Greetings everyone, 

we have a researcher who will be using 70%-72% Perchloric acid, he is making a 1:1 mix with Glacial Acetic Acid for the hydrolysis of fish fats.  In either case, we have some concerns with this because we do not have a perchloric acid hood (separate issue).  Now, once the mix is made, the Perchloric acid will be approximately 35% to 36%, however, my concern is with the possibility of a spill and the resulting waste from a spill.  Neutralization first, yes, but then it is also recommended that the spill NOT be absorbed with any combustible such as paper towels etc.  I have thought perhaps diatomaceous earth, or a combination of neutralizer with diatomaceous earth, collect with standard non-metal dust pan then bag/tag the neutralized waste.

Does anybody have any experience with Perchloric Acid spills, neutralization and absorbents, and if so, what do you use?

thanks!