On 31 October 2023, the European Commission granted an Authorisation for the following substance:

1. Chromium trioxide

Authorisation number REACH/23/26/0/R1 is held by Volta Energy Solutions Hungary Kft, and approves the use of Chromium trioxide in industrial formulation of a chromium trioxide solution below 0.1% w/w concentration for the passivation of copper foil used in the manufacture of Lithium-Ion Batteries (LiB) for motorised vehicles