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Product Name: Calcium Chlorite
Chemical Formula: Ca(ClO)
Synonyms: Chlorous acid calcium salt
Manufacturer: Refer to supplier-specific source
Recommended Use: Water treatment, disinfection, bleaching agent
Emergency Phone Number: Refer to local emergency services
CAS Number: 13780-53-7
Hazard Classification: Oxidizing solid, acute toxicity (oral, dermal, inhalation), skin and eye irritant
Label Elements: Danger symbol, oxidizer icon, health hazard
Signal Word: Danger
Hazard Statements: May intensify fire; oxidizer. Harmful if swallowed, inhaled, or in contact with skin. Causes skin irritation. Causes serious eye irritation.
Precautionary Statements: Wear protective gloves, face protection, avoid breathing dust, wash hands thoroughly, keep away from heat, hot surfaces and spark sources, store locked up.
Chemical Name: Calcium Chlorite
Common Name: Calcium Chlorite
Content (%): 90–100% active ingredient
Impurities: May contain trace calcium chloride, by-product salts
CAS Number: 13780-53-7
Inhalation: Move person outside for fresh air immediately; loosen any restrictive clothing; seek immediate medical attention if symptoms like coughing or shortness of breath persist.
Skin Contact: Remove contaminated clothing right away; wash exposed skin for at least 15 minutes with plenty of water; if irritation develops, get medical attention.
Eye Contact: Rinse eyes under running water for 20 minutes, lift eyelids, remove contact lenses if present, seek immediate medical attention.
Ingestion: Rinse mouth, drink plenty of water, never give anything by mouth to an unconscious person; do not induce vomiting, seek urgent medical assistance.
Extinguishing Media: Water spray, flooding quantities. Avoid dry chemical, foam, or CO2. Do not use halogenated extinguishers.
Hazards: Oxidizer supports combustion, may release toxic chlorine gas on heating.
Protective Equipment: Wear self-contained breathing apparatus, full protective suit.
Advice for Firefighters: Use water from a safe distance to cool containers, avoid inhaling smoke and chemicals, evacuate area if fire becomes uncontrollable.
Personal Precautions: Evacuate non-essential personnel, use personal protective equipment including gloves, goggles, and mask.
Environmental Precautions: Prevent runoff to waterways, soil, and drains.
Spill Clean-Up Methods: Do not dry sweep – dampen with water to prevent dust. Use non-combustible absorbent material, scoop into proper containers for disposal. Ventilate area well.
Handling: Avoid dust formation, do not breathe dust, use in well-ventilated spaces, handle away from ignition or heat sources, wear proper safety equipment.
Storage Conditions: Store in cool, dry, well-ventilated locations, away from combustible materials, acids, reducing agents. Keep containers tightly sealed and labeled.
Special Precautions: Avoid mixing with organic matter, acids, or ammonia. Do not reuse empty containers.
Engineering Controls: Local exhaust ventilation, mechanical general exhaust.
Personal Protective Equipment (PPE): Chemical-resistant gloves, goggles or face shield, lab coat or coveralls, approved respirator if dust is present.
Workplace Exposure Limit: None established specifically for calcium chlorite, control dust below nuisance levels.
Hygiene Measures: Wash hands, face after handling, do not eat or drink in work area, remove contaminated clothing before leaving area.
Appearance: White to pale yellow granular solid
Odor: Slight chlorine-like odor
Odor Threshold: Not available
pH (solution): Approximately 10–11 (1% solution)
Melting Point/Freezing Point: Decomposes before melting
Boiling Point: Not applicable
Flash Point: Not combustible
Solubility in Water: Slightly soluble
Vapor Pressure: Not applicable
Relative Density: Approximately 2.3 g/cm³
Explosive Properties: Not explosive but supports combustion
Other: Oxidizing properties, decomposes in acidic and warm conditions.
Stability: Stable in original packaging when kept dry and cool.
Reactivity: Highly reactive with acids, strong reducing agents, combustible substances.
Hazardous Decomposition: Produces chlorine gas, oxygen, other toxic fumes during thermal decomposition.
Conditions to Avoid: Moisture, heat, sunlight, contact with acids or organic materials.
Incompatible Materials: Acids, ammonium compounds, easily oxidized or combustible substances.
Polymerization: Will not occur.
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Effects: Mucous membrane and respiratory tract irritation, burns, coughing, difficulty breathing, gastrointestinal distress if swallowed.
Chronic Effects: Repeated exposure may lead to skin dermatitis or respiratory sensitization.
Toxicity Data: Oral LD50 (rat): Data not readily available; related chlorite compounds show moderate acute toxicity.
Carcinogenicity: Not classified as a carcinogen by major agencies.
Other Health Effects: Repeated exposure at high levels can damage blood cells and kidney function.
Ecotoxicity: Very toxic to aquatic life, can raise residual chlorine levels in water bodies, may decrease dissolved oxygen.
Mobility: Limited mobility in soils, may leach to groundwater if spilled in large amounts.
Persistence and Degradability: Breaks down in sunlight and with microbial activity but can leave harmful chlorite residues.
Bioaccumulation: No significant potential for bioaccumulation noted.
Other Adverse Effects: Adds to overall chlorine burden in water ecosystems.
Disposal Methods: Dispose of in accordance with local, regional, and national regulations. Do not allow to enter drains or watercourses; neutralize with sodium thiosulfate before disposal if possible.
Waste Packaging: Decontaminate or incinerate containers after triple rinsing; never reuse containers for food or personal use.
Special Considerations: Consult registered hazardous waste professionals for site-specific recommendations.
UN Number: 1479
UN Proper Shipping Name: Oxidizing Solid, n.o.s. (Calcium Chlorite)
Transport Hazard Class: 5.1 (Oxidizer)
Packing Group: II
Environmental Hazards: Marine pollutant
Special Precautions: Avoid transporting with incompatible materials or in a heated environment, use appropriate spill-proof containment.
Workplace Regulations: Subject to local chemical safety and labor regulations
Hazard Communication: Listed as an oxidizer, reporting required for workplace usage above thresholds
Chemical Inventory Listings: Registered in relevant inventories such as REACH (EU), TSCA (US).
Other Regulations: Subject to transport, storage, waste, and environmental safety standards. Seek state or provincial chemical control guidelines for compliance.
