1-(2-Aminoethyl)-3-(5-chlorobenzo[c][1,2,5]thiadiazol-4-yl)thiourea is an unlabeled intermediate in the synthesis of Tizanidine-d4 (T449502), a labelled Tizanidine. An α2-adrenergic agonist; centrally active myotonolytic. A muscle relaxant (skeletal).