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Thiosulfate |
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 Method
Reference: APHA Standard Methods, 20th ed., pp. 4-173, Method 4500-SO3 2- B (1998).
Thiosulfate is an excellent reducing agent. It is used primarily as an antichlor or chlorine-removing agent in various chemical processes, including the bleaching of pulp, paper, and textiles.
CHEMetrics’ method employs the iodometric chemistry. Although sulfite usually titrates as thiosulfate, the reagent has been formulated to inhibit high-level sulfite interferences. Thiosulfate is titrated with iodide-iodate titrant in acid solution using a starch indicator. Results are expressed as ppm (mg/L) S203. |
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| • Click to View MSDS and Kit instructions |
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 Visual Kits |
5-50 ppm
5.0 ppm / Method: Iodometric |
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Cat# |
| Titrets Kit |
K-9705 |
| | Increments:
5.0,. 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 9.0, 10.0, 12.5, 15.0, 17.5, 20.0, 25.0, 35.0, 50.0 ppm | |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules with valve assemblies, Neutralizer Solutions, titrettor, 25 mL sample cup, instructions, and MSDS. | |
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Kit Components common to Thiosulfate |
| Description |
Cat# |
| | Sample Cup Pack, 25 mL (6 ea) | A-0013 |
| | Titrettor Pack (1 ea) | A-0053 |
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