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Adopted opinions and previous consultations on applications for authorisation

Adopted opinions and previous consultations on applications for authorisation


This page provides further information on the applications for authorisation or review reports, which have undergone consultation. The applications for authorisation are in the opinion development phase until the final opinions of the Committees for Risk Assessment and Socio-economic Analysis have been adopted and sent to the European Commission. The European Commission's decision-making process can be followed through the comitology register, where further information is published about the REACH Committee's past and upcoming meetings.

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Substance Details

Chromium trioxide
EC Number
CAS Number
Entry Nr in Annex XIV
Use name
Industrial spraying of chromium trioxide mixtures for the coating of metallic articles subject to harsh environment to ensure either a low temperaturecured coating for corrosion protection, or a high temperature corrosion & oxidation resistance with reduction of surface roughness or a high temperature adhesive, for aviation, power generation machinery, Oil and Gas and marine applications.
Broad information on use applied for (conditions of use and function)
The main functional properties sought-after for the mixtures concerned by this use include:

- Low temperature-cured coatings for corrosion protection or
- High temperature corrosion & oxidation resistance with reduction of surface roughness and / or with antifouling property

The actual functional requirements depend on the market sector.

The mixtures impacted by the sunset date of chromium trioxide are based on the coating ability to sacrificially protect substrates from corrosion. This sacrificial behaviour is provided by the coating conductive aluminium structure, made possible by a dense dispersion of aluminium particles within a matrix (binder) of chromate-phosphate ceramic.

These mixtures are part of proprietary coating systems (basecoat and/or top coat). The most commonly used basecoat in different industries is the SermeTel W. Contrary to its OEM (Original Equipment Manufacturer) customers, PST does not use this basecoat as a standalone surface treatment process, but associated with a topcoat, thus forming a complete coating process.

Chromium trioxide is used in a mixture (concentration < 5%) to carry out spraying (by manual process) in one PST shop in the EU (Lincoln, UK) by 26 workers. PST implements standardised RMM to limit the risk for their workers.

The main argument to support this AfA is that at the moment no adequate alternatives have been identified that achieve the level of performances described above. Unfortunately, alternatives available for another use applied for by PST do not provide the level of performances required by this use.

Annual tonnage used: maximum 0.07 tonnes
Requested review period is 12 years
Use applied for number in application for authorisation
Broad information on use applied for (Use descriptor system)
Sector of end use (SU): 17
Environmental release category (ERC): 5
Process category (PROC): 7, 8b, 10, 13, 21, 22, 26
Product category (PC): 14
Article category related to subsequent service life (AC):
Technical Function: Corrosion inhibitors and anti-scaling agents, plating agents and metal surface treating agents
Summary table of RMMs and OCs (non confidential)
Section 9 and 10 of the CSR (original and updated, if available) (non confidential)
Analysis of Alternatives (non confidential report)
Substitution Plan (non confidential summary)
Socio-Economic Analysis (non confidential report)
Joint Analysis of Alternatives and Socio-Economic Analysis (non confidential report)
Explanatory note
Additional information
Praxair Surface Technologies GmbH
Application type
Commission decided
Other consultations on the same/ similar use
Comments submitted to date
Download [ZIP]
Response to comments by applicant
Responses to RAC and SEAC requests by Applicant(s) (non confidential)
Compiled RAC and SEAC opinions
Minority positions
Adopted commission decision (OJ summary)
Authorisation decision

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