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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Description of key information

The melting and boiling temperature of dinonylnaphthalenesulphonic acid (DNNSA) and Barium bis(dinonylnaphthalenesulphonate) (BaDNNSA) were determined using DSC. The melting temperature (glass transition) of the acid was -18°C (255K). For Ba DNNSA reaction and/or decomposition of the  substance was observed. Based on structural similarities it is expected that ZnDNNSA decomposes before melting. No value for the melting point can be assessed. 

Key value for chemical safety assessment

Additional information

The results on Barium bis(dinonylnaphthalenesulphonate) were chosen for the read-across, because this salt is a solid like zinc bis(dinonylnaphthalenesulphonate), while the acid is a liquid at room temperature.