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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Administrative data

Link to relevant study record(s)

Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted because the substance is highly insoluble in water

Description of key information

Hydrolysis testing with the test substance is technically not feasible, as the test item has very low water solubility (ref. IUCLID Section 4.8. "Water solubility").

Key value for chemical safety assessment

Additional information

The performance of a hydrolysis as a function of pH test is scientifically not justified.

REACH Regulation (EC) No 1907/2006, Annex VIII, Sect.9.2, Col. 2, states as follows:

“ The study does not need to be conducted if the substance is readily biodegradable, or highly insoluble in water. ”

Since the test substance 1,1’-(1,1,2,2-tetramethylethylene)dibenzene is practically insoluble in water, testing of hydrolysis behaviour of the test substance is considered scientifically not justified.