Sodium Thiosulfate
Sodium thiosulfate pentahydrate, colorless monoclinic crystal, odorless, with a bitter taste. The specific gravity is 1.729, heated to 100 ° C, and 5 crystal waters are lost. Soluble in water, insoluble in alcohol, decomposed in acidic solution, with strong reducibility. It is easily weathered in dry air above 33 °C and deliquescent in humid air.
Sodium thiosulfate pentahydrate (baking soda/Haibo) is a colorless and transparent crystal. It is a hydrate of sodium thiosulfate, soluble in water, and the aqueous solution is weakly alkaline. It weathers in the dry air above 33 ° C and loses crystal water. It is stable in neutral and alkaline solutions and will decompose rapidly in acidic solution.
Introduction
Chemical name: Sodium thiosulphate
H.S code: 2832300000
Molecular formula: Na2S2O3*5H2O
Molecular weight: 158.11
Properties: Monoclinic crystal, Melting point: 40-45degree, Relative density: 1.729(17degree).
Packing: 25kg, 50kg plastic woven bag, or following your demand.
Technical Specification
Item | Photographic grade | Industrial grade | Anhydrous grade |
Appearance | Colorless transparent crystal | Colorless transparent crystal | White powder |
Assay | ≥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% |
PH | 6.5~9.5 | 6.5~9.5 | 6.5~9.5 |
Water solution reaction | In accordance with the test | In accordance with the test | ---- |
Granularity(g/g) | 12~16 | --- | ---- |
Application
1. Used in photographic and electroplate applications.
2. For purifying soft water and tanning hides.
3. As a reducing agent, fixers, blush preventive agent, reductant , sulfur dyeing agent, anti-whiting agent, detergent, disinfectant and color faking agent. dichromate during tanning; as a pesticide for the synthesis of insecticides
4. As baking soda, used in the manufacture of fixing powder and photographic industry to prepare fixer and desiccant; used in the leather industry as a reducing agent for as an analytical reagent, mordant and fixing agent Agent;
Packing
Sodium thiosulfate is packed in net weight 25kg plastic woven bag with plastic inner bag.25tons/20'FCL.
1000kg jumbo bag packing
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