We should share the key points you need to watch on REACH regulation obligations.

For substances that have already been registered in the EU, procured, used in products, and re-exported to the EU market, additional registration is not required.
If there is a registration obligation related to the chemical substances used in a product, the relevant firms should be contacted to request an inquiry into whether a registration application has already been filed for the same product. This approach helps applicants for the same chemical substance communicate with each other and share the costs.
Under the REACH regulation, registration applications for non-EU organizations are possible only by appointing an Only Representative or reaching agreement with importers.