Keeping your dossier up to date

The registration dossier has to reflect the current knowledge on how your substance can be used safely at production sites and by users throughout the supply chain. This means that after you have successfully submitted a registration and received your registration number, you still have work to do.

You have to update your registration – or contribute to the update of the joint part of your registration when:

  1. Your knowledge on the substance or its use changes e.g. higher tonnage band, new uses, change in composition of the substance, etc.
  2. You receive an evaluation decision requesting you to add information to your registration.

Changes that will impact your dossier updates

Changes in information requirements for registering chemicals under REACH, might have an impact on your dossier updates. You should also pay attention to the changes of the harmonised classification and labelling of hazardous substances which is updated through an ‘Adaptation to Technical Progress (ATP)’ and issued yearly by the European Commission.

ECHA may perform IT screening campaigns on dossiers to highlight the aspects of registrations that can be improved. As a result, ECHA may remind a registrant to perform an update of their registration dossier to address the highlighted concerns, as well as to improve the quality of data in future submissions. However, it remains the registrant’s responsibility to keep their data up to date. As a registrant, you should consider your dossier as a ‘living document’ and update it whenever new information is available.


Remember to keep all your administrative information – such as the information on your legal entity, address and contact person – in REACH-IT up to date. This way, the authorities and your co-registrants will always be able to reach you regarding your registration.