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Product Name: Calcium Arsenite
Chemical Formula: CaHAsO3
CAS Number: 13464-33-0
Synonyms: Calcium Hydrogen Arsenite, Calcium Arsenite
Recommended Use: Used in pesticides, fungicides, chemical manufacturing
Manufacturer: Contact the chemical supplier for specifics
Emergency Contact: Refer to local workplace emergency numbers or Poison Control
Classification: Acute Toxicity – Oral (Category 2), Carcinogenicity (Category 1B), Reproductive Toxicity (Category 1B)
Signal Word: Danger
Pictograms: Skull and crossbones, Health hazard
Hazard Statements: Fatal if swallowed; Suspected of causing cancer; Causes damage to organs through prolonged exposure; Suspected of damaging fertility or unborn child
Precautionary Statements: Do not eat, drink, or smoke when using this product; Wear protective gloves and eye/face protection; Obtain special instructions before use; Store locked up; Dispose in accordance with regulations
Chemical Name: Calcium Arsenite
Common Name: Calcium Hydrogen Arsenite
Purity: 95–100%
Other Components: Trace contaminants vary with manufacturer
Ingredient Disclosure: Contains no inert material considered non-hazardous under GHS
Inhalation: Move person into fresh air. Remove contaminated clothing and loosen tight clothing. Seek immediate medical attention. Artificial respiration may be needed if breathing stops.
Skin Contact: Remove all contaminated clothing, shoes, and jewelry. Wash affected area with large amounts of water and mild soap for at least 15 minutes. Do not use organic solvents. Get medical help if irritation or signs of poisoning appear.
Eye Contact: Rinse eyes cautiously with water for at least 15 minutes, lifting eyelids occasionally to ensure thorough flushing. Remove contact lenses if present and easy to do. Get medical attention without delay.
Ingestion: Rinse mouth carefully. If the person is conscious, offer small amounts of water to drink. Never give anything by mouth if unconscious. Seek immediate medical assistance and contact poison control.
Most Important Symptoms/Effects: Poisoning symptoms can include nausea, vomiting, abdominal pain, headache, weakness, dizziness, confusion, skin eruptions, convulsions, or even death.
Suitable Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or alcohol-resistant foam.
Unsuitable Extinguishing Media: Avoid direct water jet on substance, as contamination can spread.
Specific Hazards: Emits toxic fumes of arsenic and calcium oxides when heated or on fire. Dust can form explosive mixtures with air.
Protective Equipment: Firefighters require self-contained breathing apparatus and full protective gear.
Special Procedures: Remove containers from fire area if safe. Contain fire water to prevent environmental contamination.
Personal Precautions: Restrict access to area. Wear chemical-resistant gloves, impermeable clothing, safety goggles, and NIOSH-approved respirator.
Environmental Precautions: Prevent spillage from entering drains, soil, waterways, or sewers. Dike material where possible.
Cleanup Methods: Collect spilled solid with non-sparking tools. Avoid dust generation. Place in suitable, clearly labeled, closed containers for disposal.
Decontamination: Wash surface with soapy water. Ventilate area thoroughly before re-entry.
Safe Handling: Use in well-ventilated areas. Avoid creating dust or inhaling powder. Keep away from food, drinks, and animal feed. Wear proper personal protective equipment.
Hygiene Measures: Wash hands and face after handling. Do not eat, drink, or smoke during use.
Storage Requirements: Store in original, tightly closed container, away from incompatible materials like acids and strong oxidizers. Secure storage in a dry, cool, well-ventilated place. Store out of reach of children. Label storage area with hazard warnings.
Incompatibilities: Acids, oxidizing agents, and reducing agents.
Engineering Controls: Use local exhaust ventilation or process enclosures to minimize dust levels. Wash facilities and eyewash stations should be accessible.
Personal Protective Equipment:
Respiratory Protection: Use approved particulate respirator if airborne concentrations exceed recommended limits.
Skin Protection: Wear chemical-resistant gloves, long-sleeved protective clothing.
Eye/Face Protection: Safety goggles or face shield.
Occupational Exposure Limits: OSHA PEL arsenic compounds (as As): 0.01 mg/m³ TWA; NIOSH REL: 0.002 mg/m³ TWA.
Environmental Precaution: Regularly monitor for dust and arsenic levels in work areas.
Appearance: White to off-white crystalline powder
Odor: Odorless
pH (Aqueous): Slightly basic
Melting Point: 200 °C (decomposes)
Solubility: Insoluble in water
Density: Around 3.6 g/cm³
Vapor Pressure: Negligible at room temperature
Partition Coefficient: Not applicable
Boiling Point: Not applicable (decomposes before boiling)
Chemical Stability: Stable under normal temperatures and pressures if kept dry and in a sealed container.
Reactivity: Reacts with acids, generating highly toxic arsine gas.
Hazardous Decomposition Products: Arsenic oxides, calcium oxides, arsine gas on strong acid exposure.
Incompatible Materials: Acids, strong oxidizers, and reducing agents.
Conditions to Avoid: Heat, humidity, exposure to acids, poor ventilation
Routes of Exposure: Inhalation, skin absorption, ingestion, eye contact
Acute Toxicity: Highly toxic; oral LD50 (rat): 15 mg/kg. Repeated exposure causes severe multi-organ effects.
Chronic Effects: Cancer, skin lesions, systemic poisoning, reproductive harm, cognitive and developmental damage in children
Symptoms of Overexposure: Stomach pain, vomiting, diarrhea, weakness, convulsions, coma, death
Carcinogenicity: Classified as Group 1 (known human carcinogen) by IARC, OSHA, NTP
Other Information: Arsenic toxicity is cumulative; avoidance of repeated exposure is critical
Aquatic Toxicity: Extremely toxic to aquatic life, even at low concentrations
Persistence and Degradability: Persistent in soil and water; does not readily degrade
Bioaccumulative Potential: Arsenic compounds accumulate in living organisms; enters food chain
Mobility in Soil: Binds to soil minerals but may leach into groundwater in acidic or low-iron conditions
Other Negative Effects: Long-term arsenic contamination reduces biodiversity, endangers drinking water supplies, and threatens agriculture
Waste Disposal Procedures: Treat as hazardous waste under RCRA regulations. Collect residues and spilled material in sealed, labeled hazardous waste containers.
Recommended Disposal Method: High-temperature incineration by licensed facility, or long-term stabilization and secure landfill recognized for toxic heavy metals.
Disposal of Contaminated Packaging: Decontaminate containers or dispose as hazardous waste under environmental regulations.
Prohibition: Do not dispose in domestic waste or watercourses. Follow all federal, state, and local regulations for hazardous materials.
UN Number: UN 1557
Proper Shipping Name: Arsenic compound, solid, n.o.s. (Calcium Arsenite)
Class: 6.1 (Toxic Substances)
Packing Group: II
Labeling Requirements: Toxic hazard labels required
Special Precautions: Secure packaging to prevent leaks; restrict access during transport; avoid mechanical shock or impact
Regulatory Modalities: DOT, IMDG, IATA rules apply
Environmental Hazards: Marine pollutant – controls required for shipment over water
TSCA: Listed under the Toxic Substances Control Act
SARA Title III: Subject to Sections 302 and 313 reporting
OSHA: Regulated as an arsenic compound – strict workplace controls
CERCLA Reportable Quantity: 1 pound (0.454 kg)
RCRA: Hazardous Waste Number P012
State Regulations: Listed as a substance of high concern in California Proposition 65
International: Covered by EU REACH, PIC, and the Stockholm Convention on POPs
