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Product Name: Potassium Arsenate
Chemical Formula: K3AsO4
Synonyms: Tripotassium arsenate, potassium metaarsenate
CAS Number: 7784-41-0
Recommended Use: Laboratory reagent, manufacturing processes
Supplier: Industrial chemical distributors, research suppliers
Emergency Number: Refer to local poison control center or chemical emergency line
Classification: Acute toxicity (oral, dermal, inhalation), carcinogenicity, aquatic chronic hazard
Signal Word: Danger
Hazard Statements: Fatal if swallowed, in contact with skin, or if inhaled; causes cancer; toxic to aquatic organisms with long-lasting effects
Pictograms: Skull and crossbones, health hazard, environment
Precautionary Statements: Avoid all contact; do not breathe dust; wash hands thoroughly after handling; wear protective gloves, clothing, and eye protection.
Chemical: Potassium Arsenate
Concentration: >99% by weight
CAS Number: 7784-41-0
Impurities: May include trace potassium oxides and unreacted starting materials
General Information: Take victim away from exposure; seek immediate medical attention
Inhalation: Move to fresh air; provide oxygen if breathing is difficult; call a physician without delay
Skin Contact: Remove contaminated clothing; rinse skin thoroughly with water for several minutes; seek immediate medical advice
Eye Contact: Rinse cautiously with water for at least fifteen minutes; remove contact lenses; continue rinsing and get help
Ingestion: Rinse mouth; do not induce vomiting; call poison control and physician immediately
Notes for Doctors: Provide symptomatic and supportive care; arsenic toxicity treatment protocols may apply, including chelation therapy
Suitable Extinguishing Media: Dry chemical, foam, carbon dioxide, or water spray
Unsuitable Media: Avoid direct water jet; risk of chemical runoff
Specific Hazards: Emits toxic fumes of arsenic oxides and potassium compounds on combustion
Protective Equipment: Wear self-contained breathing apparatus and full protective suit
Special Procedures: Remove material from fire area if safe to do so; contain contaminated run-off to prevent environmental contamination
Personal Precautions: Evacuate area, avoid all contact with spilled substance, ventilate space, use suitable protective equipment
Environmental Precautions: Prevent entry to sewers, soil, and waterways
Methods for Cleanup: Wear appropriate protective gear; use non-sparking tools; sweep up without generating dust; collect spilled material in secure, labeled containers for disposal; decontaminate area thoroughly after cleanup
Safe Handling: Avoid creating dust; work inside chemical fume hood; prevent contact with skin, eyes, and clothing; do not ingest; keep containers tightly sealed
Storage Requirements: Store in cool, well-ventilated area, away from incompatible materials such as strong acids, reducing agents, and combustibles; keep in tightly closed containers that are clearly labeled; protect from moisture and direct sunlight; restrict access to trained personnel only
Exposure Limits: OSHA PEL for inorganic arsenic: 0.01 mg/m3 (as As)
Engineering Controls: Use fume hood, local exhaust ventilation, sealed systems where possible
Personal Protective Equipment: Chemical-resistant gloves (nitrile, butyl rubber), protective clothing, safety goggles, face shield, respiratory protection (NIOSH-approved for particulates or arsenic compounds)
Hygiene Measures: Wash hands, forearms, and face after handling; do not eat, drink, or smoke in work area; remove contaminated clothing before leaving area
Appearance: White crystalline powder
Odor: Odorless
Solubility: Soluble in water
Melting Point: Decomposes before melting, above 800°C (1472°F)
vapor pressure: Not applicable
Boiling Point: Not available (decomposes)
Density: 2.57 g/cm3
pH (1% solution): Approximately 11.0
Other Data: Hygroscopic; forms alkaline solutions that can be corrosive
Chemical Stability: Stable under normal temperatures and pressures with tightly sealed containers
Reactivity: Strong oxidizing properties; reacts with acids to form toxic arsenic gases
Hazardous Decomposition: Releases arsenic oxides, potassium compounds, and other toxic fumes
Incompatibles: Strong acids, reducing agents, combustibles, aluminum, magnesium
Polymerization: Does not polymerize
Routes of Exposure: Inhalation, ingestion, absorption through skin and eyes
Acute Effects: Highly toxic by all exposure routes; symptoms can include nausea, vomiting, abdominal pain, muscle weakness, and cardiac arrhythmias
Chronic Effects: Cumulative systemic poison; prolonged exposure linked to skin lesions, cancer (lung, bladder, skin), anemia, and neurotoxic effects
LD50 (oral, rat): Estimated below 20 mg/kg
Carcinogenicity: Listed as known human carcinogen by IARC, NTP, and OSHA
Other Data: Chronic inhalation or ingestion associated with damage to kidneys, liver, peripheral nerves, hematopoietic system
Aquatic Toxicity: Highly toxic to aquatic organisms, including fish and invertebrates; bioaccumulates in aquatic food chains
Persistence and Degradability: Not readily biodegradable; remains in soil and sediments for decades
Mobility in Soil: Can migrate with groundwater under certain conditions; binds strongly to mineral surfaces but can leach in acidic soils
Other Adverse Effects: Potential to cause long-term and large-scale harms to fish, plants, wildlife through bioaccumulation and persistence; strict environmental controls required for any release
Product Disposal: Must be disposed of as hazardous waste in accordance with local, regional, and international regulations; do not release to environment
Container Disposal: Triple-rinse empty containers, then puncture or crush and properly label prior to submission as hazardous waste; do not reuse packaging
Recommended Treatment: Chemical deactivation and incineration in approved hazardous waste facilities; never discharge waste to drains, sewers, or normal trash routes
UN Number: UN 1559
Proper Shipping Name: Arsenates, inorganic, solid, n.o.s. (Potassium Arsenate)
Transport Hazard Class: 6.1 (Toxic substances)
Packing Group: I (high danger)
Labels: Toxic (skull and crossbones symbol)
Special Provisions: Protect from moisture, isolate from food and feed in transit, emergency response instructions required
Regulatory Requirement: DOT, IATA, IMDG compliant packaging, documentation, and notification
US Regulation: Listed as Extremely Hazardous Substance (SARA Title III Section 313), EPA-designated toxic pollutant under Clean Water Act
OSHA Classification: Regulated carcinogen, acute toxin
International Chemical Inventory: Listed on TSCA, EINECS, and other global inventories; subject to export notification under US and international laws
Other Guidance: Users must maintain training records, implement exposure monitoring, and provide medical surveillance as mandated under worker protection laws; emergency plans and environmental permits required for storage and use above threshold quantities
