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Boiling point

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boiling point
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because chemical change occurred during the melting point study
Justification for type of information:
A DSC thermal analysis was conducted under nitrogen atmosphere, after resetting the thermic background of the sample.First scan: -80° to 250°C, where it can be observed a) first peak is observed at -25.93°C that can be interpreted as a passage from the crystalliwn to the amorphous stateb) a second endothermic peak, with a maximum at 199.42°C which can be assumed to be a chemical rearrangement of the substance during melting. In fact the IR analysis of the substance before and after the scanning, especially in the range of vibrations below 1750 cm-1 shows a completely different spectrum, confirming the change in chemical composition.Boiling of the substance is therefore not applicable and adaptations of the information requirements as described in Column 2 of Annex VII of the REACH Regulation can be applied(see attached information)

Description of key information

not required

Key value for chemical safety assessment

Additional information

The thermal behaviour of the substance was tested by DSC from -80° to 250°C showing an endothermic process at 199.4°C before boiling with structural modification. Specific rules for adaptation as decribed in Column 2 Annex VII of the REACH Regulation can be applied and the boiling point determination does not need to be conducted (decomposition before melting).