Title: biological exposure index Long Title: IUPAC Gold Book - biological exposure index DOI: 10.1351/goldbook.BT06901 Status: current Index: quantity Definition Reference values intended as guidelines for the evaluation of potential health hazards in the practice of industrial hygiene. BEIs represent the levels of determinants that are most likely to be observed in specimens collected from a healthy worker who has been exposed to chemicals to the same extent as a worker with inhalation exposure to the TLV. Related Terms - TLV: https://goldbook.iupac.org//terms/view/TT06915 - exposure: https://goldbook.iupac.org//terms/view/ET06811 Source - PAC, 2001, 73, 993. 'Risk assessment for occupational exposure to chemicals. A review of current methodology (IUPAC Technical Report)' on page 1021 (https://doi.org/10.1351/pac200173060993) Other Outputs - html: https://goldbook.iupac.org/terms/view/BT06901/html - json: https://goldbook.iupac.org/terms/view/BT06901/json - xml: https://goldbook.iupac.org/terms/view/BT06901/xml Citation: Citation: 'biological exposure index' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.BT06901 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. Accessed: 2026-06-07T00:13:45+00:00