According to the announcement released by ten departments including the State Administration of Work Safety (No. 5, 2015),the Catalog of Hazardous Chemicals(2002) and the List of Highly Toxic Chemicals(2002) were abolished and merged into the Catalog of Hazardous Chemicals(2015).A total of 148 entries of highly toxic chemicals were selected according to the new list. Compared to the previous edition with 335 entries for highly toxic chemicals, 195 entries were deleted, 140 entries were retained, and 8 entries were added.