Factory Supply 25kg 99% Industrial Crystal Sodium Thiosulphate Pentahydrate Anhydrous CAS No.: 7772-98-7
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.
Appearance: Colorless, transparent crystal or crystalline fine grain
Formula: Na2S2O3/Na2S2O3 5H2O
CAS No.: 7772-98-7
EINECS No.: 231-867-5
HS CODE: 28323000
Storage: Airtight save
Main Characteristic of Sodium Thiosulphate:
1.colorless and transparent crystal.
2.It is a hydrate of sodium thiosulfate, soluble in water, and the aqueous solution is weakly alkaline.
3. It weathers in the dry air above 33 ° C and loses crystal water.
4. It is stable in neutral and alkaline solutions and will decompose rapidly in acidic solution.
Specification of Sodium Thiosulphate:
|
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 |
Applications of Sodium Thiosulphate:
1. Sodium thiosulphate can adjust the PH balance of water quality in aquaculture; it can also absorb organic suspended solids in water bodies, thereby purifying water quality.
2. Sodium thiosulfate solution can dissolve the unsensitized silver bromide in the developed photographic film into a colorless complex and remove it, so it is a commonly used fixing agent.
3. Reducing agent for dichromate when tanning leather.
4. In the paper industry, it is used as a remover after pulp bleaching.
5. In the printing and dyeing industry, it is used as a dechlorination agent after bleaching cotton fabrics, a sulfur dye for knitted fabrics, and an anti-whitening agent for indigo dyes.
6. Analytical chemistry is used as reagents for chromatographic analysis and volumetric analysis.
Package & Storage of Sodium Thiosulphate:
25 KG bag , 25MT/20'FCL .also be packed according to customer's needs.
Store closed containers in a cool, dry, well-ventilated area. Avoid exposure to direct sunlight.
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