Hainan Huarong Chemical Co., Ltd.  

Product Name: Sodium Hyposulfite; Sodium Thiosulphate; Sodium Hyposulphite Model NO.: 99% min Grade Standard: Industrial Grade Appearance: Granular Type: Sodium Hydrosulfide Purity: ?99% Formula: Na2s2o3.5H2O CAS No.: 10102-17-7 Transport Package: 25kg/Bag Specification: 97.0% min Origin: China HS Code: 28323000 Product Description Specification:Na2S2O3 99.0% minInsolubles in water 0.01% maxNa2S 0.003%maxFe 0.003%maxParticle size (grain/gram) 15-18ItemPhotographic gradeIndustrial gradeAnhydrous gradeAppearancecolorless transparent crystalColorlesstransparent crystalwhite powderAssay≥99.00%≥98.5%≥97.0%Water Insoluble matter≤0.01%≤0.03%≤0.03%Sulfide≤0.001%≤0.003%≤0.001%Fe≤0.001%≤0.003%≤0.005%PH6.5~9.56.5~9.56.5~9.5Water solution reactionin accordance with the testin accordance with the test----Granularity(g/g)12~16-------Molecular formula: Na2S2O3.5H2OMolecular Weight: 248.17Application: used as photo fixing solution, dechlorination agent and printing and dyeing assistant after bleaching cotton fabric, also used in medicine, electroplating, tanning, metallurgy, dyestuff and so onPacking storage: packing with woven bag lined with polyethylene plastic bag or wooden barrel.The net weight per bag (drum) is 25kg or 50kg.Containers must be sealed.Store in a cool and dry warehouse, prevent from being exposed to the sun and rain during transportation.It should not be stored and transported together with acids and oxidants.Prevent moisture from melting.If the package is damp, it means that the contents have become desiccated and must be stacked separately from the dry package.Can not be stored in the open air, on the damp package to handle.In case of fire, water and sand can be used.Physicochemical properties: white monoclinic crystal.No smell, cool and bitter taste.Relative density 1.729 (17ºC).Melting point 40 ~ 45ºC.Heat to 100ºC and lose 5 crystalline water.Soluble in water, aqueous solution nearly neutral.Soluble in turpentine and ammonia.Insoluble in alcohol.Deliquescence in moist air.Easy weathering in dry air above 33ºC.It's reductive.It dissolves halogens and silver salts.