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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Physical & Chemical properties

Water solubility

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Administrative data

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Description of key information

Solubility values from litterature (expressed as aluminium ammonium (bis)sulfate hydrated):
at 20°C = 112 g/L (mean of 5 data; SD = 12 g/L)
at 25°C = 120 g/L (mean of 2 data)

Key value for chemical safety assessment

Water solubility:
107 g/L
at the temperature of:
20 °C

Additional information

Eight litterature references were found, none of which being sufficient enough to be assigned as a key study, but providing consistent results. As original values are expressed in different units, they will be converted below in g/L expressed as hydrated ammonium aluminium sulfate, to allow comparison:

Hostomska 2006: 11.5 %m/m at 25°C eq. to 121 g/L

Nyvlt 2001: 11.19 mass% at 25°C eq. to 118 g/L

Zuziova 1995: 5.2 mass% at 20°C eq. to 104 g/L

Mullin 1982: at 20°C 104.6 g/L

(Baikowski) internal CofA 2009: 110 g/1L at 20°C eq. to 103 g/L

Ullmann 1985: at 20°C 117 g/L

Drugs handbook 2002: 14.3g/100mL at 20°C eq. to 132 g/L

HSDB 2005: (T not specified) 130 g/L

(conversion were made assuming MW of 237.1, 453.3 and 906.6 g/mol for the ammonium aluminium sulfate, expressed as anhydrous, 12 H2O and 24 H2O (double salt) respectively; density of the saturated solution was taken from Mullin 1982, i.e. 1.0464 g/cm3 at 20°C; the value of 1.054 g/cm3 at 25°C was interpolated as the mean of density at 20°C and at 30°C (1.0613 g/cm3); density of the solid is the key value retained under point 4.4 unless a value is provided in the same source than solubility).

The arithmetic mean of the five results at 20°C will be retained as the key value. The mean at 25°C is provided for information. The HSDB value will not be considered as temperature is not specified, but the magnitude of order is consistent with the previous data.