Process for preparing 7-hydroxy-1,2-naphthoquinone-2-diazide-4- sulfonic acid or salts thereof

摘要

A process for preparing 7-hydroxy-1,2-naphthoquinone-2-diazide- 4- sulfonic acid or salts thereof, of the general formula Z ##STR1## is disclosed in which X=hydrogen, a metal or an ammonium group, preferably an alkali metal or alkaline earth metal, especially sodium or potassium and the ammonium group.PPThe compounds can be used as much or as intermediates or starting materials for the production of light-sensitive compounds and radiation-sensitive mixtures and materials.