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Product name: Calcium Bisulfite
Chemical Formula: Ca(HSO3)2
Common Names: Calcium Hydrogen Sulfite, Calcium Acid Sulfite
Manufacturer Details: Contact sourcing department for supplier names, location, and emergency phone
Uses: Water treatment, pulp and paper processing, food preservative, reducing agent
Hazard Class: Acute toxicity (oral, inhalation), corrosive to eyes and skin
Hazard Statements: Harmful if swallowed or inhaled, causes serious eye damage, causes skin burns, may release irritating sulfur oxides
GHS Pictograms: Corrosive, Exclamation mark
Signal Word: Danger
Precautionary Statements: Avoid breathing dust or mist, wear protective gloves, wash hands thoroughly after handling, do not eat, drink, or smoke while using
Chemical Name: Calcium Bisulfite
CAS Number: 13780-03-5
EC Number: 237-434-8
Concentration: 100% for neat material, industrial mixtures may contain 58–62% by weight
Impurities: Trace calcium sulfate, water, and calcium carbonate from process impurities
Inhalation: Move to fresh air immediately, seek medical attention if breathing problems develop or persist
Skin Contact: Rinse skin thoroughly with water for 15 minutes, remove contaminated clothing, seek medical attention if burns or irritation develops
Eye Contact: Remove contact lenses, flush eyes with plenty of water for at least 15 minutes, keep eyelids open, consult a physician promptly
Ingestion: Rinse mouth, do not induce vomiting, seek immediate medical attention, give water if victim is conscious and able to swallow
Most Important Symptoms: Burning sensation, cough, wheezing, risk of delayed severe respiratory symptoms
Flammability: Not combustible but may release sulfur oxides on heating
Suitable Extinguishing Media: Use water spray, foam, carbon dioxide, or dry chemical for surrounding fire
Special Hazards: Forms toxic and irritating sulfur dioxide and other sulfur oxides in a fire
Protective Gear: Full protective clothing, self-contained breathing apparatus for firefighters
Firefighting Instructions: Move containers from fire area if safe to do, cool exposed containers with water spray
Personal Precautions: Avoid dust formation, ventilate area, evacuate unnecessary personnel, use recommended personal protective equipment
Environmental Precautions: Prevent chemical from entering drains, sewers, or waterways
Cleanup Methods: Use inert absorbent such as sand, collect spills in suitable non-metallic containers, neutralize with lime or soda ash if necessary
Disposal: Dispose of waste in compliance with local, regional, and national regulations
Decontamination: Wash spill area with water after cleanup, ventilate area
Handling: Keep containers tightly closed, work in well-ventilated areas, avoid inhalation and contact with skin or eyes, use non-sparking tools, handle away from incompatible materials like acids, alkalis, oxidizers
Storage: Store in cool, dry place, separate from food and incompatible materials, keep away from direct sunlight, use corrosion-resistant containers
Hygiene: Wash hands and face before eating, drinking, or smoking, remove contaminated clothing and wash before reuse
Workplace Exposure Limit: No specific limits for calcium bisulfite; nuisance dust limit applies (10 mg/m³ total dust, 3 mg/m³ respirable fraction ACGIH)
Engineering Controls: Use local exhaust ventilation, maintain adequate general ventilation
Respiratory Protection: Use approved respirators if ventilation inadequate or during large spills
Eye Protection: Chemical splash goggles or face shield
Skin Protection: Impervious gloves, long-sleeved clothing, chemical-resistant boots
Other Protection: Emergency eyewash and safety shower in work area
Appearance: White-grayish crystalline solid or solution based on preparation
Odor: Faint sulfurous odor
Odor threshold: Not established
pH: 4–5 (10% solution)
Melting Point/Range: Decomposes before melting
Boiling Point: Not applicable
Flash Point: Not relevant (not flammable)
Evaporation Rate: Not applicable
Flammability: Not flammable
Vapor Pressure: Negligible at room temperature
Solubility: Very soluble in water, forms acidic solutions
Density: 2.4 g/cm³ (solid)
Partition Coefficient: Not available
Autoignition Temperature: Not available
Decomposition Temperature: Decomposes to calcium sulfate, sulfur dioxide on heating
Chemical Stability: Stable in cool, dry, well-sealed containers
Reactivity: Reacts vigorously with acids, oxidizers, releases sulfur dioxide on contact with strong acids or during heating
Incompatibilities: Strong acids, bases, oxidizing agents, alkaline substances
Hazardous Decomposition: Sulfur dioxide, sulfur trioxide, calcium oxide
Polymerization: Will not occur
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Effects: Burn and irritation on skin and mucous membrane, nausea, vomiting, headache on ingestion, respiratory symptoms on inhalation
Chronic Effects: Prolonged exposure may cause dermatitis, asthma, or skin sensitization
LD50 (oral, rat): Estimated above 2000 mg/kg
Carcinogenicity: Not listed as carcinogen by IARC, NTP, or OSHA
Reproductive Effects: No data on reproductive toxicity
Aquatic Toxicity: Toxic to aquatic organisms in concentrated form
Persistence/Degradability: Biodegradable via oxidation to sulfate; persists in anaerobic or low-oxygen conditions
Bioaccumulation: Potential for bioaccumulation low
Mobility: Highly soluble in water; may impact aquatic environments through pH shift and oxygen depletion
Environmental Fate: Forms calcium sulfate and oxidized sulfur species in contact with air
Waste Treatment: Neutralize before disposal, consult local regulations
Disposal Method: Dispose via licensed waste management contractor, incineration or landfill for neutralized solids
Packaging: Dispose packaging as hazardous waste unless fully cleaned and decontaminated
Special Precautions: Prevent run-off from contaminating soil, water, or drains
UN Number: Not classified as dangerous for transport under UN, ADR, IMDG or IATA
Proper Shipping Name: Calcium Bisulfite
Hazard Class: Not regulated
Packing Group: Not assigned
Transport Hazard: Product packed in vented containers due to SO2 off-gassing; avoid transport with acids, oxidizers
Safety, Health, Environmental Regulations: Listed in TSCA inventory (USA), EINECS (EU), DSL (Canada)
Labeling Requirements: GHS/OSHA hazard labels, workplace chemical lists
Restrictions: Controlled under water treatment chemical guidelines, food additive use restricted and closely regulated
Risk Phrases: R22 Harmful if swallowed, R34 Causes burns
SARA Title III: Not listed as hazardous substance, but reporting may be triggered by sulfur dioxide release
