Workplace hazardous chemicals are substances, mixtures and articles used in the workplace that can be classified according to their health and physicochemical hazards. Health hazards are hazards like skin irritants, carcinogens or respiratory sensitisers that have an adverse effect on a worker’s health as a result of direct contact with or exposure to the chemical, usually through inhalation, skin contact or ingestion. Physicochemical hazards generally result from the physical or chemical properties, like flammable, corrosive, oxidising or explosive substances.