Treasure for low level alchemist

[Cyrad]

What's some good treasure to give a level 4-5 alchemist?

I mean, spellcasters are pretty easy. Just give them pearls of power, rods, scrolls, or something. Alchemists, not so much. Giving discoveries is cool, but the alchemist list is pretty limited. He doesn't have infusions and doesn't have that ability to barf out a potion.

[sunbeam]

Unless you are playing PFS you can make your own loot.

Nothing wrong with a vial that does for an alchemist what a pearl of power does for a wizard.

Plus alchemists can learn formulas from a spellbook, "An alchemist can study a wizard’s spellbook to learn any formula that is equivalent to a spell the spellbook contains."

Also an alchemist could definitely use melee type items.

[Aratrok]

Boro beads are effectively pearls of power for alchemists. They can activate spell trigger items for spells that appear on their formula list.

[WrathW1zard]

Some of the alchemist special items like hybridization funnel are good, or anything that can give INT boost like ioun stones, skim through the slotless wonderous items section of ultimate equipment and you will find loads of useful things for an alchemist.