New Authorizations for Chromate Use in Aerospace, Automotive & Rail Applications

New Authorizations for Chromate Use in Aerospace, Automotive & Rail Applications

The European Commission has authorized the use of several chromate substances in the aerospace, automotive and rail sectors: pentazinc chromate octahydroxide, ammonium dichromate and chromium trioxide. 

Two of these chromate substances (ammonium dichromate and chromium trioxide) were included on the Authorisation List (Annex XIV) under the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) Regulation with a sunset date of September 21, 2017. The third substance, pentazinc chromate octahydroxide, was banned from the European Economic Area (EEA) on January 22, 2019. 

However, the European Commission announced it will grant these chemicals exemptions for specific uses, citing the socioeconomic benefits, which, “outweigh the risk to human health arising from the use of the substance,” and the fact that “there are no suitable alternative substances or technologies.”

Pentazinc Chromate Octahydroxide

The European Commission authorized Indestructible Paint Inc. to use pentazinc chromate octahydroxide (CAS No. 49663-84-5) for two purposes: the formulation of mixtures, and as a stoved epoxy primer to protect aircraft engine components in aerospace and aeroderivative applications against corrosion.

A review period for this authorization is scheduled for January 22, 2031.

Ammonium Dichromate

The European Commission authorized BAE Systems, Qioptiq Ltd. and Display Technologies Ltd. to use ammonium dichromate (CAS No. 7789-09-5) for two purposes: the production of holographic combiners for diffractive head-up displays used in military aircrafts and formulation of mixtures (BAE and Qioptiq), and the production of cathode ray tubes for heads-up displays used in military and civilian aircrafts (Display Technologies Limited).

A review period for this authorization is scheduled for September 21, 2021.

Chromium Trioxide

The European Commission authorized ZF Friedrichshafen AG to use chromium trioxide (CAS No. 1333-82-0) for functional chrome plating of piston rods in automotive and rail applications.

A review period for this authorization is scheduled for July 10, 2031.

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REACH Basics — Are Your Products in Scope? 

REACH affects the use and sale of almost every product in the EEA. It requires companies that manufacture or import chemicals into the EEA in quantities greater than one ton per year to register these substances with the European Chemicals Agency (ECHA). 

To comply with the regulation, companies must be able to prove the chemicals in their products can be safely used. The ECHA assesses registrations to determine whether the risks posed by a substance can be managed. Substances deemed too high-risk may face loss of market access or limits on use, or be required to submit to prior authorization.

How Assent Can Help

Ensuring products are REACH compliant requires dedicated attention and organization. Companies should obtain data on the full composition of products and determine whether in-scope chemicals (above the 0.1 percent weight by weight threshold) are present. Companies may also consider using a safer alternative substance in the production of future inventory. 

Assent’s REACH Module can collect and centralize supply chain data under one intuitive interface, and leverage automation workflows to improve communication with suppliers. To learn how our Product Compliance Suite can streamline your supply chain data collection and reporting processes, email

For more information on REACH Authorisation, view our webinar, European Union REACH Authorisations: Downstream User Tasks.