Plk Bio-Chem Co. Ltd. is a research chemical manufacturer and wholesaler based in China. You can buy isotonitazene from our official site. We deal in Chemicals and provide chemicals on special offers for researchers, hobbyists and students. ||Address: N0. 446, Shijiazhuang, Hebei 050071, China ||Contact No.: 1800979769 ||E-mail: [email protected]