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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

The substance is expected to be chronically harmful to aquatic invertebrates (Category chronic 3).

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Dose descriptor:
Effect concentration:
0.754 mg/L

Additional information


In Article 13 of Regulation (EC) No 1907/2006, it is laid down that information on intrinsic properties of substances may be generated by means other than tests, provided that the conditions set out in Annex XI (of the same Regulation) are met.

According to Annex XI of Regulation (EC) No 1907/2006 (Q)SAR results can be used if (1) the scientific validity of the (Q)SAR model has been established, (2) the substance falls within the applicability domain of the (Q)SAR model, (3) the results are adequate for the purpose of classification and labeling and/or risk assessment and (4) adequate and reliable documentation of the applied method is provided.

For the assessment of the DMCHA (CAS 98-94-2) (Q)SAR results were used for the estimation of the acute toxicity to aquatic invertebrates. The criteria listed in Annex XI of Regulation (EC) No 1907/2006 are considered to be adequately fulfilled and therefore the endpoint(s) sufficiently covered and suitable for risk assessment.

The Expert Judgement (other information) was performed in order to support the evidence, that the substance is not expected to be chronically harmful to aquatic invertebrates. Further experimental studies are not provided.



Long-term toxicity of DMCHA to Daphnia magna was evaluated by the QSAR Toolbox v4.5 calculation model. The 21-d EC10 was determined to be 0.754 mg/L (BASF SE, 2022). The calculation was performed with the Trend analysis method and the substance was within the applicability domain of the calculation model. This data are supported by a QSAR calculation with KATE2020, which esimated a 21d NOEC for Daphnia magna of 0.81 mg/L (BASF SE, 2022).