Sodium Thiosulphate (Hypo) is a classic industrial reducing salt with mature downstream application system, and Linkwin independently produces pentahydrate crystal hypo and anhydrous hypo with separated production lines to avoid mixing, controlling sulfide, insoluble matter and heavy metal impurities strictly to prevent peculiar smell, sediment and poor reduction effect in end formulations. Pentahydrate crystal hypo has moderate solubility, low production cost, most widely used in large-volume textile continuous production lines; anhydrous sodium thiosulfate has low water content, less deliquescence tendency, stable chemical property under long-term storage, meeting strict requirements of photographic chemical and high-end fine chemical formulation. Its core chemical characteristic is strong reducibility, capable of rapid reaction with free chlorine, hypochlorite and heavy metal ions, realizing dechlorination, detoxification and precipitation separation functions.

In textile printing and dyeing industry, hypo is essential post-bleaching neutralizing agent: after sodium hypochlorite or hydrogen peroxide bleaching process, residual active chlorine will cause fabric brittle yellowing during storage; adding hypo can completely decompose residual chlorine, protect fiber strength and stabilize fabric whiteness, also used for desulfurization treatment of sulfur dyed fabrics. Photographic industry takes hypo as standard fixing agent, dissolving unexposed silver halide on negative film and photo paper to form stable image layer, which is the indispensable raw material for traditional photo processing and printing plate making. Environmental water treatment sector uses hypo as dechlorinating agent for disinfected municipal and industrial wastewater to eliminate residual chlorine toxicity before discharge; it can also form insoluble precipitates with copper, lead, mercury and other heavy metal ions for heavy metal wastewater treatment. Many overseas dyeing and environmental customers frequently encounter insufficient reducing power, sulfide peculiar smell and easy deliquescence caking problems from inferior hypo suppliers; our recrystallization purification and classified packaging completely solve these quality defects, stabilizing your process treatment effect and production cost control.

Test Item	Specification Standard
Product Name	Sodium Thiosulphate (Hypo) / Pentahydrate Crystal & Anhydrous
Available Type	Pentahydrate Crystal Hypo, Anhydrous Hypo
Appearance	Transparent Crystal / White Powder
Key Controlled Impurities	Sulfide, Water Insoluble Matter, Heavy Metals, Moisture
Core Application	Textile post-bleach dechlorination neutralizer, photographic fixing agent, wastewater dechlorination & heavy metal removal agent
Supporting Certificates	Batch COA, MSDS, third-party inspection report
Packaging Option	25kg Woven Bag, Jumbo Bag Bulk

Standard packaging is 25kg inner PE liner outer woven bag, jumbo bag bulk shipment customizable for large orders to reduce unit logistics expenditure. We maintain adequate year-round inventory reserves to shorten order lead time and avoid raw material shortage affecting continuous dyeing and wastewater treatment operation. Complete export documents including batch COA, MSDS and impurity test reports can be issued rapidly to streamline inorganic salt import customs clearance globally. Our sales team can tailor accurate FOB and CIF quotations based on crystal/anhydrous type, order quantity and destination port, support free sample delivery for process trial before bulk purchase, and provide technical guidance for dosing proportion matching in dechlorination and bleaching neutralization processes. Cooperating with Linkwin for sodium thiosulphate procurement optimizes auxiliary material cost structure, stabilizes process treatment quality and builds long-term competitive advantage in reducing agent raw material market.