Sodium Hydrosulphite (88%) - China

Brief Overview Sodium hydrosulphite, also known as sodium dithionite, is a white crystalline powder with the chemical formula Naâ‚‚Sâ‚‚Oâ‚„. It is a powerful reducing agent with a pungent sulfur-like odor and is soluble in water but unstable in acidic or moist environments. Sodium hydrosulphite is available in various commercial grades, typically distinguished by their purity levels — commonly 90% and 88%. The compound is widely used in textile processing, water treatment, paper manufacturing, and chemical synthesis. Manufacturing Process Sodium hydrosulphite is typically produced through two main industrial processes: Zinc Process: Sodium bisulfite is reduced using zinc dust in the presence of sodium hydroxide to form sodium hydrosulphite. This process is known for producing high-purity material. Formate Process: Sodium formate is used as the reducing agent, in a reaction with sodium bisulfite and formaldehyde under controlled conditions. This method is considered more environmentally friendly and is commonly used in modern production. The final product is filtered, crystallized, and dried to meet desired purity levels such as 90% and 88%.