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Incorrect Thermal Testing

Incident

A development chemist suspected that the material he was making could be thermally unstable so he decided to heat a small sample (2ml) in a 50ml RB flask in an oil bath.   He monitored the temperature using a thermometer.

On heating to 150°C, he saw no appreciable temperature deviation from the oil bath, so he decided to carry out a distillation of the material on a 100ml scale

On heating to ca.145°C, the flask exploded (no one was injured).  Subsequent DSC testing showed that the material had a DSC onset temperature of around 95°C and a heat of decomposition of around 1200J/g

Extra Information

Poor data was given in the MSDS....

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