| Answer | Crossword Clue |
|---|---|
| benzidine | A crystalline base used in making dyes and in detecting blood stains |
| benzidines | A crystalline base used in making dyes and in detecting blood stains |
| phenanthrene | A crystalline hydrocarbon present in coal tar, used esp. in making dyes and synthetic drugs |
| diphenylamine | A synthetic crystalline compound with basic properties, used in making azo dyes and as an insecticide and larvicide |
