I could not find anything, but is it intended or maybe forgotten about that the new alchemy items get added to list of options Perpetual Infusions based on research field. Like the new Alchemical Bombs for Bomber or Any of the new Mutagen for the Mutagenist. Looking at the new Toxicologist research field it notes common trait items for it's options. Should this apply to the other research fields also. It would prevent need for errata later other book beside these 2 and future proof this ability.
Bomber and Mutagenist are future-proofed by not allowing future options. The APG includes some bombs that would be an issue to make at-will, and the CRB already excluded mutagens from that book.
They probably shouldn't need to worry about balancing every bomb released against unlimited uses.
For poisons, it's a lot safer to assume that common poisons aren't going to behave too differently from the APG options. They're also not going to work on things immune to poison, even if they're a bit out there, like the blight bombs.