REACH - Applications for authorisation AFA048-01 Chromium trioxide

Closed 22 Sep 2023

Opened 28 Jul 2023


Public consultation on alternatives

Reference: AFA048-01

Applicant: Surface Engineering Association Chromium Trioxide Authorisation Consortium (1 company – see name on application documents)

Application type: Initial

Substance name: Chromium Trioxide

EC number: 215-607-8

CAS number: 1333-82-0

Proposed use: Use of chromium trioxide for the surface treatment of engineering components, mainly for the aerospace and defence sector, with the purpose of creating a coating to meet specific and critical performance characteristics.

Broad information on use applied for (conditions of use and function): The formulation of the chromium trioxide solution (chromic acid), specifically producing chromic acid from trioxide by the addition of water, is performed in a purpose-built self-contained area and is away from other activities. Chromium trioxide does not have a specific functionality at the formulation (mixing) stage apart from being incorporated into formulations for use by authorised users. The production area is bunded in line with best practice guidance and the mixing and main storage vessel are both enclosed. Any waste that is generated is disposed off-site through the use of registered hazardous waste contractors.  

This application covers the use of chromium trioxide for the formulation of surface treatment process solution at 1 company.

List of descriptors:

  • Life cycle stage (LCS): Use at industrial site  
  • Sector of end Use (SU): 0 (Other: manufacture of products for automotive and other applications)  
  • Product Category (PC): 14 (Metal surface treatment products)  
  • Process Category (PROC): 1, 2-5, 8a, 8b, 9, 15  
  • Environmental Release Category (ERC): ERC6B  
  • Article Category related to subsequent service life: N/A  
  • Technical Function (TF): Formulation of surface treatment solution 

Annual tonnage used: 5 tonnes

Review period requested: 12 years 

How to submit comments

Provide some basic information on possible alternative(s) in the online survey below but more detailed information should be provided in document(s) prepared using the commenting templates in the related section below. A “public version” should always be completed and will be published after the consultation has closed. If you want to include confidential information in your submission, please additionally complete a “confidential version” and submit both versions as attachments.

The consultation lasts for 8 weeks (unless otherwise specified) and closes at 23:59 London time (BST).


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