2021 GA Meeting May 12th, 14:00-15:30

2020 GA MEETING

 

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.

DETERMINATION OF PARTICLE SIZE DISTRIBUTION/ SiMn slag (Silicomanganese slag)/ OECD 110/GLP

Particle Size Distribution. Particle size data have been acquired using a procedure designed to comply with the European Commission technical guidance document Particle Size Distribution, Fibre Length and Diameter Distribution' (June 1996), which satisfies the requirements of OECD Guideline 110. On visual assessment, the test material was observed to be composed of a broad particle size range from approximately gravel sized pieces through to very fine dust. To represent a worst-case scenario for potential inhalation risk, the test material was sampled from the base of the container, where the finer fractions had settled, and the very largest particles were then removed from this subsample as not to skew the analytical results.

From this subsample, the percentage of test material with a particle size less than 100 µm was determined to be 3.5% by sieve analysis. This indicated that the test material was of a particle size that was essentially non-inhalable. It must be noted that this value may significantly overestimate the true fine particle fraction of the test material due to the sampling procedure, and also since the test material was observed to be physically brittle. Therefore, the fine particle size fraction may have been artificially increased by attrition of the sample during transportation to the test facility and also mechanical forces during the sieving procedure.

 

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

 

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