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Product Name: Sodium Chlorite Solution
Common Names: Chlorous acid, sodium salt solution
Recommended Uses: Water treatment, disinfectant, bleaching agent
Supplier Information: Manufacturer’s name, emergency contact number, and address provided on original shipping label
CAS Number: 7758-19-2
UN Number: UN 1908
Emergency Guide Number: Refer to response center
Synonyms: Sodium Chlorite aqueous solution, NaClO2 in water
Hazard Class: Oxidizing Liquids, Category 2; Acute Toxicity (Oral), Category 4; Skin Corrosion/Irritation, Category 1B; Serious Eye Damage/Irritation, Category 1
Signal Word: Danger
Hazard Statements: Strong oxidizer; may cause fire or explosion; harmful if swallowed, severe burns to skin and eyes, may irritate respiratory passages
Pictograms: Flame over circle, exclamation mark, corrosion
Precautionary Statements: Keep away from heat, sparks, and combustible materials; avoid breathing mist or vapors; wear proper protective gear; wash hands thoroughly after handling; use only in well-ventilated areas
Ingredient: Sodium Chlorite
Chemical Formula: NaClO2
Concentration: Chlorine content greater than 5%
Other Components: Water (solvent), low levels of byproducts such as sodium chloride or sodium chlorate may be present
Impurities: Trace impurities typical of manufacturing process, usually less than 1%
Inhalation: Move affected person to fresh air immediately, keep calm, administer oxygen if breathing becomes difficult, call emergency services at once
Skin Contact: Remove contaminated clothing and rinse skin with plenty of water for at least 15 minutes, seek medical attention even if symptoms do not appear immediately
Eye Contact: Rinse eyes cautiously with lukewarm water for at least 15 minutes, hold eyelids open, continue flushing until medical personnel arrive
Ingestion: Do not induce vomiting, rinse mouth with water, drink plenty of water if conscious, get medical help without delay
Potential Symptoms: Redness, pain, burns, irritation to mucous membranes, coughing, shortness of breath, nausea
Extinguishing Media: Use water spray, fog, or foam – do not use dry chemical extinguishers or carbon dioxide on this oxidizer
Special Hazards: Solution intensifies fire if involved in a blaze; may release toxic gases such as chlorine and oxides of sodium
Protective Equipment: Firefighters must wear self-contained breathing apparatus and full protective gear
Fire-Fighting Instructions: Cool containers exposed to flames with water, avoid inhaling fumes, fight fire from maximum distance, prevent runoff from entering drains
Explosion Risk: Rapid pressure build-up may cause container rupture in strong fire conditions
Personal Precautions: Evacuate unprotected people, avoid all contact, ventilate area, use appropriate PPE including gloves, goggles, and chemical resistant suit
Environmental Precautions: Prevent entry into waterways, soil, or sewers; contain the spill with inert, non-combustible absorbent materials such as sand
Spill Cleanup: Neutralize with reducing agent like sodium thiosulfate if safe, collect and isolate spilled material in labeled containers for disposal by certified waste contractor
Reporting: Report significant releases to emergency authorities as required by local regulations
Handling: Handle only in well-ventilated areas, keep away from organic materials, acids, metals, and sources of ignition, never return unused solution to original container, avoid friction, heat, and shock
Storage: Store tightly closed in corrosion-resistant containers, segregate from acids, reducing agents, combustibles, flammable materials, and direct sunlight, maintain temperature below 30°C, post clear hazard signage, ensure secondary containment
Incompatibilities: Strong acids, strong bases, organic materials, reducing agents, powdered metals
Special Considerations: Always open containers slowly to relieve pressure, inspect containers frequently for signs of corrosion or leaks
Control Parameters: No established OSHA PEL or ACGIH TLV for sodium chlorite, but minimize exposure as much as possible
Engineering Controls: Local exhaust ventilation, closed system operations, eye-wash stations, and emergency showers
Personal Protective Equipment: Chemical-resistant gloves (such as neoprene or nitrile), splash-proof goggles or face shield, long-sleeved chemical-resistant clothing, rubber boots
