Comparison of Dye Structure
| Class | Derived from | General formula |
| Acridine |  |
 |
| Anthraquinone |  |
 |
| Diarylmethane |  |
 |
| Triarylmethane | |
 |
| Azo |  |
 |
| Diazonium |  |
 |
| Nitro |  |
 |
| Phthalocyanine |  |
 |
| Quinone-imine Azin |
 |
 |
| Quinone-imine Oxazin |
|
 |
| Quinone-imine Thiazin |
|
 |
| Tetrazolium |  |
 |
| Xanthene Fluorene - Pyronin |
 |
 |
| Xanthene Fluorene - Rhodamine |
|
 |
| Xanthene Fluorone |
|
 |
Reference
R. D. Lillie.
Conn's Biological Stains
Williams & Wilkins, Baltimore, MD., U.S.A.