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Product Name: Lead Arsenate
Chemical Formula: PbHAsO4 (dibasic), Pb2AsO4 (basic)
Synonyms: Lead(II) arsenate, Acid lead arsenate, Basic lead arsenate
Manufacturer: Contact information for supplier or manufacturer, including address and emergency telephone number
Recommended Use: Pesticide (historic, today largely banned due to toxicity); laboratory chemical; occasionally referenced for analytical uses
Restrictions on Use: Strong regulations in agriculture, banned or severely restricted in many countries due to acute and chronic health risks
Emergency Phone: Specific 24-hour contact from manufacturer or national poison center contact numbers
Classification: Acute Toxicity (Oral, Dermal, Inhalation — Category 1), Carcinogenicity (Category 1B), Reproductive toxicity (Category 1A), Specific Target Organ Toxicity — Repeated Exposure (Category 2)
GHS Label Elements: Skull and crossbones, Health hazard symbol, Environmental hazard
Signal Word: Danger
Hazard Statements: Fatal if swallowed, harmful in contact with skin, toxic if inhaled, may cause cancer, may damage fertility or unborn child, causes damage to organs through prolonged or repeated exposure, very toxic to aquatic life with long lasting effects
Precautionary Statements: Keep away from children, avoid all unnecessary exposure, do not breathe dust or fume, wash hands and face thoroughly after handling, wear suitable protective clothing/gloves/eye protection, do not release to environment
Chemical Name: Lead Arsenate
Concentration: 100%
CAS Number: 10124-36-4 (acid), 1327-31-7 (basic)
Relevant Impurities/Additives: May contain small amounts of other lead or arsenic compounds depending on manufacturing method
Molecular Weight: 347.14 (dibasic), 482.12 (basic)
Inhalation: Move person to fresh air, keep person calm and warm, seek immediate medical attention, provide rescue breathing or oxygen by trained personnel if breathing difficult
Skin Contact: Remove contaminated clothing, wash skin thoroughly with plenty of soap and water, seek medical attention if irritation or symptoms persist, wash clothing before reuse
Eye Contact: Rinse cautiously with water for at least 15 minutes, remove contact lenses if present and easy to do, seek prompt medical attention
Ingestion: Do not induce vomiting, rinse mouth with water, seek IMMEDIATE medical attention — lead arsenate is extremely toxic, administer activated charcoal if possible by medical staff
Important Symptoms/Effects: Nausea, vomiting, abdominal pain, diarrhea, dizziness, headache, confusion, convulsions, possible loss of consciousness and multiorgan failure
Suitable Extinguishing Media: Use dry chemical, CO2, water spray or regular foam, choose extinguishing method suitable for surrounding fire
Hazards from Fire: Lead arsenate is not itself combustible, may decompose at high temperatures generating toxic and irritating fumes such as arsenic oxides and lead fumes
Protective Equipment: Firefighters wear self-contained breathing apparatus (SCBA) and full protective suit due to release of highly toxic fumes
Special Precautions: Prevent fire runoff containing chemical from entering drains or watercourses, stay upwind of fire scene and avoid inhalation of decomposition products
Personal Precautions: Evacuate non-essential personnel, avoid raising dust, do not touch or walk through spilled material, ventilate area, use personal protective equipment including respiratory protection, gloves and coveralls
Environmental Precautions: Prevent runoff to soil, surface water, or drains, notify authorities if large spill reaches environment, contain spillage with non-combustible absorbent material such as sand or earth
Cleanup Methods: Sweep or shovel spilled material into sealable, labelled containers for proper disposal, clean area thoroughly after collection, avoid dry sweeping to minimize dust, consider vacuuming with equipment fitted with HEPA filter
Decontamination: Wash affected surfaces with damp cloth or mop, avoid washing into drains, collect and dispose of contaminated water and materials safely
Handling: Handle in a chemical fume hood, use proper personal protective equipment including gloves, goggles, and lab coat, avoid generating dust, do not eat, drink or smoke when handling, wash hands and face after use
Storage Conditions: Store locked up, in tightly closed containers, in a cool dry well-ventilated area away from incompatible materials such as strong acids or bases, flammable substances, and food or feedstuffs
Incompatibilities: Avoid contact with strong acids (may release toxic gases), oxidizers, reducing agents, do not store with edible substances or animal feed
