SANDOZ CHEMICAL WORKS, INC. … Chloramine Brown GRD Pyrazol Fast Brown BRL 0-25 y« 1°/* 3 °/o Pyrazol Fast Brown C 0-25% l°/o 3 °/« Pyrazol Fast Brown C (Formaldehyde) 25
Dyes and dyeing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
