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Product Name: Sodium Arsenite
Chemical Formula: NaAsO2
Synonyms: Sodium meta-arsenite, Sodium arsenious oxide
CAS Number: 7784-46-5
Recommended Use: Laboratory reagent, wood preservative, pesticide (restricted)
Supplier: Chemical manufacturers and laboratory supply companies
Emergency Contact: Local poison control, fire department, company safety officer, or qualified hazardous materials expert
GHS Classification: Acute toxicity (oral, dermal, inhalation); Carcinogen category 1A; Aquatic acute and chronic hazard
Signal Word: Danger
Hazard Statements: Fatal if swallowed, in contact with skin, or if inhaled; May cause cancer; Very toxic to aquatic life with long lasting effects
Precautionary Statements: Avoid breathing dust or fume; Wear protective gloves and clothing; Do not eat or drink when handling; Use only outdoors or in well-ventilated areas; Avoid release to the environment
Main Ingredient: Sodium Arsenite
Chemical Formula: NaAsO2
Concentration: Typically >95% in pure form
Impurities: Trace amounts of sodium carbonate or sodium sulfate depending on synthesis process
Inhalation: Move person to fresh air immediately; seek emergency medical attention; if breathing stops, begin artificial respiration by trained personnel
Skin Contact: Remove contaminated clothing and rinse skin with copious amounts of water for at least 15 minutes; seek urgent medical evaluation
Eye Contact: Rinse eyes cautiously under running water for 15-20 minutes; keep eyelids apart; remove contact lenses if present; obtain medical help quickly
Ingestion: Do not induce vomiting; rinse mouth with water; seek immediate medical attention; never give anything by mouth if the person is unconscious or having convulsions
Suitable Extinguishing Media: Use dry chemical, carbon dioxide (CO2), or foam; water spray can be used to cool containers
Unsuitable Extinguishing Media: High pressure water streams may spread contamination
Hazardous Combustion Products: Toxic metal oxides and arsenic vapors
Special Protective Equipment: Firefighters wear self-contained breathing apparatus (SCBA) and full protective gear; avoid inhaling fumes or dust
Fire/Explosion Risk: Non-combustible itself, but heating or contact with acids may generate toxic arsenic fumes
Personal Precautions: Only trained personnel should enter the contaminated area; evacuate unprotected individuals
Protective Equipment: Use chemical splash goggles, gloves made of suitable resistant material, full-suit, boots, and respiratory protection
Spill Cleanup Methods: Avoid raising dust; collect with non-sparking tools and place in dry, labeled, sealed containers; avoid washing into sewers
Environmental Precautions: Prevent entry into water sources, drains, soil, or vegetation; notify authorities if significant contamination occurs
Handling: Work in fume hood or well-ventilated area; avoid direct physical contact with material; do not eat, drink, or smoke while handling
Storage: Store in tightly closed, labeled containers in a cool, dry, secure, and well-ventilated place; segregate from acids, food, and incompatible substances; restrict access to authorized personnel
Exposure Limits: OSHA PEL (TWA) 0.01 mg/m3 (as arsenic); ACGIH TLV 0.01 mg/m3 (as As)
Engineering Controls: Fume hood or local exhaust ventilation to control airborne dust/fume; safety shower and eyewash station nearby
Personal Protective Equipment (PPE): Lab coat, chemical-resistant gloves (nitrile, neoprene), chemical splash goggles, and respirator (NIOSH-approved) during risk of airborne exposure
Appearance: White to gray, crystalline, odorless solid
Molecular Weight: 129.91 g/mol
Melting Point: 500°C (decomposes)
Solubility: Highly soluble in water
Vapor Pressure: Not applicable (non-volatile solid)
Density: Approximately 2.5 g/cm3
pH: Alkaline (solution in water)
Chemical Stability: Stable under normal temperature and pressure when kept dry
Reactivity: Reacts with strong acids to produce highly toxic arsine gas
Hazardous Decomposition: Arsenic oxides, sodium oxides
Incompatibility: Strong acids, oxidizing agents, reducing agents
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Effects: Nausea, vomiting, diarrhea, headache, dizziness, rapid heartbeat, hemorrhage, shock, potentially fatal effects on cardiovascular and nervous system
Chronic Effects: Cancer (lung, skin, liver), skin lesions, anemia, peripheral neuropathy, reproductive toxicity
LD50: ~15-30 mg/kg (oral, rat)
Carcinogenic Status: IARC Group 1 (carcinogenic to humans)
Other Data: Evidence links exposure to increased risk of cardiovascular disease, neuropathies, and diabetes
Aquatic Toxicity: Highly toxic to fish, algae, and aquatic invertebrates
Persistence and Degradability: Does not readily degrade in the environment; persists and bioaccumulates
Ecological Risk: Potential for long-term adverse impact in soil and water environments; disrupts natural food webs
Mobility: Leaches into groundwater from contaminated sites, can be transported over long distances
Waste Disposal Methods: Must treat as hazardous waste; disposal at licensed facility with appropriate chemical neutralization and secure landfill practices
Contaminated Packaging: Triple rinse, then treat as hazardous waste
Disposal Regulations: Follow local, regional, and national laws for hazardous substances; do not release into drains, sewers, or natural bodies of water to avoid contamination
UN Number: UN1685
Proper Shipping Name: SODIUM ARSENITE
Hazard Class: 6.1 (Toxic substances)
Packing Group: I (highest danger)
Label: Toxic (skull and crossbones), Environmental hazard symbol where applicable
Transport Precautions: Secure packaging; clear hazard marking; transport by registered carriers only; avoid transport with incompatible materials or in passenger compartments
US TSCA: Listed on the Toxic Substances Control Act inventory
SARA Title III: Listed as an extremely hazardous substance
OSHA: Hazardous by definition of Hazard Communication Standard
CERCLA: Subject to emergency release reporting requirements (RQ: 1 lb)
California Proposition 65: Listed as a chemical known to cause cancer and reproductive toxicity
EU Regulations: REACH Annex XIV (authorisation required); CLP Regulation (EC) No 1272/2008: Acute Tox. 2; Carc. 1A; Aquatic Chronic 1
Other Regulatory Status: Import, export, and use may be subject to license due to toxicity and carcinogenic risk
