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Physical & Chemical properties

Stability: thermal, sunlight, metals

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Description of key information

1st reaction: 
Onset temperature: 75 °C, Energy release: 20 J/g
 
2nd reaction:
Onset temperature: 185 °C, Energy release: 50 J/g
 
3rd reaction:
Onset temperature: 430 °C, Energy release: >320 J/g

Additional information

A study was conducted (BASF SE, SIK-Nr. 14/0912) according to OECD TG 113. Using the Differential scanning calorimetry (DSC) the thermal stability of the test item in a temperature range from 30 to 500 °C was investigated. Three exothermic reactions were observed. The first reaction was observed at an onset temperature of 75 °C and a peak temperature of 92 °C with a released heat amount of 20 J/g. The second reaction was observed at 185 °C with a peak temperature of 205 °C and an energy release of 50 J/g. The third reaction was observed at 430 °C with a peak temperature of 485 °C and an energy release of >320 J/g. The third reaction was not enclosed within the investigated temperature range.

 

In addition a supporting study was conducted (BASF AG SIK-NR 07/2054) according to DIN 51007 Thermal analysis; differential thermal analysis; principles to determine the thermal stability of the test item. Using the DSC the thermal stability of the test item in a temperature range from 30 to 500 °C under nitrogen atmosphere was investigated. Two exothermal reactions were observed. The first reaction was observed with an onset temperature of 70 °C, a peak temperature of 87 °C and with an energy release of 20 J/g. The second reaction was observed at 440 °C with a peak temperature of 470 °C and an energy release of >430 J/g. The second reaction was not enclosed within the investigated temperature range.

 

In conclusion, the results of the two DSC studies are comparable. In both studies the first reaction was observed below 100 °C with an identical energy release and a high energy release above 400 °C was observed. The slightly difference could be caused by the different test conditions (nitrogen cf normal atmosphere.).

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