Biocides: Upcoming GB active substance expiry dates
Certain biocidal products must be phased off the GB market

 

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HSE ebulletin

Issued: 24 March 2026

This ebulletin contains information on regulating biocides in Great Britain (GB).

Upcoming GB active substance expiry dates

Biocidal products must be phased off the GB market.

The active substance/product type combinations listed are due to expire under the GB Biocidal Products Regulation (GB BPR) on the following dates:

30 June 2026

  • Bacillus sphaericus 2362, serotype H5a5b, strain ABTS1743 (CAS 143447-72-7 EC N/A) in product type 18
  • Bacillus thuringiensis subsp. israelensis, strain SA3A (CAS N/A EC N/A) in product type 18


30 September 2026

  • (E)-1-(2-chloro-1,3-thiazol-5-ylmethyl)-3-methyl-2-nitroguanidine (clothianidin) (CAS 210880-92-5 EC 433-460-1) in product type 18
  • N-(trichloromethylthio)phthalimide (folpet) (CAS 133-07-3 EC 205-088-6) in product type 7


30 June 2027

  • epsilon-momfluorothrin (CAS 1065124-65-3 EC N/A) in product type 18
  • L-(+)-lactic acid (CAS 79-33-4 EC 201-196-2) in product type 1
  • polyhexamethylene biguanide hydrochloride with a mean number-average molecular weight (Mn) of 1600 and a mean polydispersity (PDI) of 1.8 (PHMB (1600;1.8)) (CAS 27083-27-8  / 32289-58-0 EC N/A) in product type 4


Once the approvals expire, the active substances will no longer be able to be used in biocidal products of the relevant product types in GB.

In addition articles treated with such products will no longer be able to be placed on the market in GB.

If you hold an affected GB BPR product authorisation or Control of Pesticides Regulations (COPR) product approval, we will contact you about cancelling or revoking your authorisation or approval. You will have an opportunity to submit comments or additional information and we will take account of these when finalising our decision.

If you are aware of any disproportionate negative impacts that are likely to arise from the expiry of the active substance/product type combinations listed, please contact us.

Stakeholders should note that biocides are in scope of the Sanitary and Phytosanitary (SPS) Agreement currently being negotiated between the UK and the EU. Once negotiations on the SPS Agreement have concluded, HSE will communicate further on any implications the Agreement has for the sector.

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