Phenolphthalein or indicator of such a kind is used as colour indicator.
本发明还可加入酚酞或酚酞类酸碱指示剂作显色指示。
Acid calibration potassium hydroxide, to phenolphthalein as indicator.
钾标定，以酚酞为指示剂。
It is reacted with phenol to produce phenolphthalein, used as an indicator, a dye, and a pharmaceutical.
它与酚反应生产酚酞，可用作指示剂、染料和医药。
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