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Physical & Chemical properties

Melting point / freezing point

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Description of key information

Weight of evidence approach based on four peer-reviewed data from handbooks (three times -41.6, -42 deg C). 

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
232 K

Additional information

Although it could not be confirmed that the melting point values result from different sources it can safely be concluded that the melting point of Nitric acid is below - 20 deg C being the lower cut-off value below which a melting point needs not to be determined (ECHA endpoint specific guidance R.7A).