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Physical & Chemical properties

Explosiveness

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Description of key information

Based on structural increments, no explosive properties are expected for Vat Indigo Potassium Salt. Tests with the evaporated nearly dry substance showed no flammability or self-ignition properties. The Differential Scanning Calorimetry showed an exothermic reaction with < 200 J/g released heat.

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

Based on structural increments, no explosive properties are expected for Vat Indigo Potassium Salt. Tests with the evaporated nearly dry substance showed no flammability or self-ignition properties. The Differential Scanning Calorimetry (DSC; see 4.2 Melting point) showed an exothermic reaction with < 200 J/g released energy.

Tests with its oxidised environmentally stable form Indigo showed a released energy of 100 J/g in the DSC.

Based on structural increments and the above data, indigo and vat indigo potassium salt are not explosive.

Justification for classification or non-classification