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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Physical & Chemical properties

Water solubility

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Description of key information

Water solubility of 4-aminoazobenzene-3, 4’-disulphonic acid is estimated to be 1000000 mg/L at 25 deg C which indicates that the substance is very soluble in nature.

Key value for chemical safety assessment

Water solubility:
1 000 000 mg/L
at the temperature of:
25 °C

Additional information

On the basis of prediction using EPI MPBVP v1.43 (2011), Water solubility of 4-aminoazobenzene-3, 4’-disulphonic acid is estimated to be 1000000 mg/L at 25 deg C which indicates that the substance is very soluble in nature.

In a report given by Center for Chemical Hazard Assessment Syracuse Research Corporation (1981), 4 aminoazobenzene- 3, 4-disulfonic-acid was determined to be soluble in hot water.

In a Syracuse Research Corporation data base (2016), Benzenesulfonic acid, 2 amino 5((4 sulfophenyl) was determined to be 124 mg/L at 25 deg C which indicate that the substance is slightly soluble in water.

Therefore, on the basis of above available data, 4-aminoazobenzene-3, 4’-disulphonic acid was very soluble to in hot water.