| 描述 | Phenolphthalein (Standard) is the standard substance of Phenolphthalein, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Phenolphthalein (Phthalin) is an acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic. |