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EC number: 281-689-7 | CAS number: 84012-44-2 Extractives and their physically modified derivatives such as tinctures, concretes, absolutes, essential oils, oleoresins, terpenes, terpene-free fractions, distillates, residues, etc., obtained from Triticum aestivum, Gramineae.
The TGA curve of the test item is shown in Figure 1 (attached). Starting at 275°C, the weight of the sample decreased significantly. At 419°C, the sample weight had decreased by 25%.
After the experiment, a light yellow molten residue remained in the sample container (original colour: white) and a yellow residue was observed on the lid of the sample container. The change of the colour indicated reaction and/or decomposition of the test item.
The DSC curve obtained with Experiment 1 is shown in Figure 2 (attached). During cooling, two exothermic peak between 20°C and -40°C were found (results are archived in the raw data). The effects were obtained due to crystallization of the test item. During heating multiple endothermic peaks were observed between -50°C and 75°C followed by an endothermic effect starting at 200°C. The extrapolated onset temperature of the first peak was -24.242°C and the peak maximum temperature of the third peak was 32.640°C. The endothermic effects were most likely obtained due to melting of the test item. The last endothermic effect was probably obtained due to reaction and/or decomposition of the test item.
After the experiment, a light yellow molten residue remained in the sample container (original colour: white). The change of the colour indicated reaction and/or decomposition of the test item. Based on this visual observation, it was found that the test item had molten and the change of the colour demonstrated reaction and/or decomposition of the test item.
In order to investigate the endothermic peaks, Experiment 2 was stopped directly after the third melting peak. Figure 3 (attached) shows the DSC curve obtained. The extrapolated onset temperature of the first peak was -24.316°C and the peak maximum temperature of the third peak was 32.941°C. After the experiment, a colourless molten residue remained in the sample container (original colour: white). It demonstrated that melting was the reason for the endothermic effects.
The melting temperature was determined as a melting range obtained from the average extrapolated onset of the first melting temperature (-24.3°C) and the average peak maximum of the last melting temperature (32.8°C).
The melting and boiling temperature of the test substance were determined by DSC.
The melting temperature ofthe test item was -24.3°C – 32.8°C (248.8K – 305.9K).
Reaction and/or decomposition of the test itemwas observed during DSC experiment at temperatures of > 200°C (> 423K). Boiling of the test item was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test item has no boiling temperature.
In this guideline (OECD 103) study, [conducted with GLP certification], the test substnce (EC 281-689-7) was found to decompose at >423 K at 1013 hPa.
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