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Physical & Chemical properties

Boiling point

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Description of key information

According to Column II of Annex VII, the boiling point study does not need to be conducted for solids which either melt above 300 °C or decompose before boiling.
The substance 4-Amino-5-hydroxynaphthalene-1,7-disulphonic acid is a solid at room temperature and it is reported to melt at temperature range of of 313.3- 317 °C .Hence, it is not feasible to determine boiling point and the endpoint was considered for waiver.

Key value for chemical safety assessment

Additional information

According to Column II of Annex VII, the boiling point study does not need to be conducted for solids which either melt above 300 °C or decompose before boiling.

The substance 4-Amino-5-hydroxynaphthalene-1,7-disulphonic acid is a solid at room temperature and it is reported to melt at temperature range of of 313.3- 317 °C .Hence, it is not feasible to determine boiling point and the endpoint was considered for waiver.