You should use this webform if you want to request a change to the chemical identifiers of a registered substance.

The information you submit with this request is assessed by ECHA. If the Agency considers that the service can be provided, it will issue a service charge to each affected registrant.

Please fill in the following fields. Compulsory fields are marked with an asterisk (*). Please also attach a "Joint Submission Plan" (JSP) and documentary evidence that all the co-registrants agree with the adaptations specified in the JSP (if applicable) and that they commit to update their dossier within 2 months after ECHA carries out the technical changes in REACH-IT. You can download a JSP template (Microsoft Excel document) from this link. The template can be used for both joint submissions and individual submissions. Please read carefully the instructions included. When done, click the Submit to ECHA button below.

• In order for ECHA to process your request, you must be able to demonstrate that the substance identity information included in the original dossier (such as a spectroscopic fingerprint, a chromatographic fingerprint, the manufacturing process description or any statement made in the dossier) demonstrates that the substance with new identifiers was intended to be covered in the original dossier.
• Your request must include a justification that explains why you are requesting a change of identifiers. If you have received a communication letter from ECHA asking you to submit the request, you can provide the ECHA communication number instead of a justification.
• ECHA cannot process a request when a REACH or CLP process (such as evaluation) is ongoing.