REACH stands for Registration, Evaluation, Authorisation, and Restriction of Chemicals. It is a regulation of the European Union aimed at improving the protection of human health and the environment from the risks posed by chemicals. Under REACH, companies must register chemical substances they produce or import, providing detailed information about their properties and uses. The regulation also requires the evaluation of these substances to assess their safety. If a chemical is found to be particularly hazardous, it may be subject to authorisation or restrictions to limit its use. This helps ensure that chemicals are managed responsibly and safely within the EU.