What Firebug said is straight out of SG . The whole Alchemy system is a boondoggle, until its revised an clarified it should simply be ignored.
Which pages in SG contain those rules? I can only find brewmaster witch/warlock who creates harmless drinks with contact trigger. So, if it can contain entertainment spell, it can contain also fireball? Only restriction seems to be a potion, which is not possible.
Page 210 the Side bar. That quick answer section right there sums up all the problem with Alchemy. Including 1 use per combat turn. Until that whole mess is cleaned up forget it.
"Preparations with a contact trigger affect the magician and
opponent alike after the magician completes the preparation
and stops touching the preparation. This is similar to the delay
from a hand grenade"
This effectively makes Contact trigger useless, other then as some kind of pressure sensor.
The Advanced meta magic versions are a little more forgiving but they are also drain heavy and even more costly to get into.
They Need to clean up that mess and make Alchemy viable. Healing potions should work fine, and would make alchemy viable.
But whoever is in charge of balance some how feels, Alchemy was too strong but RiM was just fine, it just blows me away.