If I were you, I would dilute it to 40% or so, making it a non-fuming liquid, which is much easier and safer to handle. But still, with 40% acid you
have to be very careful. Getting it on your body will cause really serious health issues or even death.
One interesting thing might be to convert the acid to HBF4, using B2O3. Beware with the reaction, it is quite exothermic, slowly add B2O3 to the acid
in small portions. Try to use as precisely as possible the right stoichiometric amount of B2O3 and after the final addition, add 1% more of B2O3 to
assure that no free HF is present anymore. This slight excess of B2O3 will cause formation of a little mixed fluoro/hydroxo boric acids.
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