REACH - Information gathering to assist future recommendations of priority substances for inclusion in Annex 14 (the Authorisation List) of UK REACH – 4,4’-bis(dimethylamino)-4”-(methylamino)trityl alcohol

Overview

Information gathering to assist future recommendations of priority substances for inclusion in Annex 14 of UK REACH

HSE is seeking GB specific information on 4,4’-bis(dimethylamino)-4”-(methylamino)trityl alcohol [with ≥ 0.1% of Michler's ketone (EC No. 202-027-5) or Michler's base (EC No. 202-959-2)], to assist with future prioritisation work for recommendations to the Authorisation List (Annex 14) of UK REACH. 

Interested parties are invited to submit comments on this substance within 3 months of the publication date.  Information submitted will be used to refine this assessment for consideration in future prioritisation work.

How to submit comments

Comments on the following substance can be submitted by accessing the online survey below:

Substance name: 4,4’-bis(dimethylamino)-4”-(methylamino)trityl alcohol [with ≥ 0.1% of Michler's ketone (EC No. 202-027-5) or Michler's base (EC No. 202-959-2)],

CAS Number: 561-41-1

EC Number: 209-218-2

This may include:

• General comments on the supporting document .
• Information on your position in the supply chain (e.g., manufacturer, importer, downstream user or importer of articles containing the substance)
• Information on use of the substance in GB including information on associated volumes.
• Information on the presence of the impurities Michler's ketone (EC No. 202-027-5) or Michler's base (EC No. 202-959-2).
• Information on alternatives and any challenges to substitution (where applicable).

The supporting document on 4,4’-bis(dimethylamino)-4”-(methylamino)trityl alcohol [with ≥ 0.1% of Michler's ketone (EC No. 202-027-5) or Michler's base (EC No. 202-959-2)], summarises the infomation currently available to HSE. This can be found in the ‘related documents’ section below.

Consultations close at 23:59 London time (BST) on 4 February 2026.

HSE is also seeking further GB-specific information on the reaction products of 1,3,4- thiadiazolidine-2,5-dithione, formaldehyde and 4-heptylphenol, branched and linear (RP-HP) [with ≥ 0.1% w/w 4-heptylphenol, branched and linear] to support future prioritisation work – please see REACH - Publication of HSE’s draft recommendation (2025) for Annex 14 (the Authorisation List) – RP-HP

If you require a more accessible format of this document, please send details to HSE.Online@hse.gov.uk and your request will be considered.

HSE’s Confidentiality and GDPR statements

Information provided in response to this consultation may be subject to publication or disclosure in accordance with the access to information regimes (these are primarily the Freedom of Information Act 2000 (FOIA), the General Data Protection Regulations (GDPR) and the Environmental Information Regulations 2004 (EIR)). Statutory Codes of Practice under the FOIA and EIR also deal with confidentiality obligations, among other things.

If you would like us to treat any of the information you provide as confidential, please make this clear in your response. Ideally, confidential information should be submitted using the functionality provided at the end of the process for attaching confidential documents. If we receive a request under FOIA or EIR for the information you have provided, we will take full account of your explanation, but we cannot give an assurance that confidentiality can be maintained in all circumstances.

An automatic confidentiality disclaimer generated by your IT system will be disregarded for these purposes. Requests for confidentiality should be made explicit within the body of the response.

HSE will process all personal data in accordance with the GDPR. This means that personal data will not normally be disclosed to third parties and any such disclosures will only be made in accordance with the Regulations.