White Powder Sodium Sulfite Photography, Sodium Sulfite Dechlorination

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SODIUM SULFITE ANHYDROUS Sodium Sulfite 1.Manufactory Price 2.High Quality 3.Good Price 4.Prompt Delivery Sodium Sulfite Specification: - - - - Quality Standard(GB2967-2000) | Items | Company Standard | Sodium sulfite(Na2SO3) % | 97 | Fe % | 0.003 | Water insoluble material % | 0.02 | Free alkali(Na2SO3) % | 0.1 | Na2SO4 % | 2.5 | NaCl % | 0.1 | - - - - White crystal or powder; no foul. Soluble in water, very slightly soluble in ethanol, almost insoluble in ether. White hexagonal prismatic crystals, soluble in water (0 12.54g/100ml water; 80 when the 283g/100ml water), in 33.4 The maximum solubility of about 28% when the aqueous solution is alkaline, PH value is about 9 ~ 9.5 . Slightly soluble in alcohol, insoluble in liquid chlorine, ammonia. Easily oxidized in air sodium, when the temperature is decomposed into sodium sulfide. To strengthen the reducing agent, reacts with sulfur dioxide, sodium bisulfite, reacted with the acid salt. Usage: The role of anhydrous sodium sulfite is extensive, it is in the pharmaceutical industry, paper making, leather tanning and dyeing industries and plant fiber bleaching, food, etc have a very important role. Addition of anhydrous sodium sulfite is also used to film developing, bleaching agents, printing and dyeing industry as a deoxygenation agent. Specification: - - - - Anhydyous sodium sulphite | English name | Anhydyous sodium sulphite | Molecular formula | Na2SO3 | Technical specifications | High purity grade | Refined grade | Photographic grade | Industrial grade | Industrial grade | Industrial grade | Sodium sulfite | Sodium sulfite | Sodium sulfite | High-class product | High-class product | First grade product | Na2SO3 % | 98 | 98 | 97 | 98 | 97 | 96 | Fe % | 0.0005 | 0.002 | 0.005 | 0.003 | 0.003 | 0.005 | Water insoluble % | 0.005 | 0.01 | 0.05 | 0.02 | 0.02 | 0.03 | Free alkali % | 0.1 | 0.3 | 0.15 | 0.1 | 0.1 | 0.4 | Sodium sulfate % | 1.5 | 1.5 | | 1.5 | 2.5 | | Sodium chloride % | 0.005 | 0.02 | | 0.01 | 0.1 | | Heavy metal on Pb % | 0.001 | 0.002 | 0.002 | | | | As % | 0.0001 | 0.0005 | | | | | Sodium thiosulfate % | 0.01 | 0.02 | 0.03 | | | | Aqueous solution appearance | Qualified | Qualified | Qualified | | | | Reaction of silver nitrate ammonia solution | | | Qualified | | | | - - - - 10. Packing : External packing is PP woven bag, Internal packing is PE bag,25 kgs, 50 kgs, 1000 kgs, and 1250 kgs bag packing. 11. Storage & defence: Stored in cool and dry place, avoid moisture and heat. No breakage, No mixed with oxidant and toxic matter. The storage period is 6 month since the production date. It should be transported by clean car, with covering matter, avoid rain.

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KEMSKY CHEMCAL CO.,LIMITED

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