This document outlines Occupational Safety and Health Administration (OSHA) standards for hazardous materials under Subpart H. It covers regulations for compressed gases, flammables, explosives, liquefied petroleum gases, anhydrous ammonia, highly hazardous chemicals, and more. Definitions are provided for key terms like hazardous chemical, highly hazardous chemical, aerosol, container, fire area, flash point, and flammable/combustible liquids. Limits for flammable ranges and storage requirements for containers and portable tanks are also summarized.