The density of Dimethyl Mercury is almost 3g/ml, so 0.1 mL is like 300 mg.
From https://en.wikipedia.org/wiki/Cyanide_poisoning
> A fatal dose for humans is on average 1.52 mg/kg of body weight
Assuming 80kg(175pounds), that's like 120mg of Cyanide.
There is probably even more nasty stuff.
well, easily. any organophosphorus stuff for example.