Special Requirements: Keep away from children, unauthorized personnel, and wildlife, ensure storage containers are clearly labelled and in good condition
Occupational Exposure Limits: Lead: OSHA PEL 0.05 mg/m³ (as Pb), Arsenic: OSHA PEL 0.01 mg/m³ (as As), ACGIH TLV 0.01 mg/m³
Engineering Controls: Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure limits
Eye/Face Protection: Chemical safety goggles and face shield as needed
Skin Protection: Chemical-resistant gloves (e.g., nitrile or neoprene), long-sleeved lab coat, impervious apron for large-scale or industrial handling
Respiratory Protection: NIOSH-approved respirators suitable for protection against particulate lead arsenate, required during handling, cleanup, and in poorly ventilated areas
Hygiene Measures: Do not eat, drink, or smoke during use, wash hands and face immediately after use, remove protective equipment and clothing before leaving work area
Appearance: White to grayish-white powder
Odor: Odorless
Melting Point: Decomposes before melting
Boiling Point: Not applicable (decomposes)
Solubility: Slightly soluble in water, higher solubility in dilute acids
Density: 6.86 g/cm³ (acid), 7.14 g/cm³ (basic)
Vapor Pressure: Not applicable
pH: Neutral to slightly acidic (aqueous suspension)
Other Characteristics: Stable in dry air, may form toxic dust, reacts with acids to release toxic gases
Chemical Stability: Stable under normal storage and handling conditions
Reactivity: Reacts with strong acids to form toxic arsine gas, hazardous reaction with strong reducing agents
Hazardous Decomposition Products: Lead fumes, arsenic oxides, arsenic gas at high temperatures
Polymerization: Does not occur
Other Risks: Generation of dust during movement or transfer can sharply increase risk of inhalation
Acute Toxicity: Extremely toxic by ingestion, inhalation, and skin absorption, LD50 (oral, rat) 105 mg/kg
Chronic Effects: Chronic exposure may cause arsenic and lead poisoning; symptoms include anemia, nerve damage, kidney damage, gastrointestinal disorders, skin changes, neurological symptoms, reproductive harm, and carcinogenesis (IARC: Human carcinogen)
Carcinogenic Effects: Both arsenic and lead are known human carcinogens; linked to lung, skin, bladder, and stomach cancers
Target Organs: Blood, nervous system, kidneys, liver, reproductive organs, skin
Symptoms of Exposure: Headache, nausea, vomiting, abdominal pain, muscle weakness, mental changes, tremors, convulsions, loss of consciousness, possible death in high exposures
Sensitization: May cause skin or respiratory sensitization
Ecotoxicity: Highly toxic to aquatic organisms, causes long-term adverse effects in aquatic environments, persistence in soil and water
Bioaccumulation: Lead and arsenic bioaccumulate in organisms at all food chain levels, can enter human food supply through contaminated crops and animals
Mobility in Soil: Moderately immobile, but long use leads to contaminated soils, surface and ground waters
Degradation: Lead arsenate persists indefinitely in the environment, does not chemically break down on its own
Additional Hazards: Legacy pollution at old orchards, agriculture fields, property values and health risks around former use areas
Waste Treatment: Handle as hazardous waste, comply with federal, state, and local laws for toxic waste; incineration not suitable due to generation of toxic fumes
Containers: Dispose of in tightly-sealed, properly labelled containers at an approved hazardous waste facility
Environmental Protection: Do not dispose of into drains, water bodies, or regular garbage; avoid contamination of soils and water
Special Notes: Decontaminate tools and equipment after use, minimize personal exposure, document and record all disposals as required by law
UN Number: UN1616
UN Proper Shipping Name: Lead Arsenate
Transport Hazard Class: 6.1 (Toxic substances)
Packing Group: II
Labels: Toxic, Environmental Hazard
Special Precautions: Ensure containers are properly secured and labelled during transport; check national and international regulations; transport only via registered carriers
U.S. Regulations: Listed as hazardous under CERCLA, SARA Title III, RCRA, TSCA; EPA and OSHA strictly regulate workplace and environmental release
International Regulation: Banned or heavily restricted for manufacture, import, and use in most countries (EU, Canada, Australia, Japan, others)
Carcinogen Status: Classified as Group 1 by IARC; NTP and EPA list as known human carcinogen (arsenic and lead compounds)
Other References: Check country, state, or local substance schedules and poison regulations for specific requirements and compliance obligations
Worker Protection: Strict exposure and training requirements, full documentation and record-keeping for workplaces, periodic medical surveillance for risk groups
