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.
Post time: Mar-07-2025