By June 1, 2016, users of these products need to have their inventories converted to GHS labeled products. At that point, the transition is over, and the US will have fully implemented the GHS standard based on the UN 2009 Purple Book classifications....
TDG与GHS之间的对比
,The Globally Harmonized System of Classification and Labelling of Chemicals : GHSPurple book 全球化学品统一分类和标签制度,内容,第一部分 GHS