COSHH stands for "Control of Substances Hazardous to Health." It is a set of health and safety regulations in the United Kingdom designed to protect workers from ill health caused by exposure to hazardous substances in the workplace. These substances can include liquids, solids, fumes, dust, vapors, fibers, gases, biological agents like bacteria and viruses, and more. COSHH regulations require employers to assess risks, implement control measures, and minimize workers' exposure to such hazardous materials to avoid health damage such as lung disease, skin damage, or other serious illnesses. Breaching COSHH regulations can lead to legal penalties including unlimited fines.