Guidelines for Testing of Chemicals are periodically reviewed and updated in the light of scientific progress.
First commenting round for the draft revised Test Guideline 201: Freshwater Alga and Cyanobacteria, Growth Inhibition Test
- Submission period
- 3 Dec 2025 - 28 Jan 2026
Background public consultation
Project description
This revision includes:
- Including the diatom strain Mayamaea permitis (NIES-2724) as new recommended species to replace Navicula pelliculosa (UTEX664) which is no longer available,
- Provide an update of scientific name for the recommended strains (Pseudokirchneriella subcapitata, and Anabaena flos-aquae),
- Include a clarification on the calculation of the coefficient of variation (CV) of the section-by-section specific growth rates.
How to contribute
The draft new Test Guideline is currently under a commenting round by the Working Party of the National Coordinators of the Test Guidelines Programmes and open for comments from the public at the same time. Interested parties are invited to contact their National Coordinators at least a week before 22 December 2025.
