The chemical Neutral red has a designated molecular formula of C15H17ClN4 and a molecular weight of 288.779 g/mol. Synonyms may include: C.I. 50040, C.I. Basic Red 5, C.I. Basic Red 5, monohydrochloride, AI3-60242, 3-Amino-7-dimethylamino-2-methylphenazine hydrochloride, Aminodimethylaminotoluaminozine hydrochloride, Cerven neutralni [Czech], Cerven toluylenova [Czech], Cerven zasadita 5 [Czech], EINECS 209-035-8, Kernechtrot (ChemID).