2023 Mn REACH Conference September 26-28th Thon Hotel, City Centre, Brussels

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MARA's 2023 Mn REACH Conference is scheduled to take place on September 26-28 at the Thon Hotel City Centre, Brussels.

Speakers from the Manganese Industry, other Metal Consortia, European Metal Associations and Regulatory Experts will enlighten you on the short-term risks/threats on your businesses as well as your responsibilities under the Evaluation aspect of EU REACH


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ACUTE TOXICITY TO RAINBOW TROUT / FeMn slag (Ferro-manganese slag)/ OECD 203 / GLP

Introduction. A study was performed to assess the acute toxicity of the test item to rainbow trout (Oncorhynchus mykiss). The method followed that described in the OECD Guidelines for Testing of Chemicals (1992) No 203, "Fish, Acute Toxicity Test", referenced as Method C1 of Commission Regulation (EC) No. 440/2008.

Results. The 96-Hour LL*50 based on nominal loading rates was greater than 100 mg/l loading rate WAF and correspondingly the No Observed Effect Loading rate was 100 mg/l loading rate WAF.

It was considered unnecessary and unrealistic to test at loading rates in excess of 100 mg/l.

The test item contains manganese. The test concentrations were monitored by analysis of the test samples for manganese only.

Analysis of the fresh media at 0 and 72 hours showed measured concentrations of manganese to range from 0.616 to 6.67 mg/l. Analysis of the old media at 24 and 96 hours showed measured concentrations of manganese to range from 0.526 to 5.21 mg/l.

The dissolved test item may have been one or several components of the test item. Given that toxicity cannot be attributed to a single component or mixture of components but to the test item as a whole, the results were based on nominal loading rates only.

*LL = Lethal Loading rate

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


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