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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Link to relevant study record(s)

Description of key information

melting point/thermal decomposition: 268°C

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
268 °C

Additional information

In the Klimisch 1 non-GLP study from Kintrup (2012) the melting point of disodium (Z)-4-(9-octadecenylamino)-4-oxo-2(or 3)-sulphonatobutyrate was determined with the DSC method according to OECD 102 and EU method A.1. The test item did not show melting up to 268°C.Up to 268 °C the sample shows a weight loss of ca. 7 -9 weight%. From 268 °C the test item shows most probably a thermal decomposition with melting and evaporation of the decomposition components. A vaporization of significant parts of the test item cannot be completely excluded. In the temperature range between about 50°C and 240 °C the test item shows several partly reversible endothermic effects. This effect is possibly evaporation of sub components and / or solid– solid phase transformation. This effect is not the melting of the test item (main component) which was verified by subsequent tests with the Kofler-heating bank and with the melting in a capillary.

For the risk assessment a melting point of 268°C will be used.

This information is considered to be relevant and reliable for the further risk assessment.