Sodium Metabisulphite: A Versatile Chemical Compound

Sodium metabisulphite (Na₂S₂O₅), also known as sodium pyrosulfite, is a white crystalline powder widely used across industries for its preservative and antioxidant properties. Recognized as E223 in the European Union, this compound plays a crucial role in food preservation, water treatment, and more, despite requiring careful handling due to its reactive nature.

Sodium metabisulphite consists of two sodium ions and a disulfite anion (S₂O₅²⁻). It appears as a white, free-flowing powder with a pungent sulfur dioxide (SO₂) odor. It is highly soluble in water, forming sodium bisulfite (NaHSO₃), and decomposes at 150°C, releasing SO₂ gas. Its acidic solution acts as a strong reducing agent.
Sodium Metabisulphite: A Versatile Chemical Compound

Sodium metabisulphite (Na₂S₂O₅), also known as sodium pyrosulfite, is a white crystalline powder widely used across industries for its preservative and antioxidant properties. Recognized as E223 in the European Union, this compound plays a crucial role in food preservation, water treatment, and more, despite requiring careful handling due to its reactive nature.

Sodium metabisulphite consists of two sodium ions and a disulfite anion (S₂O₅²⁻). It appears as a white, free-flowing powder with a pungent sulfur dioxide (SO₂) odor. It is highly soluble in water, forming sodium bisulfite (NaHSO₃), and decomposes at 150°C, releasing SO₂ gas. Its acidic solution acts as a strong reducing agent.

Applications:

1.Food Industry:
·Preservative in dried fruits, wines, and processed foods to inhibit microbial growth and oxidation.
· Prevents enzymatic browning in vegetables and fruits.
2.Winemaking:
·Sanitizes equipment and stabilizes must by neutralizing unwanted bacteria and yeasts.
3.Water Treatment:
· Neutralizes chlorine and acts as a disinfectant in wastewater systems.
4.Photography: Component of developing solutions to fix images by removing excess silver.
5.Cosmetics:Preservative in creams and hair products to extend shelf life.

Safety and Handling:
·Health Risks: Releases SO₂ when in contact with acids or moisture, posing respiratory hazards. Sulfite-sensitive individuals may experience allergic reactions.
·Protective Measures: Use gloves, goggles, and masks; ensure ventilation. Store away from acids and oxidizers.
· First Aid: Rinse exposed areas with water; seek medical help for inhalation or ingestion.

Weifang Toption Chemical lndustry Co., Ltd. is a professional manufacturer and supplier of Sodium Metabisulphite. We also supply Soda Ash Light, Soda Ash Dense, Calcium Chloride, Barium Chloride Dihydrate, Magnesium Chloride, , Sodium Bicarbonate, Sodium Hydrosulfite, Gel Breaker, etc. Please visit our website www.toptionchem.com for more information. If you have any requirement, please do not hesitate to contact us.