On February 16, 2021, the Occupational Safety and Health Administration (OSHA) published a notice of proposed rulemaking (NPRM) to amend the Hazard Communication Standard (HCS). The HCS is the federal-level legislation that sets forth the classification, labeling, Safety Data Sheet (SDS), and training requirements for hazardous chemicals intended to be used, handled, or stored in workplaces. The current HCS is based on the third revised edition (Rev 3) of the United Nations (UN) Globally Harmonized System of Classification and Labeling of Chemicals (GHS). The proposed changes include updating the HCS to align with the seventh revised edition (Rev 7) of GHS. The transition period proposed is one year for chemical manufacturers, importers, and distributors of substances and two years for chemical manufacturers, importers, and distributors of mixtures after the effective final rule is published. The notice is open for comments until April 19, 2021. OSHA states that it will schedule an informal public hearing on the NPRM if a request is made during the comment period. If a hearing is requested, OSHA will announce the details in the Federal Register. For more information, please read the full memorandum.