| M Formula: | C27H34N2O4S |
| Properties: | |
| Yellow crystals. Soluble in water and alcohol. | |
| Derivation: | |
| Condensation of benzaldehyde with diethylaniline in presence of sulfuric acid, followed by oxidation of the triphenylmethane product formed and conversion to sulfate. | |
| Use: | |
| Dyeing textiles, inks, etc.; indicator; staining bacteria; antiseptic. | |