This monograph for o-Tolidine Dihydrochloride provides, in addition to common physical constants, a general description including typical appearance and applications. The monograph also details the following specifications and corresponding tests for verifying that a substance meets ACS Reagent Grade specifications including: Sensitivity to Chlorine, Solubility, and Residue after Ignition.
APPLICATION : Sensitive colorimetric reagent for gold and for free chlorine in water.