Sodium Metabisulfite (CAS 7681-57-4) – Strong Preservative and Antioxidant

🧪 CAS Number: 7681-57-4

🌟 Product Description

Sodium metabisulfite is a white to yellowish crystalline powder, highly soluble in water. With strong reducing and antimicrobial properties, it is widely used in food, water treatment, textiles, and chemical industries.

🏭 Applications

🍷 Preservative in wine and juices

🍤 Antioxidant in food industry

💧 Water treatment chemical

👕 Textile bleaching processes

⚗️ Reagent in chemical synthesis

📊 Physical & Chemical Properties

Appearance: White/yellowish crystalline powder

Odor: Sulfurous, pungent

Formula: Na2S2O5

Molecular Weight: 190.11 g/mol

Density: ~1.48 g/cm³

Solubility: Soluble in water

pH (1% solution): ~4.5

⚠️ Storage & Safety

Store in cool, dry, and ventilated areas. Avoid contact with acids and moisture. May cause irritation to skin and eyes; use protective equipment.

🔑 Keywords

sodium metabisulfite, CAS 7681-57-4, preservative, food additive, antioxidant, water treatment

📛 Other Names

Sodium Pyrosulfite, Disodium Disulfite