Adiabatic Dewar

Energy of decomposition (in range 160-230°C) measured as 1.36 kJ/g by DSC, and Tajt24 was determined as 120°C by adiabatic Dewar tests, with an apparent energy of activation of 131 kJ/mol. 

Tait24 was determined as 250°C by adiabatic Dewar tests, with an apparent energy of activation of 185 kJ/mol. 

Though distillable at considerably reduced pressure, phenyl azide explodes when heated at ambient pressure, and occasionally at lower pressures [1]. The energy of decomposition has been determined (130-260°C) as 1.36 kJ/g by DSC, and Tait24 was determined as 87°C by adiabatic Dewar tests, with an apparent energy of activation of 119 kJ/mol [2], It is best stored as a 3M solution in toluene. Exposure to heavy metals should be avoided [3],... 

Delays in working up the crude product caused violent explosions during attempted vacuum distillation. An alternative method of crystallisation is described [1]. There is a very high rate of pressure increase in exothermic decomposition [2], Energy of decomposition (in range 180-420°C) measured as 2.19 kJ/g by DSC, and Taj,24 was determined as 147°C by adiabatic Dewar tests, with an apparent energy of activation of 168 kJ/mol [3], The initial decomposition temperature by ARC was 166°C. 

Tait24 determined as 148°C in adiabatic Dewar tests with apparent energy of activation of 123 kJ/mol. 

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