, and soil to minimize environmental impact

Disposal Considerations

Disposal Method: Consign to licensed chemical waste disposal contractor
Waste Generation: Minimize quantity as much as possible
Container Handling: Rinse containers, dispose of according to local government regulations
Special Instructions: Do not discharge into drains or water courses
Regulatory Compliance: Comply with local, state, and national regulations for chemical waste

Transport Information

UN Number: Not regulated for transport under most regimes
Proper Shipping Name: Sodium tungstate dihydrate
Hazard Class: Not classified as dangerous for transport
Packing Group: Not applicable
Transport Label: None required for typical shipments
Special Precautions: Avoid creating dust, keep packaging intact during movement

Regulatory Information

Workplace Regulations: Subject to hazard communication requirements under OSHA standards
TSCA: Listed in the US Toxic Substances Control Act inventory
REACH Status: Registered under European REACH where applicable
Labelling: GHS and regional safety labelling required
Other Regulations: Check with local, regional, and national chemical safety agencies for updates specific to sodium tungstate dihydrate