Product Overview & Quality

Product Name: Potassium metabisulfite (Potassium pyrosulfite)
Grade: Analytical Reagent (AR Grade), optimized for high-purity laboratory standards and precise chemical reactions.
Purity (Assay): Not less than 96%
Physical Properties: White crystalline powder with a strong, pungent sulfurous odor.
Key Features: Acts as a potent antioxidant and antimicrobial agent by releasing sulfur dioxide ($SO_2$) in aqueous or acidic environments.

Safety & Hazards

Classification: Classified as an irritant; causes serious eye damage.
Critical Danger: Do NOT mix with acids. Contact with acids releases toxic and corrosive sulfur dioxide gas.
Health Risks: Inhalation may trigger severe allergic reactions or asthma attacks in sulfite-sensitive individuals. Direct contact causes skin and eye irritation.
First Aid Measures: Flush affected eyes with plenty of water for at least 15 minutes. Move to fresh air immediately if gas or dust is inhaled.

Handling & Storage

Storage: Must be kept in a tightly sealed, airtight container. The substance is prone to oxidation when exposed to air and moisture, leading to the formation of potassium sulfate. Store in a cool, dry place.
Precautions: Wear standard PPE, including chemical-resistant gloves and safety goggles. Store strictly away from acids and strong oxidizing agents.