UK HSE: Upcoming biocides active substance expiry dates

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

31 January 2025

• 1-(4-chlorophenyl)-3-(2,6- difluorobenzoyl)urea (diflubenzuron) (CAS 35367-38-5 EC 252-529-3) in product type 18

  
  

• Formaldehyde (CAS 50-00-0 EC 200-001-8) in product type 2

  
  

• Powdered corn cob (CAS N/A EC N/A) in product type 14

  
  

• Thiamethoxam (CAS 153719-23-4 EC 428-650-4) in product type 18

30 April 2025

• 4-bromo-2-(4-chlorophenyl)-1-ethoxymethyl-5-trifluoromethylpyrrole-3-carbonitrile (chlorfenapyr) (CAS 122453-73-0 EC 602-782-4) in product type 8

31 October 2025

• Lauric acid (CAS 143-07-7 EC 205-582-1) in product type 19

  
  

• Synthetic amorphous silicon dioxide (nano) (CAS 112926-00-8 EC 231-545-4) in product type 18

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, HSE will contact you about cancelling or revoking your authorisation or approval. You will have an opportunity to submit comments or additional information and HSE will take account of these when finalising our decision.