Sodium Bisulfite 35–38% (CAS 7631-90-5) – Powerful Reducing and Preserving Agent

🧪 CAS Number: 7631-90-5

🌟 Product Description

Sodium bisulfite 35–38% is a clear, colorless to slightly yellow liquid with a pungent sulfurous odor. Known for its strong reducing properties, it is widely used in food preservation, water treatment, textiles, pulp and paper, and as an intermediate in the chemical industry.

🏭 Applications

🥫 Preservative and antioxidant in food

💧 Oxygen scavenger in water treatment

👕 Bleaching and auxiliary in textiles

📄 Process chemical in pulp and paper

🧪 Intermediate in chemical industry

📊 Physical & Chemical Properties

Appearance: Colorless to slightly yellow liquid

Odor: Pungent, sulfurous

Formula: NaHSO3

Molecular Weight: 104.06 g/mol

Concentration: 35–38%

Density (20 °C): ~1.3 g/cm³

Solubility: Completely soluble in water

⚠️ Storage & Safety

Store in a cool, dry, and well-ventilated place. Contact with acids may release harmful gases. Avoid skin and eye contact; protective equipment is required.

🔑 Keywords

sodium bisulfite, CAS 7631-90-5, reducing agent, preservative, oxygen scavenger, food additive

📛 Other Names

Sodium Hydrogen Sulfite, NaHSO3