Sodium Dithionite
Sodium Dithionite (Na2S2O4, CAS 7775-14-6) is a powerful reducing agent widely utilized in various industrial processes, notably in textile dyeing and pulp and paper bleaching.
Description
Sodium Dithionite, with the chemical formula Na2S2O4 and CAS Registry Number 7775-14-6, is an inorganic compound known for its potent reducing capabilities. It is typically supplied as a white to pale yellow crystalline powder. This compound is highly soluble in water, forming solutions that readily undergo hydrolytic decomposition, particularly at elevated temperatures or in acidic conditions, releasing sulfur dioxide. Its reducing power is primarily attributed to its ability to donate electrons, converting various oxidized species into their reduced forms. This characteristic makes it indispensable in processes requiring strong redox reactions. Sodium dithionite is relatively unstable in air, especially when moist, as it can oxidize to sodium bisulfite and sodium thiosulfate. Proper storage and handling are crucial to maintain its efficacy and prevent decomposition. The compound can act as a radical initiator under certain conditions and is also known by the trivial name sodium hydrosulfite.
Applications
Sodium dithionite is extensively employed in the textile industry as a reducing agent for vat dyes and sulfur dyes, facilitating their homogeneous application to fabrics. In the pulp and paper industry, it serves as a crucial bleaching agent, effectively removing lignin and other chromophoric compounds to enhance paper brightness without damaging cellulose fibers. It is also utilized in the photographic industry as a developing agent. Other applications include its use in wastewater treatment for chromium reduction, in the food industry as a preservative and antioxidant, and in the synthesis of organic chemicals. Its versatility stems from its strong reducing potential across a range of industrial settings.
Storage & Handling
Store in a cool, dry, well-ventilated area, away from incompatible materials, moisture, and heat sources. Keep container tightly closed. Avoid contact with acids, oxidizers, and heavy metals. Handle with dry tools. Protect from direct sunlight.
Danger
- H225 Highly flammable liquid
Documents & attachments
No documents attached yet.