The OSHA proposed rule in July 2021 aims to update the Hazard Communication Standard to improve hazard communication and align with international regulations. Key changes include requirements for Safety Data Sheets and labels, such as alignment with the GHS seventh edition, disclosure of chemical reaction hazards, and revised labeling for small containers. Chemical suppliers should prepare for the final rule, expected in late 2021 or early 2022, by updating their documentation and notifying customers about the changes.