Almost all industries and sectors are affected.

REACH affects EU based producers of chemicals, preparations, but also downstream users of chemicals and producers of finished products.
REACH affects companies producing outside the EU and exporting chemicals, preparations, finished products to the EU market.

The same company may be importer/producer and downstream user for different substances.

Some examples:

If your supplier of chemicals is based outside EU, your company is considered to be the importer, and therefore will have to comply with the same obligations as an EU based producer of chemicals.

Even if you import components to the EU and assemble them, you have to comply with obligations under REACH related to the substances contained in the imported components.

Even if you import very small amount of substances below 1t per year, you’ll need to comply with REACH obligations regarding authorisation if some of these are substances of very high concern.