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Potassium Metabisulphite Food Grade
Potassium Metabisulphite Food Grade is a white crystalline powder with strong antioxidant and preservative properties. It is widely used in the food and beverage industry as a disinfectant, antioxidant, and preservative to prevent spoilage and microbial growth. It also acts as a bleaching agent and sulfur dioxide (SO₂) source. This compound is critical in winemaking, brewing, and food processing to maintain product quality and extend shelf life.
Potassium Metabisulphite Food Grade
Primary Uses
- Food and Beverage Industry
- Used as a preservative and antioxidant in wine, beer, fruit juices, and soft drinks to prevent oxidation and microbial contamination.
- Acts as a sanitizer and disinfectant for equipment and surfaces in food processing facilities.
- Employed in dried fruits and vegetables to preserve color and prevent enzymatic browning.
- Used in baking powder as a dough conditioner and to control yeast growth.
- Winemaking and Brewing
- Serves as a sterilizing agent to inhibit wild yeast and bacteria during fermentation and storage.
- Prevents oxidation and spoilage in wine and beer production, maintaining flavor and aroma integrity.
Secondary Uses
- Pharmaceuticals
- Used as a reducing agent and preservative in certain pharmaceutical formulations.
- Water Treatment
- Applied to remove excess chlorine and disinfect water in small-scale water treatment.
- Cosmetics
- Utilized in low concentrations as an antioxidant and preservative in cosmetic products.
- Chemical Industry
- Used as a sulfur dioxide donor in chemical synthesis and as a bleaching agent.
1. Basic Identification Attributes
- Chemical Name (IUPAC): Potassium metabisulphite
- Common/Trade Name: Potassium Metabisulphite Food Grade
- CAS Number: 16731-55-8
- HS Code: 2833.29
- Synonyms: Potassium pyrosulfite; E224; dipotassium disulfite
2. Physical & Chemical Properties
- Physical State: White crystalline powder
- Color & Odor: White; sulfur dioxide odor when dissolved
- Solubility: Soluble in water, releasing SO₂ gas
- Melting Point: Decomposes at approximately 150°C
- Density: ~2.19 g/cm³
- Stability: Stable when dry; releases SO₂ on contact with moisture
3. Safety & Hazard Attributes
- GHS Classification: Harmful if swallowed; respiratory irritant; may cause allergic reactions
- Toxicity: Moderate; avoid inhalation and ingestion
- Exposure Limits: Follow occupational exposure limits; use respiratory protection if necessary
4. Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry, well-ventilated area, away from moisture and acids
- Container Type: Sealed plastic or metal containers
- Shelf Life: Typically 1–2 years if stored properly
- Handling Precautions: Use gloves, masks, and eye protection; avoid dust inhalation
5. Regulatory & Compliance Attributes
- Approved as a food additive (E224) by FDA, EFSA, and other regulatory bodies
- Complies with food safety and quality standards
6. Environmental & Health Impact
- Biodegradability: Breaks down to sulfur compounds; environmentally degradable
- Ecotoxicity: Toxic to aquatic life at high concentrations
- Bioaccumulation: Not significant
Safety Handling Precautions
- PPE Required: Gloves, goggles, and dust mask recommended
- Handling Guidelines: Avoid inhalation of dust and contact with skin or eyes
- Storage Measures: Keep containers tightly closed and dry
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if respiratory irritation persists
- Skin Contact: Wash with plenty of water; seek medical help if irritation develops
- Eye Contact: Rinse with water for at least 15 minutes; seek immediate medical attention
- Ingestion: Rinse mouth; do not induce vomiting; seek urgent medical assistance
Firefighting Measures
- Fire Hazards: Non-flammable but releases toxic sulfur dioxide gas when heated
- Extinguishing Media: Use water spray, foam, or dry chemical extinguishers
- Special Precautions: Firefighters must wear protective gear and self-contained breathing apparatus
- Hazardous Combustion Products: Sulfur oxides (SOx)
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