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EC number: 695-797-0 | CAS number: 93601-86-6
TGA EXPERIMENT (PRELIMINARY TEST)
Starting at 275°C, the weight of the sample decreased significantly. At 309°C, the sample weight had decreased by 25%.
After the experiment, a brown/black molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item.
DSC EXPERIMENT 1
An endothermic peak directly followed by an exothermic effect was observed between 250°C and 309°C. The extrapolated onset temperature of the endothermic peak was 275.948°C. The endothermic effect was most likely caused by melting of the test item. The exothermic effect was ascribed to reaction and/or decomposition of the test item. After the experiment, a yellow/green molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item. Based on this visual observation, it was concluded that the test item had molten and that the change of the colour demonstrated reaction and/or decomposition of the test item.
DSC EXPERIMENT 2
In order to investigate the melting peak, in Experiment 2 heating was stopped directly after the melting peak. The extrapolated onset temperature was 275.897°C. After the experiment, a white molten residue remained in the sample container. It demonstrated that melting and most likely reaction and/or decomposition were the reasons for the endothermic effect.
DSC EXPERIMENT 3
In order to investigate reaction and/or decomposition during melting, a lower heating rate of 5°C/minute was used in the Experiment 3. The extrapolated onset temperature was 274.566°C. Based on the shape of the observed effects it was concluded that reaction and/or decomposition occurred during and after melting of the test item. Since a lower heating rate was applied, the extrapolated onset temperature was not used for calculation of the melting temperature. After the experiment, a yellow/green molten residue remained in the sample container.
The melting temperature was determined as the mean extrapolated onset temperature of Experiment 1 and Experiment 2.
Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.
The melting temperature of the substance was determined in duplicate obtaining a mean value of 275.9°C.
Reaction and/or decomposition of the substance started during melting.
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