Registration Dossier
Registration Dossier
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EC number: 232-156-2 | CAS number: 7789-29-9
Endpoint summary
Administrative data
Description of key information
Additional information
Potassium hydrogen fluoride is a colourless crystalline solid.
The melting point is reported as 239.5°C.
No precise boiling point was detected. Potassium hydrogendifluoride will slowly decompose with elimination of HF at temperatures above 180°C. The rate of decomposition will rise with the increase of the temperature, having its maximum at 340°C. Above 400°C it is likely that the KHF2 is completely converted to potassium fluoride.
The density of potassium hydrogen fluoride is reported as 2.37.
The following results regarding the particle distribution were obtained (results of laser diffraction determination) for potassium hydrogen fluoride: mass median aerodynamic diameter (MMAD) mean value = 811 ± 12 µm.
The solubility of potassium hydrogen fluoride at 20°C is reported as 39.2 g/100 g water. Consequently, the solubility in water at 20°C is 392000 mg/L and it is considered to be very soluble (> 10000 mg/L).
Potassium hydrogendifluoride is not classified as flammable under the harmonised classification according to Annex VI of Regulation (EC) 1272/2008 [the CLP Regulation].
According to an accepted and validated procedure for assessing explosiveness and oxidising properties on theoretical grounds potassium hydrogen fluoride is not considered to be explosive nor oxidising.
The other endpoints were waived (vapour pressure, partition coefficient, surface tension, flash point, auto flammability, stability in organic solvents, dissociation constant and viscosity).
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