A substance hazardous to health is a substance or mixture with the potential to cause harm if they are inhaled, ingested, or come into contact, or are absorbed through the skin.

 

Nearly 20% of workers in the EU reported being exposed to chemical products or substances for at least a quarter of their working time, a proportion practically unchanged since 2000, and 15% report breathing in smoke, fumes, powder or dust at work according to the European Agency for Safety and Health at Work.