UK REACH Authorisation List: disodium octaborate

Closes 12 Aug 2022

Opened 17 Jun 2022


We are seeking evidence on the use of disodium octaborate in Great Britain and the potential impact that adding disodium octaborate to the UK REACH Authorisation List could have.

The Health and Safety Executive (HSE) provided a recommendation to the Defra Secretary of State that disodium octaborate is a priority substance for inclusion on Annex 14 of UK REACH (the Authorisation List) in December 2021. The Secretary of State, and Welsh and Scottish Ministers must now make a decision on whether it should be added to the Authorisation List.  That would mean that prior authorisation would be needed to use disodium octaborate, or place it on the market, after the specified sunset date.

This is a joint Call for Evidence, issued by Defra on behalf of the UK Government, the Welsh Government, and the Scottish Government. 

We are also running a parallel Call for Evidence relating to dicyclohexyl phthalate that is available at:


Why your views matter

Disodium octaborate is a substance of very high concern due to its risk to human health. Responses to this call for evidence will be used to inform the decision of the Secretary of State, Welsh and Scottish Ministers, on whether disodium octaborate should be added to the Authorisation List.

Give us your views


  • Charities/Voluntary Organisations
  • Environmental campaigners
  • Trade Unions
  • Industries and professional services
  • Environmental professional services
  • Business/Private Sector
  • Manufacturing Industry
  • SME businesses
  • Consultants


  • Natural environment
  • Chemicals and pesticides
  • Consultations
  • DEFRA Policy