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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Link to relevant study record(s)

Description of key information

According to an accepted and validated procedure for assessing explosion risk on theoretical grounds Potassium Hydrogen Fluoride is not considered to be explosive.

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

Examination of the chemical structure of the substance indicates it does not contain any of the characteristic groups associated with explosive properties. Although the substance contains a halogen, this is bound within a stable ionic structure and does not impart explosive properties to the material. The oxygen balance is not applicable to an inorganic substance, or to a substance that does not contain oxygen in its structure.

 

Determination of the melting point and boiling point of Potassium hydrogen fluoride by differential thermal analysis was conducted by Solvay Fluor GmbH (Küsters and Luitjens, 2012, REACH_KHF2_Melt_Boil) and indicated a melting point of 239.5°C followed by endothermic decomposition above 340°C. Examination of the output trace from the Differential Scanning Calorimeter in conjunction with the Thermal Gravimetry output trace confirmed there were no exothermic events, and the decomposition energy was recorded as approximately -324 J/g. An energy release value above +500 J/g can be taken as an indication that explosive behaviour is possible. These results indicate Potassium Hydrogen Fluoride is unlikely to possess explosive properties.

 

Potassium hydrogen fluoride has a harmonised classification according to Annex VI of Regulation (EC) 1272/2008 [the CLP Regulation], but it is not classified for explosive or oxidising properties. It can be predicted that the substance does not possess explosive properties.

 

The substance is considered to not possess explosive properties and it is concluded that potassium hydrogen fluoride is unlikely to undergo rapid decomposition with the production of gases or release of heat sufficient to cause damage to the surroundings, and therefore does not present a risk of explosion.

Justification for classification or non-classification

The substance is considered to not possess explosive properties and it is concluded that potassiumm hydrogen fluoride is unlikely to undergo rapid decomposition with the production of gases or release of heat sufficient to cause damage to the surroundings, and therefore does not present a risk of explosion. Potassium hydrogen fluoride has a harmonised classification according to Annex VI of Regulation (EC) 1272/2008 [the CLP Regulation], but it is not classified for explosive properties. It can be predicted that the substance does not possess explosive properties.