[LazarusLong42]

Yep. Ethanethiol is ethyl mercaptan--both methanethiol/methyl mercaptan and ethanethiol/ethyl mercaptan are pretty pungent. In my lab we commonly use 2-mercaptoethanol (OH-CH[sub]2[/sub]-CH[sub]2[/sub]-SH), which is pretty bad itself, though in reality not as bad as TEMED (tetraethylmethylenediamine). Both of these we use in dealing with proteins, though we keep them in much smaller quantities than what Possum describes (<25 mL).

LL