A virtual (Zoom) and face-to-face meeting in Paris, France
followed by Lunch
Other Logistical information to follow nearer the time
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The 2020 GA meeting which normally takes place in May was postponed to November 4th due to the global pandemic. The November 4th meeting which was virtual saw 20 attendees and lasted an hour as most of the GA mandated task/decisions were addressed by way of votes prior to the meeting. Chaired by Interim Chairman Dr Bernd Friede, the meeting though brief was effective with some key decisions taken as follows:
Some highlights:
- Executive Committee: A new Executive team was endorsed with the 2nd Vice-Chairman becoming the Chairman and Secretary General maintained to ensure continuity
- Non-EU letter of Access Fees: Letter of Access fees and administration fees for non-EU REACH-Like regulations per substance, per legal entity for non-MARA members was established
- Members involvement in Non-EU regulations: MARA members wishing to register substances in non-EU REACH-like regulations will only pay administration fees as they own the data generated by MARA
- Technical update: Three dossiers updated this year lead to a new classification for manganese based UVCB’s
- 2020 Workplan and budget were ratified in Q1, 2020 via round robin votes.
ALGAL GROWTH INHIBITION TEST/ MnSO4 (Manganese Sulphate Monohydrate)/ OECD 201/ GLP
Introduction. A study was performed to assess the effects of the test item on the growth of the green alga Desmodesmus subspicatus. The method followed that described in the OECD Guidelines for Testing of Chemicals (2006) No 201, "Freshwater Alga and Cyanobacteria, Growth Inhibition Test", referenced as Method C.3 of Commission Regulation (EC) No 440/2008.
Results. Exposure of Desmodesmus subspicatus to the test item gave the following results:
| Response variable |
EC50 (mg/l) |
95% Confidence Limits (mg/l) |
No Observed Effect Concentration (NOEC) (mg/l) |
Lowest Observed Effect Concentration (LOEC) (mg/l) |
| Growth rate | 61 | * | 1.0 | 3.2 |
| Yield | 9.1 | 7.1 - 12 | 1.0 | 3.2 |
* It was not possible to calculate 95% confidence limits for the ErC50 value as the data generated did not fit the models available for the calculation of confidence limits.
Analysis of the test preparations at 0 and 72 hours showed measured test concentrations ranging from 90% to 123% of nominal, thus the results are based on nominal test concentrations only.
To obtain the full study, please contact: reach@manganese.org.