No, I think its gone. I can still smell it in the specific area where n-butyric anhydride was used a couple of times for different things within the last few days, but not here and now, in an outbuilding, or when going from the stink-zone through fresh air to the outbuilding.
I think any traces ON me (of the diluted acid, I'd have known about it had I got the anhydride on myself, although to that end I wear long, elbow-length butyl rubber gloves, and where needed, sometimes two pairs, one over the other, with duct tape sealing the gap between labcoat (I favour an old, old leather trench that is too worn and tatty to wear as a general purpose coat, but unlike cotton labcoats, things both have greater difficulty soaking into the leather, and its also thick, so anything corrosive would have to burn through it, before got to my double-layer of gloves.
Sometimes, I'll wear one pair on my hands, put the coat on, and sandwich the other set of gloves over that, to give an additional layer of protection, if working with anything I REALLY would not want contacting my skin and/or burning it off. And especially with things of that nature that give off nasty, highly corrosive fumes/vapor. So if one glove goes and/or gets burnt through, or ends up with a nick in it (not a bad practice to pre-cut a few lengths of duct tape for some things in case of emergencies. Whilst of course I do not have anything to do with such myself, thats a tip I picked up off reading of the practices of those virologists who work with the nastiest of the nasty members of the bad actors, so that if they suffer the slightest nick in their gloves, they can straight away slap a piece of tape over the damaged area and seal the penetrated area of the outer glove)
Makes sense for those who work with deadly pathogens for which there is no cure, such as the human-lethal filoviruses (marburg, and [barring the airborne Reston strain of ebolavirus, which is,somewhat surpising), and I see no good reason not to adopt the same practice for chemistry experiments involving particularly dangerous substances, especially those that have carcinogenic/and-or/mutagenic properties. Which needless to say, I would rather avoid coming into contact with, even despite all precautions, not that I am by far the worlds most talented chemist/biologis, even the best of the most careful can still have accidents, some with awful consequences.
As the saying here goes 'an ounce of prevention is worth a pound of cure'.
