Appearance:Purple shiny scales or particles
Properties:Soluble in ethanol, methanol, amyl alcohol, acetone, acetic acid and phenol, slightly soluble in water and ether, almost insoluble in chloroform, benzene and petroleum ether.
Uses:Titration mineral acid, alkali and some alkaloids in acid-base indicator, pH4.4 (Red) ~ 6.4 (blue). Determination of the alkalinity of water and temporary hardness. Histochemical examination of callus. Pollen tube staining. Can be made into strips, higher sensitivity than litmus.
Storage:Sealed in a cool dry place.