Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

1,4-Dimethyl-2-(1-phenylethyl)benzene was tested in a flow-through system in accordance with OECD Test Guideline 305 for 42 days with two concentration levels (1 ppb and 0.1 ppb). A stock solution used in the test was prepared without dispersant but direct dissolution in the test water. BCF values at steady state were determined as 540 for the higher and 620 for the lower concentration level.

In addition, data is available from a reliable QSAR model.

Bioaccumulation of 1,1’-DPE is not expected since the criterion for considering substances as being not bioaccumulative (i.e. unlikely to havea BCF > 2,000) are met as can be derived from BCF calculation: The BCF of 325 to 420 for 1,1’-DPE fits well within the lower range of calculated values for BCF. As can be expected a clear correlation exists between molecular weight and the BCF. No further testing is required.

For detailed read across rationale and justification see section 13, Read across document.