| S.No |
Name of dye |
Class of dye |
λmax
nm |
Structure of dye |
| 1. |
Malachite Green |
Triarylmethane |
618 |
 |
| 2. |
Naphthol Green B |
Nitroso |
714 |
 |
| 3. |
Toudine Blue |
Thiazin |
626 |
 |
| 4. |
Methyl Blue |
Triarylmethane |
607 |
 |
| 5. |
Ponceau BS |
Azo (di) |
505 |
 |
| 6. |
Amido Black |
Azo (di) |
618 |
 |
| 7. |
Congo Red |
Azo (di) |
497 |
 |
| 8. |
Eriochrome Black T |
Azo (mono) |
560 |
 |
| 9. |
Drimarene Black CL BGR |
Azo (di) |
597 |
 |
| 10. |
Reactive Black 5 |
Azo (di) |
597 |
 |
| 11. |
Thiazole Yellow G |
Azo (mono) |
402 |
 |
| 12. |
Trypan Blue |
Azo (di) |
607 |
 |
| 13. |
Crystal Ponceau 6R |
Azo (mono) |
510 |
 |
| 14. |
Drimarene Red CL 4BN |
Azo (mono) |
532 |
 |
| 15. |
Drimarene Yellow CL 4R |
Azo (mono) |
400 |
 |
| 16. |
Acid Red 40 |
Azo (mono) |
506 |
 |
| 17. |
Orange G |
Azo (mono) |
475 |
 |
|
