Sulphur Dioxide (Sulfurous Acid)

Product Description

Sulphur Dioxide (SO₂) is a colorless gas with a sharp, suffocating odor, widely used in laboratories, industry, and food processing. When dissolved in water, it forms Sulfurous Acid (H₂SO₃), a mild reducing agent and preservative solution.

In laboratory environments, Sulphur Dioxide and its aqueous form (Sulfurous Acid) are used in analytical chemistry, as a reducing agent, and in sample preparation. Industrially, it is applied in bleaching, water treatment, food preservation, and chemical synthesis. Its dual role as a disinfectant and antioxidant makes it valuable across multiple sectors.

Key Features

• Chemical Name: Sulphur Dioxide / Sulfurous Acid (aqueous solution)
• Chemical Formula: SO₂ (gas), H₂SO₃ (in solution)
• Molecular Weight: 64.07 g/mol (SO₂)
• CAS Number: 7446-09-5 (SO₂), 7782-99-2 (H₂SO₃)
• Appearance:
  • Gas: Colorless with sharp pungent odor
  • Solution: Clear, colorless liquid
• Odor: Strong, choking odor
• Solubility: Highly soluble in water; forms sulfurous acid solution
• Purity: ≥99% (Gas) / Standard concentrations in solution form
• Melting Point (SO₂): -72.7°C
• Boiling Point (SO₂): -10°C

Applications

Laboratory & Research

• Used as a reducing agent in analytical chemistry.
• Applied in iodometric titrations and chlorine analysis.
• Serves as a preservative for chemical and biological samples.

Industrial Uses

• Food Industry: Acts as a preservative and antioxidant in dried fruits, juices, and beverages.
• Water Treatment: Used for dechlorination and removal of excess chlorine.
• Textile & Paper Industry: Employed as a bleaching agent.
• Chemical Industry: Intermediate for sulfuric acid, sodium bisulfite, and other sulfur compounds.
• Pharmaceuticals: Used in specific synthesis processes and as a stabilizer.

Safety & Handling

• Hazard: Toxic and corrosive; can cause respiratory irritation, eye and skin burns.
• Precautions: Handle with proper ventilation, protective gloves, goggles, and chemical-resistant clothing. Use gas detectors where necessary.
• Storage: Store cylinders upright in a cool, dry, well-ventilated area, away from oxidizers and heat sources. Aqueous solution should be stored in tightly sealed containers.
• Disposal: Follow local hazardous waste disposal regulations for gases and acidic solutions.

Why Choose Sulphur Dioxide / Sulfurous Acid from M/S Bright Scientific Co.?

• High-purity Sulphur Dioxide gas and standardized Sulfurous Acid solution available.
• Suitable for both laboratory and industrial-grade applications.
• Reliable quality with strict purity control.
• Nationwide supply with competitive pricing in Bangladesh.
• Trusted by chemical, food, and water treatment industries.

Price in Bangladesh

Available in gas cylinders and aqueous solution (various concentrations):

• Cylinders: Standard SO₂ gas supply
• Solutions: 500 mL, 1 L, 5 L, and 25 L packs
  Bulk pricing available for food industries, laboratories, and chemical plants.

Contact Information

M/S Bright Scientific Co.
📞 Phone: 01711285976