Respiratory Protection: Approved respirator suitable for chlorine or particulates if occupational exposure limits risk being exceeded
Hygiene Practices: Remove and wash contaminated clothing before reuse, wash hands and face thoroughly before eating, drinking, or smoking
Appearance: Clear to pale yellow liquid
Odor: Slight chlorine-like odor
pH: Alkaline, typically 11–13
Melting/Freezing Point: Not applicable (aqueous solution)
Boiling Point: Approximately 100°C (212°F)
Solubility in Water: Complete
Density: 1.15–1.25 g/cm3 (varies by concentration)
Vapor Pressure: Not significant at room temperature
Decomposition Temperature: Decomposes above 180°C
Other Properties: Strong oxidizer, non-flammable, can accelerate burning in contact with combustible materials
Chemical Stability: Stable under recommended conditions, may slowly decompose over time especially if exposed to heat, light, or contamination
Hazardous Reactions: Contact with acids releases toxic chlorine dioxide gas, reacts strongly with reducing agents and organic materials
Incompatible Materials: Acids, reducing substances, organic matter, combustible materials, ammonia, and most metals
Hazardous Decomposition Products: Chlorine dioxide, chlorine gas, sodium chloride, sodium chlorate
Conditions to Avoid: Elevated temperature, exposed sunlight, contamination by foreign materials
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Effects: Corrosive, causes severe skin and eye burns, respiratory irritation, gastrointestinal damage if swallowed
Chronic Effects: Long-term exposure can lead to anemia, methemoglobinemia, effects on thyroid function
LD50 (oral, rat): About 350 mg/kg for sodium chlorite
Potential Symptoms: Nausea, vomiting, abdominal pain, cough, difficulty breathing, vision problems
Carcinogenicity: Not listed as carcinogen by IARC, NTP, OSHA, or ACGIH
Other Health Effects: Prolonged or repeated exposure may aggravate pre-existing skin, liver, or blood conditions
Ecotoxicity: Harmful to aquatic organisms, may cause long-term adverse effects in aquatic environments, strong oxidizer increases chemical oxygen demand
Persistence and Degradability: Sodium chlorite degrades relatively quickly in the environment under sunlight but can persist under certain conditions
Bioaccumulation Potential: Low due to rapid breakdown and low partition coefficient
Mobility in Soil: Expected to have high mobility in soil and water due to solubility
Other Effects: Release to surface waters may cause fish kills and disrupt aquatic microbial activity required for ecosystem balance
Waste Disposal Methods: Dispose of through licensed chemical waste disposal contractor, solution must never be poured down the drain or into natural waters
Contaminated Packaging: Rinse containers with reducing solution (such as sodium thiosulfate), offer for recycling or disposal as hazardous waste
Special Precautions: Separate from combustibles and acids during disposal, comply with all federal, state, and local waste disposal regulations, document all handling and transfer operations
UN Number: UN 1908
Shipping Name: Sodium chlorite solution
Transport Hazard Class: 5.1 (Oxidizer)
Packing Group: II
Marine Pollutant: Regulated as hazardous to the aquatic environment under IMDG
Labels Required: Oxidizer, corrosive
Special Transport Precautions: Avoid vibration and shock, segregate from all foodstuffs, acids, combustibles in transit, emergency response guidance available from shipping papers
Regulatory Status: Subject to OSHA Hazard Communication Standard; covered by SARA Title III Sections 311/312 (Acute Health Hazard, Fire Hazard); listed in TSCA Inventory
EPA Regulations: Classified as hazardous waste under RCRA regulations when disposed (D001 Oxidizer); reportable quantity for accidental releases determined by local jurisdiction, consult latest EPA rules
International Regulations: Regulated by European REACH, CLP Regulation, and subject to transport rules under ADR, IMDG, and IATA
Label Requirements: Product label must include hazard symbols, signal word “Danger,” hazard statements, precautionary statements, supplier ID, and correct chemical identity
Other Rules: Workplace use governed by relevant worker safety laws and chemical hygiene plans. All handlers must be trained in proper response and spill management procedures.
