CAS 5391-52-6 appears in our catalog under these names: 1-Acetylimidazolidinethione, 95%, Tizanidine Related Compound C, Tizanidine Impurity 4, 1-Acetylimidazolidinethione, >95% (HPLC), 1-Acetylimidazolidine-2-thione. Offered by: Combi-blocks, Chemat Brand, TRC, Mikromol, Biosynth. Available pack sizes: 1g, 250mg, 100mg, on request, 25mg, 50mg.