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Physical & Chemical properties

Melting point / freezing point

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Description of key information

The melting point of α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4) by the capillary method was found to be 208oC at an atmospheric pressure of 977.8 hPa. There was no decomposition & sublimation observed of α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol at this melting point. The supporting study reports a lower melting point but for the purpose of chemical safety assessment, the value of the key study shall be used.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
208 °C

Additional information

The melting point of α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4) by the capillary method was found to be 208oC at an atmospheric pressure of 977.8 hPa. There was no decomposition & sublimation observed of α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol at this melting point. The supporting study reports a lower melting point but for the purpose of chemical safety assessment, the value of the key study shall be used.