On Jan. 31, ACGIH announced that its board of directors had ratified the 2019 Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices. ACGIH has adopted TLVs for several chemicals, including fluorine, indium tin oxide, and propylene glycol ethyl ether. The organization adopted BEIs for ethylene oxide, N-ethyl-2-pyrrolidone, and n-Hexane.  ACGIH also approved recommendations for additions to the Notice of Intended Changes list. The NIC list indicates substances and agents for which a limit or BEI is proposed for the first time, as well as substances and agents whose TLV or BEI may be changed or withdrawn. The 2019 NIC list includes acrylamide, antimony trioxide, styrene, and whole-body vibration. TLVs and BEIs are health-based values derived from ACGIH’s conclusions of the exposure levels that typical workers can experience without adverse health effects. For more information, read ACGIH’s press release. ACGIH provides an overview of TLVs and BEIs on its website. The 2019 NIC list is also available.