Marginally related, the case of Karen Wetterhahn: http://en.wikipedia.org/wiki/Karen_Wetterhahn

Wetterhahn, a specialist in toxic metals, was accidentally poisoned in her lab by a few drops of the toxic, colorless compound, which penetrated her protective glove... Wetterhahn recalled that she had spilled several drops of dimethylmercury from the tip of the pipette onto her latex gloved hand. Tests later showed that this can rapidly permeate different kinds of latex gloves and enter the skin within about 15 seconds