120-53-6 2(3H)-Benzothiazolethione, 6-ethoxy- 2-BENZOTHIAZOLETHIOL, 6-ETHOXY- 2-Mercapto-6-ethoxybenzothiazole 6-Ethoxy-2-mercaptobenzothiazole AI3-17238 EINECS 204-405-5 NSC 503424 USAF PD-58