Alas poor Condo.... can't catch a break...
Chemical King was difficult to write because (1) most comic book writers know precious little about chemistry (2) they were apparently reluctant to introduce into his repertoire any of the bizarre chemical potions that existed during the Silver Age. There were chemicals available that could bestow temporary (or permanent!) elasticity, shape-shifting, invisibility, super-bouncing, lycanthropy, and the full array of Kryptonian super-powers. (There were apparently several iterations of super-power chemicals, created-- sometimes by accident-- by Superboy, Supergirl, Luthor, the Phantom Zone criminals, and Kandorians. No doubt others.)
There were chemicals that could turn 'good' people evil and vice versa, turn any object green, cause super-plant-growth, or make feathers as heavy as lead.
That's just off the top of my head.
And as these were mostly organic in nature (that is, could be ingested by humans, mostly harmlessly) it is reasonable to believe that most could be manufactured from chemicals already existing in the human body, for one who had
complete control over chemical reactions.
I mean, aside from stimulating the brain to produce endorphins and cannabinoids.
And I don't even want to get into accelerating or decelerating glandular secretions.