Indicator

The main products are thymolphthalein, o-Cresolphthalein, phenanthroline, bromophenol blue, bromocresol green, bromcresol purple, bromothymol blue, methylthymol blue, calcein, Giemsa stain, Coomassie brilliant blue, phenol red, murexide, nickel reagent, Litmus, fluorescein sodium, methylthioninium chloride, basic violet 3, phenolphthalein, and etc.