The Chemical Safety Guide, formerly the Laboratory Safety Guide, is a collection of chemical safety information that can be used to improve laboratory operations, develop standard operating procedures, and inform staff of the latest safety and regulatory requirements. It also serves as a component of UW–Madison’s Chemical Hygiene Plan and Policy. This web-based guidance represents the most up-to-date information and supersedes any previously published Laboratory Safety Guides. Contact the Office of Chemical Safety with any questions. An archived version of the old Laboratory Safety Guide is located here while we finish updating our guidance.