| Answer | Crossword Clue |
|---|---|
| ANIL | Blue dye obtained from indigo |
| indigotin | the blue colouring matter of indigo, obtained by hydrolysis from indican |
| indigotins | INDIGOTIN, the blue colouring matter of indigo, obtained by hydrolysis from indican |
| trypan | as in trypan blue, a blue dye obtained from tolidine |
| indigos | INDIGO, a blue dye |
| indigoes | INDIGO, a blue dye |
| indigotin | A dark blue crystalline compound that is the main constituent of the dye indigo |
