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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The relative density and the bulk density are 960 and 600 g/l resp. 

Key value for chemical safety assessment

Relative density at 20C:

Additional information

The difference in bulk and relative density differ considerable and is due to the production process of the Tonalid (AHTN). Since AHTN melts around 54oC, the relative density can be determined by melting the AHTN prior to the determination. Strictly speaking, the relative density should be between 600 and 960 g/l, but it should be closer to the molten density than to the bulk density. Hence the 960 g/l has been taken forward in the registration as the relative density.

The relative density is less than one and the water-solubility of AHTN very low. Consequently, the substance is likely to float, which is relevant information for the risk assessment.