Tag : Methyl Red

The Synthesis of Methyl Red

Written by Teresa Introduction Methyl red is a type of dye that can be used as a pH indicator similar to the use of phenyphthalein.  The purpose of this laboratory was to synthesize methyl red using a two-step synthesis. This is an important synthesis due to the use of two important reactions: changing a carboxylic acid by converting the amino group and then a diazocoupling reaction (two molecules are coupled by an azo bridge) through a pseudo electrophilic aromatic substitution.  […]