Figure 1. Categories of dyes1 by nature of their cromophore

▪ Category: Acridine dyes, derivates of acridine
▪ Category: Anthraquinone dyes, derivates of anthraquinone
▪ Arylmethane dyes
Category: Diarylmethane dyes, based on diphenyl methane
Category: Triarylmethane dyes, derivates of triphenyl methane
▪ Category: Azo dyes, based on -N=N- azo structure
▪ Cyanine dyes, derivates of phthalocyanine
▪ Diazonium dyes, based on diazonium salts
▪ Nitro dyes, based on a -NO2 nitro functional group
▪ Nitroso dyes, based on a -N=O nitroso functional group
▪ Phthalocyanine dyes, derivates of phthalocyanine
▪ Quinone-imine dyes, derivates of quinone
Category: Azin dyes
Category: Eurhodin dyes
Category:Safranin dyes, derivates of safranin indamins
Category: Indophenol dyes, derivates of indophenol
Category: Oxazin dyes, derivates of oxazin
Oxazone dyes, derivates of oxazone
Category: Thiazin dyes, derivates of thiazin
▪ Category: Thiazole dyes, derivates of thiazole
▪ Xanthene dyes, derived from xanthene
Fluorene dyes, derivates of fluorene
Pyronin dyes
Category: Fluorone dyes, based on fluorone
Category: Rhodamine dyes, derivates of rhodamine