In an office environment, chemicals can come in the form of cleaners, paints, flammable aerosols, gas cylinders, which all have their own unique set of hazards. Workers need to know how to identify and deal with these hazards. This e-course explains common chemical hazards found in office buildings and provides workers, supervisors, managers, building operations personnel, and cleaning and custodial staff with the core knowledge required to meet legislated WHMIS 2015 education requirements. Quizzes throughout the course and an exam help to measure and encourage learning. The course was developed by the Canadian Centre for Occupational Health and Safety (CCOHS).