Robuta

https://lnu.diva-portal.org/smash/record.jsf?pid=diva2%3A390086 Biodegradation of azo and anthraquinone dyes in continuous systems anthraquinone dyes biodegradation azo continuous systems https://patents.google.com/patent/DE430901C/en DE430901C - Process for the preparation of Kuepen dyes of the anthraquinone series - Google Patents for the google patents process preparation dyes