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Langfang Tianke Biotechnology Co., Ltd.
Langfang Tianke Biotechnology
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Hotline:+86-15076659665
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Sodium thiosulfate

Sodium thiosulfate

Molecular formula: Na2S2O3·5H2O
Molecular weight: 248.18
Properties: Colorless crystal or white particle, no odor. Weathering in the dry air. Soluble in water and insoluble in ethyl alcohol. Density is 1.729. It loses water of crystallization at 100℃.
Uses: As analytical reagent such as oxidation-reduction titration agent and reducing agent. As mordant and fixing agent.
Standard:

Specifications/item

AR

CP

Assay(Na2S2O3·5H2O)/百分比

≥99.0

≥98.5

PH value (50g/L solution,25℃)

6.0~7.5

6.0~7.5

Clarity test

Qualified

Qualified

Water insoluble matter/百分比

≤0.005

≤0.01

Chloride(Cl) /百分比

≤0.02

Sulfate and sulfite(SO4) /百分比

≤0.05

≤0.1

Sulfide(S) /百分比

≤0.000 25

≤0.000 5

Total nitrogen(N) /百分比

≤0.005

Magnesium (Mg) /百分比

≤0.001

Calcium (Ca) /百分比

≤0.003

≤0.005

Iron (Fe) /百分比

≤0.000 5

≤0.001

Heavy metal (Pb) /百分比

≤0.000 5

≤0.001

Packing: Plastic woven bag lined with plastic bag, kraft bag, carton or fiber drum, net weight is 25kg.

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Langfang Tianke Biotechnology Co., Ltd.
Add: Sanghang Industrial Park, Dacheng County,
Hebei, China
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