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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Description of key information

The hydrolysis of HfCl4 has been studied in a test complying with OECD guidance and rate with reliability 1. The experiment showed that the reaction occurred immediately and the stabilization of the reaction is showed by the pH and also the chloride content,  which did not vary at all after the reaction. The instantaneous hydrolysis was seen by eye with a precipitate formation that could demonstrate the formation of HfO2, a very insoluble compound. The key value for assessment is then set to a minimum.

Key value for chemical safety assessment

Additional information