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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

1.2 g/cm³ (ISO 1183 -1 / OECD TG 109 / EU method A.3); read-across: C8 -18 AAPB, C12 AAPB, Formamidopropylbetaine

Key value for chemical safety assessment

Relative density at 20C:

Additional information

No experimental data are available for the substance itself. However, reliable data are available for the closely related source substances C8 -18 AAPB, C12 AAPB and Formamidopropylbetaine.

The relative density D (4/20) of C8 -18 AAPB was determined to be 1.15 (study according to ISO 1183 -1).


The relative density D (4/20) of C12 AAPB was determined to be 1.20 (study according to ISO 1183 -1).


The density of Formamidopropylbetaine is 1.14 g/cm³ (1.14E3 kg/m³) at 20°C (OECD TG 109 / EU method A.3).


The density of the source substances is in the same range (1.14 to 1.2 g/cm³). Based on the available data, it can be assumed that the differences chain length distribution of the fatty acid chain have no or at the most a minor impact on density. Thus, a similar density can be assumed for the target substance Undecylenamidopropyl Betaine.