Cas No. 81-93-6
Molecular formula C18HClN4
Molecular weight 322.79
Phenosafranine
Green shiny crystal. It is easily soluble in water and alcohol. The water and alcohol are purple-red and have green-yellow fluorescence.
Melting point: 300 ° C
The product is used as an acid-base indicator, with a pH range of 0.3 (blue) ~ 1.0 (red); redox indicator; adsorption indicator, titration of Cl-, Br- with AgNO3, the end point changes from red to blue; in sulfuric acid In the medium, the reagent cation and the bromoauric acid complex anion form a red ion association complex, which is extracted with isoamyl acetate for photometric determination; also used as a biological stain.
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