That's an acutely toxic simple anion (CN-), in random things like e.g. apple or peach seeds (#evolution) and commonly byproduct of breaking down more complex atoms.

Versus C3H8NO5P (with additives to multiply the effectiveness), which sounds less inherently safe...

Its not the single cigarette that kills you :P

btw cody's lab is an really fun scientific youtube channel. his series on extracting metals is really fun.