US CDC - Occupational Carcinogens
NIOSH Carcinogen List
A list of substances NIOSH considers to be potential occupational carcinogens. Some of the potential carcinogens listed in this index may be re-evaluated by NIOSH as new data become available and the NIOSH recommendations on these carcinogens either as to their status as a potential occupational carcinogen or as to the appropriate recommended exposure limit may change.
NIOSH launched a process to update it's policy on occupational carcinogens in late 2011. The public review period for the draft ended Februay 2014. More information is available here.
The NIOSH listing includes substances with no CAS number of variable or unclear chemical makeup that are considered carcinogens, coal tar pitch volatiles, coke oven emissions, diesel exhaust and environmental tobacco smoke. Substances without CASRNs are selectively and manually mapped into Pharos and some compound groups are not yet populated.