Wuhu New koren pharmaceutical Technology Co., Ltd.
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White powder, melting point: 251~255°C, PH discolouration range: 9.3 (colourless) ~ 10.5 (blue), burning residue (as sulphate): 0.1%. |
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Chongqing Xingcan Pharmaceutical Technology Co., Ltd.
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Thymolphthalein is often used as an acid-base indicator, its pH discoloration range is 9.4~10.6, and the color change is colorless to blue. It is often used as a 0.1% 90% ethanol solution, and is often mixed with other indicators to make its discoloration range narrower and Chemicalbook observation clearer. For example, an indicator made by mixing 0.1% ethanol solution of the reagent and a 0.1% phenolphthalein ethanol solution is colorless in acidic solution, purple in alkaline solution, and rosy at pH 9.9 (color change point), which is easy to observe. |
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