Digging back into ACS journals this week, I came across this warning in a 1976 Journal of Chemical Education paper (DOI: 10.1021/ed049p583) that discussed preparing perbromate by bubbling fluorine gas through an alkaline bromate solution:
There are problems associated with this preparative method for which precautions must be taken (8). For example, some fluorine escapes from the alkaline solution which results in small explosions above the reacting mixture, and the action of fluorine on Teflon sometimes results in fires.
Reference 8 took me to an Inorganic Chemistry paper from 1969 (DOI: 10.1021/ic50072a008):
Although most of the fluorine is absorbed by the base, enough escapes to make it imperative that the reaction be carried out in a well-ventilated fume hood. The reaction is not smooth, and small explosions may take place in the vapor above the solution. Under no circumstances should the apparatus be left to run unattended.
I wonder what exactly “small” means in the context of “small explosions.” Anyone want to share their experiences with handling fluorine?