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Product Name: Potassium Bisulfite
Synonyms: Potassium hydrogen sulfite, E228
Chemical Formula: KHSO3
Manufacturer: Major global chemical producers, typically packaged for laboratory, food, and industrial use
Recommended Use: Food preservative, wine and beverage antioxidant, industrial sterilizing agent
Emergency Contact: National chemistry safety hotlines, local poison control centers
Classification: Skin and eye irritant, respiratory irritant, hazardous in case of ingestion or inhalation
GHS Classification: Acute Toxicity (Oral) Category 4, Skin Irritant Category 2, Eye Irritant Category 2A
Label Elements: Exclamation mark (Warning), keep away from incompatible substances
Hazard Statements: Harmful if swallowed, causes skin and serious eye irritation, may cause respiratory irritation
Precautionary Statements: Wear protective equipment, avoid breathing dust or fumes, handle in well-ventilated areas
Chemical Name: Potassium bisulfite
CAS Number: 7773-03-7
EC Number: 231-870-1
Approximate Purity: 98 - 100%
Impurities: May include minor amounts of potassium sulfite, moisture content depending on storage
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes, remove contact lenses if present, seek medical attention
Skin Contact: Wash thoroughly with soap and water, remove contaminated clothing, consult a doctor if irritation persists
Inhalation: Move person to fresh air, monitor for signs of respiratory difficulty, get medical help if breathing becomes difficult
Ingestion: Rinse mouth, do not induce vomiting, give water to drink unless victim is unconscious, call poison control or physician promptly
Note for Physicians: Treat symptomatically, be aware of possible delayed pulmonary effects, monitor for allergic or asthmatic reactions
Suitable Extinguishing Media: Water spray, dry chemical, CO2, or foam
Specific Hazards: Product may release sulfur oxides (SO2) and potassium oxides in case of fire
Protective Equipment: Wear self-contained breathing apparatus and protective suit
Special Procedures: Move containers from fire area if safe, cool containers with water fog
Personal Precautions: Wear suitable respiratory protection, gloves, and goggles
Spill Response: Avoid dust formation, ventilate area, keep unauthorized personnel away
Clean-up Procedures: Sweep or shovel up material for recovery or disposal, avoid dry sweeping to reduce dust
Environmental Precautions: Prevent material from entering drains or waterways, contain spilled material with earth or sand
Handling: Minimize dust generation and accumulation, use only in well-ventilated areas, wash hands and face after use, do not eat, drink, or smoke while handling
Storage: Store in a tightly sealed container, keep in a cool, dry, and well-ventilated place, prevent exposure to moisture and incompatible materials such as acids and oxidizers
Storage Temperature: Stable at ambient temperatures and away from direct sunlight
Packaging Materials: Store in corrosion-resistant containers with secondary containment recommended
Occupational Exposure Limits: No established OSHA PEL, local exposure limits for sulfur dioxide may apply
Engineering Controls: Use local exhaust ventilation or other engineering controls to keep airborne levels below recommended exposure limits
Personal Protective Equipment: Wear chemical-resistant gloves, safety goggles, lab coats or protective clothing, and respiratory protection as necessary to control exposure levels
Hygiene Measures: Wash thoroughly after handling, avoid contact with eyes and skin, do not inhale dust or fumes
Appearance: White to off-white crystalline powder
Odor: Slight sulfurous odor
Melting Point: Decomposes before melting at about 190°C
Solubility: Soluble in water, forms acidic solutions
pH: 3.2 - 4.0 for a 10% solution
Vapor Pressure: Negligible at room temperature
Density: Around 2.34 g/cm3
Boiling Point: Not applicable (decomposes)
Other Properties: Releases sulfur dioxide gas if heated strongly or mixed with acids
Chemical Stability: Stable under recommended storage and handling conditions
Incompatible Materials: Strong acids, oxidizing agents, water (reacts slowly to release SO2)
Hazardous Decomposition: Sulfur dioxide (SO2), potassium oxide at high temperatures
Polymerization: Will not occur
Routes of Exposure: Inhalation, ingestion, skin, and eye contact
Acute Effects: May cause eye and skin irritation, respiratory tract irritation, coughing, difficulty breathing
Chronic Effects: Asthma, bronchial irritation, long-term skin contact may cause dermatitis
Toxicity Data: Acute oral LD50 for rats 2000 mg/kg; exposure limits driven by sulfur dioxide regulatory guidelines
Other Health Information: Sensitive individuals (especially asthmatics) may experience stronger reactions; can lead to allergic responses
Ecotoxicity: Can be toxic to aquatic life due to acidic pH and sulfite release
Persistence and Degradability: Breaks down to potassium and sulfate in the environment under normal conditions
Bioaccumulation: Unlikely, as potassium bisulfite rapidly dissociates in water
Mobility in Soil: High, as it is highly water-soluble and mobile in aqueous systems
Other Adverse Effects: Spills may reduce oxygen in water bodies, potentially causing fish kills
Waste Disposal: Follow all local, regional, and national regulations for hazardous waste, neutralize solutions with alkaline agents and dilute before disposal
Unused Product: Deliver to licensed waste management company, do not landfill large quantities
Contaminated Packaging: Rinse with water, manage as hazardous waste if contamination present, recycle containers where possible following decontamination
UN Number: 2693
Proper Shipping Name: Potassium bisulfite
Hazard Class: 8 (corrosive substances)
Packing Group: III
Transport Labels: Corrosive, avoid transport with incompatible materials
Special Precautions: Protect from moisture, use leak-proof packaging, secure containers during shipment
EU Classification: Listed under Regulation (EC) No 1272/2008 (CLP Regulation), subject to chemical safety assessments
US Regulations: TSCA listed, regulated by OSHA and EPA for workplace and environmental exposure
Labeling Requirements: GHS hazard pictograms, Signal word: Warning
Other Legal Requirements: Subject to reporting under SARA Title III; local and national regulations may set additional restrictions, especially for food and water use
