Potassium Metabisulphite Food Grade

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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.

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Categories: Excipients, FOOD AND BEVERAGE CHEMICALS, PHARMACEUTICAL CHEMICALS, Preservatives(food) Tags: Antioxidant Agent, Food Preservative, Potassium Metabisulphite, Sulfite Compound, White crystalline powder

Description

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.

PRODUCT KEY FEATURES

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

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

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

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

Regulatory & Compliance Attributes

Approved as a food additive (E224) by FDA, EFSA, and other regulatory bodies
Complies with food safety and quality standards

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

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)