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Chemical Name: Sodium Metarsenate
Formula: NaAsO3
Appearance: White crystalline or granular solid
Odor: None
Common Uses: Used as a herbicide and pesticide, has industrial relevance where arsenic compounds are needed in chemical syntheses
Solubility: Readily dissolves in water, which increases mobility in the environment and the likelihood of contamination incidents
Market Profile: Found in sectors needing potent weed or pest control, not common for home use due to toxicity
Main Risks: Highly toxic if swallowed, inhaled, or comes into contact with skin
Acute Symptoms: Nausea, vomiting, abdominal pain, diarrhea, dizziness, confusion, and in severe cases, shock or death
Chronic Exposure: Long-term health effects include skin lesions, neuropathy, increased cancer risk, and organ damage
Environmental Hazard: Highly toxic to aquatic life, accumulates in soil and water, persistent in ecosystems
Routes of Exposure: Inhalation of dust, skin contact, ingestion of contaminated food or drinking water
Main Ingredient: Sodium Metarsenate
Arsenic Content: Contains arsenic in a pentavalent oxidation state, which poses significant health and environmental risks
Typical Purity: Industrial products contain high concentrations, few impurities
Toxicological Concerns: Arsenic compounds continually rank among the most hazardous substances, and even small impurities can influence overall toxicity
Inhalation: Remove to fresh air immediately, avoid further exposure, provide medical attention as soon as possible
Ingestion: Do not induce vomiting, rinse mouth, seek medical help urgently as rapid absorption can occur
Skin Contact: Wash skin with soap and water for at least 15 minutes, remove contaminated clothing, consult a physician
Eye Contact: Rinse eyes with running water for at least 15 minutes, keep eyelids open, and seek prompt medical care
Symptoms That Require Immediate Intervention: Breathing difficulty, severe abdominal pain, unconsciousness
Sensitivity: Not known to be flammable, but can release toxic vapors of arsenic oxides if exposed to high heat or flame
Extinguishing Agents: Use standard firefighting foam, dry chemical, or carbon dioxide
Risks to Firefighters: Smoke from chemical fires involving sodium metarsenate contains hazardous arsenic compounds, personal protective gear and positive pressure breathing apparatus needed
Special Considerations: Contaminated runoff can pollute water sources, fire crews must control effluent from firefighting activities
Precautions: Block off the area to prevent access, use personal protective equipment like gloves and respirators
Containment: Collect spilled material with non-sparking tools, avoid dust creation
Clean-Up: Place all contaminated material in secure, labeled containers for safe disposal
Environmental Response: Prevent run-off into drains, surface water, or soil as even small spills can have persistent consequences for local ecosystems
Aftermath: Decontaminate spill area thoroughly and monitor for residual contamination
Personal Safety: Limit direct handling, keep material sealed and in well-ventilated spaces
Temperature and Humidity: Store in cool, dry areas away from incompatible substances like acids or strong oxidizers
Access Controls: Only trained individuals should handle, secure storage to restrict unauthorized entry
Spill Preparedness: Facilities must keep readily available spill kits and clear guidance on emergency response
Engineering Controls: Local exhaust ventilation, use of closed systems to minimize airborne particles
Personal Protective Equipment: Respirators, chemical-resistant gloves, protective clothing, safety goggles
Work Environment: Regular air monitoring for arsenic, routine surface wipe tests in workplaces
Hygiene Practices: Wash hands and face before breaks, never eat, drink, or smoke during use, prompt decontamination routines
Form: Solid, likely powder or crystalline
Color: White or off-white
Solubility in Water: High
Odor: Odorless
Melting Point: Decomposes before melting
Stability in Storage: Stable under normal conditions, sensitive to acids
Chemical Stability: Remains stable in a dry atmosphere away from direct sunlight
Reactivity: Reacts with strong acids yielding toxic gases, including arsine and arsenic trioxide
Incompatible Materials: Strong oxidizers, reducing agents, acids
Decomposition: Under fire or heating, produces arsenic oxides which pose severe inhalation hazards
Short-Term Exposure: Immediate symptoms after ingestion, skin absorption, or inhalation may include gastrointestinal distress, weakness, or confusion
Long-Term Exposure: Can cause peripheral neuropathy, skin and lung cancer, cardiovascular disease, diabetes, and reproductive harm
Absorption: Rapid entry through gastrointestinal tract, slower but still significant absorption through the skin
Carcinogenicity: Classified as carcinogenic to humans by major health agencies
Environmental Magnification: Bioaccumulates in plants and animals, contributing to broader health impacts throughout ecosystems
Fate in Environment: Soluble forms allow for high mobility in soils and water, persistence can last years
Aquatic Risk: Acutely toxic to fish, invertebrates, and plant life, disrupts food webs
Tendency to Accumulate: Bioaccumulation leads to increased arsenic levels in food chains, impacting bird and mammal populations
Impact on Soil: Persistent contamination can inhibit soil microbes, reduce crop productivity, and threaten food safety
Waste Management: Dispose of via licensed hazardous waste contractors, never in regular landfill or down the drain
Recycling: Not recommended as the toxic risk outweighs recovery value for almost all users
Container Handling: Decontaminate drums or other containers before reuse or disposal, clearly label hazardous waste
Community Risk: Unregulated disposal presents public health threats, especially in agricultural or industrial districts relying on groundwater
Shipping Regulations: Listed as a toxic substance by land, air, and sea authorities, classified as dangerous goods
Packing Requirements: Secure, sealed containers, secondary containment required to prevent leaks
Labeling: Prominent toxic and environmental hazard warnings mandated
Incident Management: Spills during transit trigger mandatory emergency procedures, with notification to environmental protection agencies
Workplace Limits: Very low permissible exposure levels set by OSHA, ACGIH, and global agencies due to high toxicity
Environmental Laws: Listed as a priority pollutant under the Clean Water Act in the United States, subject to stringent reporting, monitoring, and remediation demands
Sale and Use: Severely restricted in most countries, bans or strict controls for agriculture and residential uses
Health Protection: Laws require immediate reporting of large releases, occupational exposure, and medical surveillance in workplaces managing arsenic compounds
Record-Keeping: Strict documentation of inventory, usage, and disposal, with periodic audits
