1,2-Diaminoethane,1,2-Ethanediamine,Tizanidine Hydrochloride Impurity H (Freebase) (EP/BP), ethane-1,2-diamine, 1,2-Diaminoethane, Chlor-ethamine, Dimethylenediamine, Ethylenediammonium, 1,2-Ethanediamine, 1,2-Ethanediamine (USP).