What is a hazardous substance?
A substance hazardous to health is anything that is hazardous in the form in which it may occur in the work activity. A substance hazardous to health need not just be chemical compounds, it can include mixtures, micro-organisms, natural materials such as flour, wood dust.
When using substances which are potentially hazardous to health, the process requires the all the substances involved in the process to be assessed and appropriate controls to mitigate the risks implemented. In some situations a formal 'COSHH' assessment may be required in addition to the process risk assessment. In others situations a SIN or TIN may be suitable. Please use the links in the right hand column for further information.
Essential information about hazardous substances is available on the Safety Data Sheet (sometimes also referred to as an SDS, Safety Data Sheet): see guidance on how to interpret this information.