2023 TLVs and BEIs PDF

The information in this user-friendly, pocket-sized publication is used worldwide as a guide for evaluation and control of workplace exposures to chemical substances and physical agents. Threshold Limit Value (TLV) occupational exposure guidelines are recommended for more than 700 chemical substances and physical agents. There are more than 50 Biological Exposure Indices (BEIs) that cover more than 80 chemical substances. Chemical Abstract Service (CAS) registry numbers are listed for each chemical. Introductions to each section and appendices provide philosophical bases and practical recommendations for using TLVs and BEIs).

TLV-CS

• Endotoxins NIC is proposed
• Glyphosate is adopted with an A4 carcinogen designation
• Tertiary Butyl Hydroperoxide NIC is proposed with an A2 carcinogen designation

BEI

• Xylenes BEI lowers the existing BEI

PAC

• Proposed revisions to the Infrasound and Low-Frequency Sound TLV update the TLVs table and the cited literature