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Physical & Chemical properties

Boiling point

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Description of key information

C8-18 AAPB: not identifyable due to decomposition of the test substance in the range between 208 and 280°C
C12 AAPB: not identifyable due to decomposition of the test substance in the range between 60 and 260°C

Key value for chemical safety assessment

Additional information

In studies conducted according to OECD Guideline 103, the boiling points of C8 -18 AAPB and C12 AAPB were investigated using differential scanning calorimetry (DSC). Boiling points were not identifyable due to decomposition of the test material in the range between 208 and 280°C (C8 -18 AAPB) and between 60 and 260°C (C12 AAPB). Based on these results it can be assumed that a weak chemical bond is present in the molecule which is unstable towards elevated temperatures. All AAPBs are similar in structure, contain all the same zwitterionic structure. They differ, however, by their carbon chain length distribution and the degree of unsaturation (<=20%) in the fatty acid moiety. The content of minor constituents in all products are comparable and differ to an irrelevant amount. Based on the available data, it can be assumed that chain length distribution and degree of unsaturation of the fatty acid chain have no or at the most a minor impact on this endpoint.