Registration Dossier
Registration Dossier
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EC number: 235-185-9 | CAS number: 12125-01-8
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
The water solubility of ammonium fluoride is reported to be 835 g/L H2O at 25°C, which is recalculated to 455 g/L (units of mass per volume of solution as specified in guidance documents). Thus ammonium fluoride can be considered as very soluble.
Key value for chemical safety assessment
- Water solubility:
- 455 g/L
- at the temperature of:
- 25 °C
Additional information
The CRC Handbook of chemistry and physics, 91st ed. (2010) reported a water solubility value for ammonium fluoride of 835 g/L H2O at 25°C. An earlier version of the same handbook (65th ed.) reported the water solubility of ammonium fluoride to be 1000 g/L H2O at 0°C.
In a review article by Rakov and Mel'nichenko (1984) the water solubility of ammonium fluoride is stated to be 45.38% at 25°C.
As the units for these different sources are different and the "Guidance on information requirements and chemical safety assessment - Chapter R.7a: Endpoint specific guidance" (ECHA, 2008) defines water solubility as the solubility of a substance in water which is specified in units of mass per volume of solution. We recalculated the value of the key study, being 835 g/L H2O at 25°C, and obtained a value for water solubility of 455 g/L. This value is in agreement with the 45.38% (i.e. 453.8 g/L) at 25°C given by Rakov and Mel'nichenko (1984).
Thus, ammonium fluoride can be considered as very soluble.
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