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Chemical Name: Lead Arsenite
Synonyms: Lead orthoarsenite, PbHAsO3
Recommended Use: Industrial pigment, historic insecticide
Manufacturer/Supplier: Contact supplier or lab for emergency information
Emergency Contact: Emergency phone numbers vary by location and workplace requirements
CAS Number: 1327-31-7
Classification: Acute Toxicity (Oral, Dermal, Inhalation), Carcinogen, Reproductive Toxin, Environmental Hazard
Signal Word: Danger
Hazard Statements: Causes cancer, suspected of damaging fertility, causes damage to organs through prolonged exposure, toxic if swallowed or inhaled, toxic to aquatic life
Pictograms: Skull and crossbones, Health hazard, Environmental hazard
Precautionary Statements: Avoid all contact, wear protective clothing, keep out of water sources, do not eat/drink/smoke when handling, seek medical advice after exposure
Chemical Identity: Lead Arsenite
Concentration: 100% (Technical grade)
Molecular Formula: PbHAsO3
Hazardous Components: Elemental lead compounds, arsenic compounds
Impurities: May contain traces of other lead or arsenic salts depending on source
Eye Contact: Rinse immediately with plenty of water, remove contact lenses if present, seek medical care without delay
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water, obtain medical assistance
Inhalation: Remove person to fresh air, keep at rest, administer oxygen if breathing is difficult, get immediate medical attention
Ingestion: Do not induce vomiting, rinse mouth, seek urgent medical attention, note poisoning symptoms may delay
Symptoms: Abdominal pain, nausea, headache, weakness, confusion, organ damage signs may follow, chronic poisoning causes anemia, nerve, kidney, and reproductive harm
Suitable Extinguishing Media: Dry chemical, foam, carbon dioxide, sand; avoid water streams that may spread contaminated runoff
Unsuitable Media: Water jet, can spread contamination
Hazards from Combustion: Toxic fumes of lead oxides and arsenic oxides evolve in fire
Protective Equipment: Wear self-contained breathing apparatus and chemical protective clothing
Special Procedures: Evacuate surroundings, cool containers from safe distance, avoid inhaling fumes, prevent contaminated runoff
Personal Precautions: Evacuate unnecessary personnel, put on appropriate PPE, avoid dust formation, avoid breathing dust
Environmental Precautions: Prevent entry into drains, water courses, and soil; containment required by hazardous chemical protocols
Cleanup Methods: Collect dry powder by wet brushing or vacuum with HEPA filter, transfer to sealed container for disposal, ventilate area thoroughly
Decontamination: Wash area with phosphate cleaning solution when appropriate, keep waste for authorized disposal only
Safe Handling: Work in fume hood or well-ventilated area, minimize dust generation, change contaminated clothing promptly, never eat, drink, or smoke when handling, keep tools clean of residue, label area
Storage Conditions: Store in tightly sealed, corrosion-resistant containers outside of direct sunlight, in a cool, dry, locked, poison designated area, away from incompatible substances such as strong acids, oxidizers, reducing agents
Storage Incompatibilities: Keep away from ammonium salts, finely divided combustible materials, sources of ignition, acids and bases; store apart from foodstuffs and animal feed
Engineering Controls: Local exhaust ventilation, fume hoods, avoid accumulation of dust; maintain strict hygiene controls; regular cleaning of surfaces
Occupational Exposure Limits: Lead: ACGIH TLV 0.05 mg/m³, OSHA PEL 0.05 mg/m³; Arsenic: OSHA PEL 0.01 mg/m³ (check specific jurisdiction)
Personal Protective Equipment: Full body chemical-resistant clothing, gloves (nitrile, neoprene), eye protection (chemical goggles or face shield), NIOSH-approved respirator for particulates, closed-toe footwear
Hygiene Measures: Wash hands face and exposed areas after handling, before eating or smoking, routinely launder contaminated clothing, shower after work, schedule regular blood and urine monitoring for exposed workers
Appearance: Pale yellow or white powder, odorless
Melting Point: Decomposes on heating
Boiling Point: Not applicable (decomposes)
Solubility: Slightly soluble in water, soluble in acids
Density: About 6.2 g/cm³
Vapor Pressure: Not applicable
pH: No data available
Odor: Odorless
Partition Coefficient: Not determined
Other Properties: Stable under normal conditions but breaks down in presence of acids, releases toxic fumes when heated
Chemical Stability: Stable under recommended storage and handling conditions, decomposes at high temperatures
Reactivity: Reacts with acids to release toxic arsine and lead vapors, incompatible with oxidizers
Hazardous Decomposition Products: Lead oxides, arsenic oxides, possibly arsine
Incompatible Materials: Strong oxidizing agents, strong acids, strong bases, reducing agents, ammonium compounds
Other Dangers: Sensitive to light and moisture, chemical reactivity is dangerous for both workers and environment
Routes of Exposure: Skin, eye, inhalation, ingestion
Acute Toxicity: Oral LD50 (rat): 17 mg/kg; Inhalation: Highly toxic in dust form
Chronic Toxicity: Long-term exposure damages kidneys, liver, nervous system, reproductive system; accumulates in tissues; proven carcinogen (IARC Group 1); may cause anemia and gastrointestinal symptoms
Symptoms of Overexposure: Weakness, headache, vomiting, abdominal cramps, neuropathy, behavioral changes, reproductive and developmental toxicity evident at low doses
Sensitization: Not known
Other Risks: Hazardous at all exposure levels, especially for children and pregnant women
Ecotoxicity: Acute aquatic toxicity to fish and invertebrates; extremely toxic to algae, plants, aquatic organisms at low concentrations
Persistence: Does not degrade readily; long half-life in soil and sediment
Bioaccumulation: Accumulates in living tissues of aquatic and terrestrial organisms
Mobility: Low mobility in dry soils, higher in acidic or waterlogged conditions
Other Environmental Hazards: Contaminates drinking water, biomagnifies up the food chain, promotes long-term environmental contamination, regulatory authorities restrict environmental releases
Waste Treatment Methods: Collect and dispose of as hazardous waste in sealed, clearly labeled containers
Disposal Regulations: Strict controls by hazardous waste regulations (e.g., RCRA, EU Hazardous Waste Directive)
Disposal Recommendations: Professional hazardous waste contractor recommended, never discharge to environment or drains, follow government instructions
Contaminated Packaging: Decontaminate and dispose of as hazardous waste
Special Precautions: Keep records of waste produced and method of disposal for compliance
UN Number: 1616
Proper Shipping Name: Lead compound, n.o.s. (including lead arsenite)
Transport Hazard Class: 6.1 (Toxic substance)
Packing Group: II
Label: Toxic
Marine Pollutant: Yes
Special Transport Measures: Use certified containers, provide transport documents, all handlers must be trained and equipped, emergency procedures must be in place according to transport regulations
International Regulations: Subject to restrictions under Rotterdam Convention, European REACH, US TSCA
Occupational Safety: OSHA, NIOSH, ACGIH standards apply, mandatory risk assessments, reporting requirements for hazardous exposure
Environmental Regulation: Classified as hazardous waste, regulated for air, water, and soil discharge, used only under permit, strict environmental monitoring
Local/National Regulations: Compliance with country-specific registration, handling, manufacturing, import/export, and use requirements varies, some countries prohibit non-research use
Worker Right-to-Know: Material covered by workplace hazard communication standards
