What is the historical name of the acid that dissolves phenazine?
Phenazine Phenazine is an organic compound with the formula (CH)N. It is a dibenzo annulated pyrazine, and the parent substance of many dyestuffs, such as the toluylene red, indulines, and safranines (and the closely related eurhodines). Phenazine crystallizes in yellow needles, which are only sparingly soluble in alcohol. Sulfuric acid dissolves it, forming a deep-red solution.
Hydroxyzine Hydroxyzine, sold under the brand names Atarax and Vistaril among others, is a first-generation antihistamine. It was first synthesized by Union Chimique Belge in 1956 and was marketed by Pfizer in the United States later the same year, and is still widely used today.