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EC number: 206-330-3 | CAS number: 328-50-7
A preliminary thermogravimetric measurement was performed over a temperature range from room temperature to approx. 600 °C. Two steps were registered with maxima at 226 °C resp. 427 °C. A total mass loss of 86.3 % at the final temperature could be observed (mass change in the range until 360 °C: - 77.1 %; mass change in the range from 360 to 600 °C: -9.2 %). No significant mass loss occurred due to purging. The course of the thermogravimetric curve suggests decomposition of the test item. After cooling the residue looked black and shiny. The DSC measurements were performed twice in the temperature range from 20 - 400 °C. A sharp endothermic peak indicating a melting point could be observed (peak maximum: 119 °C /119 °C; extrapolated onset temperature: 115.20 °C/ 115.22 °C; rounded mean of both determinations: 115 °C). Upon further heating the DSC-curve showed no more sharp peaks but the typical fluctuating course of decomposition starting at approx. 180 °C. Reweighing after the measurement showed that the sample had lost 74.7 %/ 74.8 % of its mass. The residue was brown-black discoloured and bloated coming out of the 50 µm hole.
Melting point: 115°C, OECD guideline 102, GLP, RL1
CRC handbook of chemistry and physics: melting point: 115.5°C.
In a Study according to OECD guideline 102, GLP, the melting point of 2-oxoglutaric acid was determined to be 115°C. This result is in line with the published literature data.
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