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Product Name: Arsenic Pentoxide
Chemical Formula: As2O5
Synonyms: Diarsenic pentaoxide, Arsenic(V) oxide
CAS Number: 1303-28-2
Recommended Use: Laboratory reagent, wood preservative, manufacturing of pesticides and glass
Supplier: Chemical manufacturers and industrial suppliers (always check current packaging label for emergency contact)
Hazard Classification: Acute Toxicity (Oral, Inhalation, Dermal), Carcinogen, Environmental Hazard
Signal Word: Danger
Hazard Statements: Fatal if swallowed, toxic by inhalation and skin absorption, causes cancer, unsafe to aquatic life with long-term harm.
Precautionary Statements: Avoid breathing dust, wear protective gloves, eye protection, use only outdoors or in well-ventilated area, wash thoroughly after handling.
Chemical Name: Arsenic Pentoxide
Concentration: 100% (pure)
Impurities/Additives: Usually negligible, unless otherwise stated by manufacturer, check for trace heavy metals in production batches.
Eye Contact: Immediately flush eyes with large quantities of water for at least 15 minutes, lift eyelids frequently, seek urgent medical attention.
Skin Contact: Immediately remove contaminated clothing and wash skin with plenty of water and soap, avoid scrubbing harshly, seek medical care.
Inhalation: Move person to fresh air, keep at rest, provide oxygen if breathing difficulty develops, call emergency services.
Ingestion: Do not induce vomiting, rinse mouth with water, seek immediate medical advice, never give anything by mouth to an unconscious person.
Most Important Symptoms: Stomach pain, shock, convulsions, dizziness, vomiting, diarrhea, blue lips or nails may indicate severe poisoning.
Recommendations for Physicians: Monitor for signs of arsenic toxicity, supportive care, consider chelation agents such as dimercaprol if indicated.
Suitable Extinguishing Media: Use dry chemical powder, carbon dioxide, sand; avoid water directly on substance due to increased risk of environmental release or reaction.
Hazards from Combustion: Toxic arsenic oxides and fumes can form if heated, wear self-contained breathing apparatus and fire gear.
Precautions for Firefighters: Runoff can pollute waterways, isolate scene, evacuate area downwind, prevent unauthorized entry, and cool fire-exposed containers with water spray from a safe distance.
Personal Precautions: Evacuate area, use personal protective equipment (PPE) including gloves, goggles, and approved respirator, keep unprotected people away.
Environmental Precautions: Keep product out of drains, surface water, and soil, watch for spread with wind; inform authorities if large spills cause contamination.
Methods for Clean Up: Use non-sparking tools, cleanup using damp cloths or suitable vacuum with HEPA filter, collect in sealed containers for disposal, ventilate area, decontaminate surfaces with suitable solution (e.g., sodium hypochlorite followed by rinsing).
Safe Handling: Handle in fume hood or controlled workspace, avoid skin and eye contact, use appropriate PPE, avoid dust formation, maintain good hygiene in work area.
Storage Conditions: Store in tightly sealed, corrosion-resistant containers, in cool, dry, well-ventilated area; keep away from food, animal feed, acids, and direct sunlight.
Incompatibilities: Avoid moisture, strong acids, reducing agents as dangerous reactions and emissions can occur.
Engineering Controls: Use local exhaust ventilation, enclose process where feasible, monitor airborne concentration for workplace compliance.
Personal Protective Equipment: Wear chemical-resistant gloves (nitrile, neoprene), splash goggles or face shield, long-sleeved lab coat, use respiratory protection (NIOSH approved) if exposure may exceed limits.
Occupational Exposure Limit: OSHA/ACGIH limit for arsenic compounds (as As): 0.01 mg/m3 TWA
Hygiene Measures: Wash hands and face after handling, do not eat, drink, or smoke in areas where the chemical is used or stored.
Appearance: White, odorless, crystalline or powder solid
Molecular Weight: 229.84 g/mol
Boiling Point: Decomposes before boiling
Melting Point: 315°C (decomposes)
Solubility in Water: Soluble
Density: 4.32 g/cm3
Vapor Pressure: Negligible
pH (1% Solution): Acidic
Other Properties: Reacts with water to produce arsenic acids, corrosive to metal in moist air.
Chemical Stability: Stable under recommended storage, decomposes at high temperatures or with contact with acids.
Conditions to Avoid: Moisture, heat, incompatible materials.
Incompatible Materials: Strong reducing agents, acids, easily oxidizable organic matter.
Hazardous Decomposition Products: Arsenic trioxide, toxic arsenic fumes.
Reactivity: Strong oxidizer, may accelerate combustion.
Exposure Routes: Ingestion, inhalation, skin, and eye contact.
Acute Toxicity: Extremely toxic by all routes; LD50 (oral, rat): 8-32 mg/kg.
Chronic Effects: Carcinogen (IARC Group 1), skin and lung cancers, chronic arsenic poisoning (arsenicosis), skin lesions, nervous system effects.
Symptoms: Abdominal pain, vomiting, diarrhea, muscle cramps, paralysis, shock, possible convulsions and death.
Sensitization: Can cause severe dermatitis and conjunctivitis.
Target Organs: Liver, lungs, skin, kidneys, nervous system.
Toxicity to Aquatic Organisms: Highly toxic to fish and aquatic life, can bioaccumulate in water ecosystems.
Persistence and Degradability: Persists in environment, slow natural degradation.
Bioaccumulative Potential: High, concentrates in food chain.
Mobility in Soil: Mobile in acidic and moist soils, risk of groundwater contamination.
Other Environmental Hazards: Poisonous to birds and animals, kills soil microorganisms, legislation restricts large-scale use due to persistence and toxicity.
Disposal Methods: Collect as hazardous waste, use licensed hazardous waste disposal contractor, incineration recommended only in approved facilities with scrubbers.
Do Not: Do not pour down drain, bury, or release into environment.
Container Disposal: Decontaminate containers thoroughly before disposal, professional hazardous waste recycling recommended.
Regulatory Requirements: Comply with national, regional, and local hazardous waste laws.
UN Number: 1559
UN Proper Shipping Name: Arsenic pentoxide
Transport Hazard Class: 6.1 (Toxic substances)
Packing Group: I
Environmental Hazards: Marine pollutant, toxic to aquatic life.
Special Precautions: Only trained personnel should handle during transport, containers tightly closed, well labeled, use adequate secondary containment.
Applicable Regulations: International road, air, and sea transport regulations (IMDG, IATA, ADR).
Regulatory Status: Subject to strict international regulation as a toxic and carcinogenic substance, listed under various national hazard and chemical control acts.
OSHA Status: Regulated as a hazardous substance, occupational exposure limits enforced.
EPA Status: Listed as RCRA hazardous waste, subject to permit and reporting requirements.
SARA Title III: Extremely Hazardous Substance; reportable quantity applies.
TSCA: Listed on US Toxic Substances Control Act Inventory.
International Inventories: Included in EU, Canadian, Australian, Japanese chemical inventories; use subject to stringent restrictions and phase-out in many applications.
