October 2025 Bulletin –
Staying ahead of regulatory deadlines
An effective compliance strategy can mean the difference between a smooth product authorisation and a disruptive withdrawal from the market. For companies placing biocidal products on the market in Great Britain and the EU, several important deadlines for active substance renewals and approvals are fast approaching. Missing these cut-offs could result in product suspensions, market withdrawals, or the need for costly last-minute remedial action.
At CEMAS, we recognise that high-quality data underpins every successful regulatory submission. With over 35 years of experience in analytical testing, we provide the robust, regulatory-ready data that dossier owners and consultants depend on. Our role is to ensure the scientific foundation of your dossiers is accurate, reliable and fully aligned with GxP standards.
Upcoming Key Deadlines and Expiries
December 2025
- Biphenyl-2-ol – PTs 1, 2, 4, 6, 13 (EU/NI renewal)
- Epsilon-momfluorothrin – PT 18 (EU/NI renewal)
- L-(+)-lactic acid – PT 1 (EU/NI renewal)
- CMIT/MIT mixture – PTs 2, 4, 6, 11, 12, 13 (EU/NI renewal)
- PHMB (1600;1.8) – PT 4 (EU/NI renewal)
- Copper flakes – PT 21 (GB & EU expiry)
- Tolylfluanid – PT 21 (EU/NI expiry)
- Dichlofluanid – PT 6 (EU/NI expiry)
March 2026
- Peracetic acid – PTs 1,6 (GB renewal submissions due)
May 2026
- Hydrogen peroxide – PT 11 (Key BPR application deadline)
June 2026
- 2-bromo-2-(bromomethyl)pentanedinitrile (DBDCB) – PT 6 (EU/NI renewal)
- 2-octyl-2H-isothiazol-3-one (OIT) – PT 8 (EU/NI renewal)
- Ampholyt 20 – PTs 2, 3, 4 (EU/NI renewal)
- Bacillus amyloliquefaciens strain ISB06 – PT 3 (EU/NI renewal)
- Biphenyl-2-ol – PT 3 (EU/NI renewal)
- Cyromazine – PT 18 (EU/NI renewal)
- Reaction mass of didecyl-methylammonium propionates – PT 8 (EU/NI renewal)
- Bacillus thuringiensis subsp. israelensis, strain SA3A – PT 18 (EU/NI expiry)
August 2026 (GB renewal submissions due)
- Citric acid – PT 2
- α-cyano-4-fluoro-3-phenoxybenzyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate – PT Y
September 2026
- Fludioxonil – PTs 7, 9, 10 (GB renewal submission)
- Folpet – PT 7 (EU/NI expiry)
- Clothianidin – PT 18 (EU/NI expiry)
November 2026 (GB expiries)
- Propiconazole – PT 7
- DCPP – PTs 1, 2, 4
- Potassium sorbate – PT 8
December 2026
- Piperonyl butoxide (PBO) – PT 18 (EU/NI renewal)
- MBIT – PT 6 (EU/NI renewal)
- Peracetic acid – PTs 11, 12 (EU/NI renewal)
1 February 2027 (EU/NI approvals)
- MIT – PT 6
- Peracetic acid (from 1,3-diacetyloxypropan-2-yl acetate + hydrogen peroxide) – PT 2
How CEMAS supports the Biocides Sector
- Regulatory-ready analytical testing – generating high-quality phys-chem data to underpin active substance and product submissions.
- Long-standing expertise – over three decades supporting biocide, agrochemical and life sciences industries with trusted laboratory services.
- GxP-compliant data – ensuring that every dataset meets the highest standards for use in regulatory dossiers.
With critical biocide deadlines approaching, the quality of your data will be key to meeting regulatory expectations. CEMAS partners with regulatory consultants to deliver the scientific evidence needed to support compliance and keep products on the market.
Contact us today to discuss how our analytical services can strengthen your upcoming submissions.