This companion document to the ACGIH® TLVs® and BEIs® book serves as a readily accessible reference for comparison of the most recently published values: 2016 Chemical Substance TLVs® from ACGIH®; AIHA/OARS Workplace Environmental Exposure Limits (WEELs); the OSHA Final Rule PELs; RELs from NIOSH; MAKs from the German Commission for the Investigation of Health Hazards of Chemical Compounds in the Workplace; and carcinogenicity designations from ACGIH®, OSHA, NIOSH, MAK, IARC, U.S. NTP, and U.S. EPA. The book includes a CAS number index.