General Assembly Meeting Thursday, May 5th 10:00 – 13:00

General Assembly Meeting - 2022

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/ Mn metal (Manganese metal)/ OECD 201/ GLP

Introduction. A study was performed to assess the effect 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 0.3 of Commission Regulation (EC) No 440/2008.

Results. Exposure of Desmodesmus subspicatus to the test item gave the following results expressed in terms of %v/v saturated solution:

Response Variable

EC50

(% v/v Saturated Solution)

No Observed Effect Concentration (NOEC)

(% v/v Saturated Solution)

Lowest Observed Effect Concentration (LOEC)

(% v/v Saturated Solution)

Growth Rate 86 50 100
Yield 56 50 100

Analysis of the test preparations at 0 hours showed measured test concentrations to range from 0.33 to 5.3 mg/l. At 72 hours, analysis of the test preparations showed measured test concentrations to range from 0.29 to 5.3 mg/l. Given that no decline in measured concentration was observed over the test period it was considered appropriate to calculate the results based on the mean measured test item concentrations.

Exposure of Desmodesmus subspicatus to the test item gave the following results based on the mean measured test concentrations expressed in terms of the test item:

Response Variable

EC50    (mg/l)  

No Observed Effect Concentration (NOEC)

(mg/l)

Lowest Observed Effect Concentration (LOEC)

(mg/l)

Growth Rate 4.5 2.5 5.3
Yield 2.8 2.5 5.3

 

To obtain the full study, please contact: reach@manganese.org

 

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