Fluoroantimonic acid

Colorless liquid

Liquid

2.89 g · cm -3

19 hPa ( 18 ° C)

Risk

Template: Infobox chemical / molecular formula search is not possible

Fluorine - antimony acid, which is counted to the superacids, is one of the strongest acids known. It is a mixture of the strong Lewis acid is antimony (V ) fluoride and the medium-strong Brønsted acid hydrogen fluoride in different proportions. Since one can not directly measure the acid strength, it is determined by the Hammett acidity function. It has a mixture, present in the SbF5 and HF in a ratio of 1:200, an H0 value of about -21. For larger amounts of SbF5 the H0 value continues to drop down to the minimum value of -31.3, which is present at a mixing ratio of 1:1. ( Pure sulfuric acid has an H0 value of -11.9 and is therefore several trillion times weaker acidic. )

Due to their strength can fluorine - antimony acid as the similar magic acid, contains many substances, especially hydrocarbons protonate. This will be divided into small molecules and are then soluble in many organic solvents.