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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Dissociation constant

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

According to the "Guidance on information requirements and chemical safety assessment, Chapter R.7a: Endpoint specific guidance”, p. 173, the study does not need to be conducted if the substance cannot dissociate due to the lack of relevant functional groups. In this case the dissociation constant is irrelevant. 1,1’-DPE has no functional groups which can dissociate. Therefore testing is not justified.