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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Administrative data

Link to relevant study record(s)

Description of key information


Key value for chemical safety assessment

Relative density at 20C:

Additional information

For this endpoint, the read across between PWH/ammonium and PWH/sodium salt is valid.

The read across justification is attached on section 13 of the dossier.

Density has not been performed because based on Reach Regulation ANNEX VII column 2 "The study does not need to be conducted if the substance is only stable in solution in a particular solvent and the solution density is similar to that of the solvent. In such cases, an indication of whether the solution density is higher or lower than the solvent density is sufficient". In our case the solvent is Water, that cannot be completely removed.

Nevertheless a calculated value has been considered, that seems consistent with the molecular composition. In fact the presence of Chlorine atoms within the molecular chain lets estimate a density slightly more than water density.