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Sodium thiosulfate 7772-98-7 99%Sodium thiosulfate
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Sodium Thiosulfate Anhydrous Reagent grade Na2S2O3 7772-98-7
molecular formula: Na2S2O3
CAS: 7772-98-7
Appearance:
White powder
Properties:
Single crystal is inclined white crytallized powder, a proportion of 1.667, soluble in water, alcohol, insoluble in air heating oxidation is decomposed into sodium and sulfur dioxide. In pure oxygen in combustion is generating sodium, method and sulfur.
Use:
Mainly used for photographic industry as fuser agent. Tanning when potessium dichromate salt reductants and nitrogen exhaust neutralizers, salt, wheat stem and hair bleach and pulp bleaching agent of the emergence of chlorine when. Also used in tetraethyl lead, dye intermediates such as manufacturing and ore mention silver etc.
Details:
Test item |
Specification |
|
Reagent grade |
Pharmaceutical grade |
|
Appearance |
Conform |
Conform |
Assay /% |
≥99.0 |
≥98.5 |
Clarify degrees test |
Conform |
Conform |
Water insoluble/% |
≤0.005 |
≤0.01 |
Chloride (Cl)/% |
≤0.02 |
- |
Sulphate and sulphite (SO4)/% |
≤0.05 |
≤0.1 |
Sulfide (S)/% |
≤0.00025 |
≤0.0005 |
N/% |
≤0.005 |
- |
Magnesium (Mg) /% |
≤0.001 |
- |
Calcium (Ca) /% |
≤0.003 |
≤0.05 |
Ferric (Fe)/% |
≤0.0005 |
≤0.001 |
Heavy metal (Pb)/% |
≤0.0005 |
≤0.001 |
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