| Chemistry name: | sodium α-naphthylaminesulfonate |
| M Formula: | NH2C10H6SO3Na•4H2O |
| Properties: | |
| White crystals, turns violet on exposure to light. Soluble in water; insoluble in ether. Combustible. | |
| Grade: | |
| Technical (paste, crystals). | |
| Use: | |
| Riegler's reagent for nitrous acid, manufacture of dyestuffs. | |