Hydrochloric Acid → HCID 19898458, compound

Participants

Reaction Steps

8-Methoxy-1-acetylaminonaphthalene-4-sulfonic acid is suspended in 20%-strength hydrochloric acid and the suspension is heated under a reflux condenser while stirring at 90°-100° C. After approx 1-11/2 hours, the deacetylation is complete. The mixture is allowed to cool to 20°-25° C., the slightly pink-colored crystals are filtered off by suction, they are washed on the sintered disk filter funnel with water and then dried in a vacuum drying oven at 50°-60° C.

Provenance & Evidence