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Common Name: Sodium Chlorate
Chemical Formula: NaClO3
Physical Form: Usually found as a white, odorless crystalline powder, sometimes in granules
Usage: Mostly used as a herbicide, in paper bleaching, and for certain chemical manufacturing tasks
Recognition: Dissolves well in water, distinctive due to its strong oxidizing capabilities
Molecular Weight: 106.44 g/mol
Major Risks: Strong oxidizer, increases fire risk if mixed with organic materials
Exposure Paths: Inhalation, ingestion, skin, and eye contact
Health Risks: Can cause severe irritation to eyes, skin, respiratory tract, and if swallowed, leads to harmful effects like gastrointestinal upset or even methemoglobinemia in high doses
Physical Risks: Powder can be airborne, increasing inhalation chance
Environmental Harm: Aquatic toxicity reported, affecting fish and plant life downstream of discharge points
Sensitivity: Enhances risk in the presence of heat, friction, or impurities
Main Content: Sodium chlorate, purity usually above 99% in technical grades
Impurities: Small levels of sodium chloride, sodium sulfate, and moisture sometimes present
Hazardous Components: No intentionally added hazardous derivatives outside the main oxidizer itself
Inhalation: Remove to fresh air, seek immediate medical attention if breathing becomes difficult, supportive care may be needed
Skin Contact: Rinse thoroughly with water, remove contaminated clothing, soap and water for residual powder, risk of chemical burns in sensitive people
Eye Contact: Immediate irrigation for at least 15 minutes, lifting eyelids, do not rub, medical attention required for irritation or vision changes
Ingestion: Rinse mouth, never give fluids or induce vomiting to an unconscious person, hospital attention crucial due to potential for internal burns and systemic toxicity
General Note: Sodium chlorate does not itself burn, but supports and accelerates combustion of organic or flammable matter
Suitable Extinguishing Media: Use water in large amounts, do not use foam or dry chemical for bulk fires; risk that powders act as oxidizers even beyond the fire site
Fire Hazards: Decomposition creates toxic fumes, including chlorine and other irritants
Protective Gear: Full protective suit, self-contained breathing apparatus for personnel
Special Advice: Remove containers from fire area if safe to do so, flood with water to cool
Spill Response: Isolate area, prevent dust spread, sweep up using non-sparking tools, avoid creating dust clouds
Environmental Controls: Prevent runoff into sewage or waterways by creating dikes or absorbent barriers
Cleanup: Place collected material in appropriate chemical waste containers, label clearly for dangerous oxidizing contents
Personal Safety: Use nitrile or rubber gloves, goggles, dust mask or respirator, long sleeves
Reporting: Large spills, particularly to watercourses, need to be reported to environmental authorities
Storage Conditions: Store in cool, dry, well-ventilated locations, keep away from combustible, organic materials, acids, and reducing agents
Separation: Do not store near fuels or materials like wood, paper, cloth
Container Requirements: Use thick plastic drums or lined metal bins, always tightly sealed
Handling Advice: Minimize dust creation, ensure equipment is grounded and spark-proof, never return unused material to original container to prevent contamination and accidental reaction
Personal Behavior: Prohibit eating, drinking, and smoking when handling this chemical
Engineering Controls: Local exhaust ventilation is crucial, use of dust extraction systems in processing areas
PPE: Comfortable but protective, including chemical-resistant gloves, safety goggles, disposable or laundered lab coats, dust mask (N95 or better) if powder management is manual
Respiratory Protection: Respirators mandatory if dust levels rise above recommended exposure limits or if splashing is possible
Work Practice: Wash hands and arms carefully after use, regular health checks for frequent handlers, routine cleaning of workspaces to prevent build-up
Odor: Odorless
Melting Point: About 248°C, decomposition starts near this temperature
Boiling Point: Decomposes on heating without boiling
Solubility: Highly soluble in water, moderate in glycerol, insoluble in most organic solvents
Appearance: White crystals or powder, sometimes slightly moist if not stored well
pH (10% solution): Around neutral, close to pH 7
Reactivity Risks: Very strong oxidizing potential, reacts violently with organic materials, acids, reducing agents, sulfur, phosphorus, powdered metals
Stability: Thermally stable below decomposition temperature, but risk of exothermic breakdown increases quickly at higher temperatures or in presence of contamination
Incompatibilities: Most pronounced with fuels, finely-divided combustibles, acidic vapors
Hazard Decomposition: Creates oxygen gas, chlorine, and toxic metal oxides, which are dangerous even at low concentrations
Acute Effects: Inhalation causes respiratory irritation, shortness of breath; ingestion in moderate amounts brings on abdominal pain, vomiting, diarrhea, more severe exposures lead to methemoglobinemia, kidney failure, or shock
Chronic Effects: Repeated low-level exposure shown to increase risk of anemia, mild nervous system symptoms, animal studies suggest kidney changes
Sensitization: No reliable evidence for allergic sensitization, but irritation is well-documented
Carcinogenicity: Not classified as carcinogenic by major regulatory agencies
Genotoxicity: Some in vitro assays raised concerns, but overall risk remains low for DNA damage based on workplace experience
Aquatic Toxicity: Demonstrated harm to aquatic plants and certain fish even at low concentration; risk comes from both immediate toxicity and long-term buildup
Persistence: Breaks down in soil and water but relatively slowly under low temperatures and oxygen-limited conditions
Mobility: Easily migrates with surface runoff into streams and lakes, thus good containment and handling paramount
Ecosystem Impact: High enough concentrations disrupt photosynthesis in algae, impacting food chains downstream
Regulatory Concern: Many localities place strict limits on release to prevent environmental damage
Preferred Methods: Dissolved material neutralized with reducing agents under controlled conditions, handled by professional waste processors
Do Not: Never dump down drains or into natural waters
Labeling: Mark all disposal containers for oxidizer hazard
Waste Storage: Store waste in cool, dry isolated spot away from combustibles until pick-up
Review: Stay up to date with municipal or national regulations on hazardous waste
Classification: Regulated as an oxidizing solid; many countries list it as a class 5.1 hazardous material
Packing: Strong, moisture-proof containers, no mixing with foodstuffs or organic matter
Transport Team: Only trained staff should handle loading and unloading
Signage: Clear hazard labels and emergency procedure paperwork must travel with each shipment
Route: Avoid routes near waterways where possible, and minimize time in storage or transit
Local Laws: Widely regulated for industrial use, with strict tracking and control in many countries
Workplace Rules: Mandatory hazard communication, clear labeling, written risk assessments required on all sites
Monitoring: Regular safety audits, reports of accidental releases mandatory in many areas
Distribution: Some jurisdictions restrict sale and storage of more than a set quantity to reduce security or misuse concerns
Updates: Laws change as new health or environmental data emerges, so staying informed is a daily reality for those dealing with this chemical
