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Physical & Chemical properties

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Physical state: Formamide is a slightly viscous, colourless liquid which is odourless or at industrial grade with a faint odour of ammonia.


Melting point: 2.6 °C


Boiling point: 218.3 °C (decomposition starts above 140 °C)


Density: 1.13 g/cm³ at 20 °C


Particle size distribution: Formamide is marketed and used as liquid.

Vapour pressure: 0.06 hPa at 20 °C


Partition coefficient: -0.82 at 25°C


Water solubility: 1E06 mg/L at 25 °C


Surface tension: Based on the chemical structure, no surface activity is expected.


Flash point: 152 °C at 1013 hPa


Auto flammability: > 500 °C


Flammability: Not flammable; based on the molecular structure and experience in use formamide has no pyrophoric properties; it does not react with water under formation of flammable  gases.


Explosiveness: Not explosive; Examination of the structure indicates that there are no groups associated with explosive properties.

Oxidising properties: Not oxidising; due to the structural composition of the substance it is not considered to be oxidising.


Stability in organic solvents and identity of relevant degradation products: In accordance with column 1 of Annex IX, the study does not need to be conducted if the stability of the substance is considered to be critical. Formamide is not considered as critical.


Dissociation constant: pKa at 20/25°C: -0.48


Viscosity: 3.764 mPa*s at 20 °C