Title: safety Long Title: IUPAC Gold Book - safety DOI: 10.1351/goldbook.14407 Status: current Definition Reciprocal of risk: practical certainty that injury will not result from a hazard under defined conditions. Notes 1) Safety of a drug or other substance in the context of human health: the extent to which a substance may be used in the amount necessary for the intended therapeutic purpose with a minimum risk of adverse health effects. 2) Safety (toxicological): The high probability that injury will not result from exposure to a substance under defined conditions of quantity and manner of use, ideally controlled to minimize exposure. Source - PAC, 2010, 82, 679. 'Explanatory dictionary of key terms in toxicology: Part II (IUPAC Recommendations 2010)' on page 731 (https://doi.org/10.1351/PAC-REC-09-03-01) Other Outputs - html: https://goldbook.iupac.org/terms/view/14407/html - json: https://goldbook.iupac.org/terms/view/14407/json - xml: https://goldbook.iupac.org/terms/view/14407/xml Citation: Citation: 'safety' 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.14407 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: 2026-04-19T08:13:16+00:00