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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Sediment toxicity

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Administrative data

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Description of key information

In accordance to Regulation (EC) No. 1907/2006, Annex X, Column 2, 9.5.1, as the RCR sediment is < 1 no further effects of methylcyclohexane on sediment organisms need to be investigated and a long-term test is therefore not required.

Key value for chemical safety assessment

Additional information

In accordance with Regulation (EC) No 1907/2006, Column 2 of Annex X, section 9.5.1 long-term toxicity tests on sediment organisms does not need to be investigated if the outcome of the chemical safety assessment shows no indication of risk on sediment organisms from exposure to the substance in question. In a first step, the sediment PNEC for methylcyclohexane has been derived using aquatic PNECs and the equilibrium partitioning method (EqP). The risk characterization ratio (RCR) has demonstrated that there is no indication of risk i.e. PEC/PNEC sediment < 1 from current exposure conditions to methylcyclohexane.

Furthermore, considering the high volatility, the substance is expected to be rapidly removed within sewage treatment plants/ environment. As a consequence, chronic exposure of sediment organisms is unlikely to occur. In addition, due to the high volatility, it is unlikely that a constant exposure concentration could be achieved in sediment toxicity tests.

In conclusion, in accordance to Regulation (EC) No. 1907/2006, Annex X, Column 2, 9.5.1, as the RCR sediment is < 1 no further effects of methylcyclohexane on sediment organisms need to be investigated and a long-term test is therefore not required.