Combine chem dispenser and reagent extractor

[BaneOfGiygas]

Chemicals should be limited to a certain starting amount that could be user refilled.(or bought with money ~ different chems have different prices)

Um. No.

Removing the infinite storage of chemicals basically neuters any room for experimentation, which is kind of half of the entire point of the chemlab. This wouldn't make chemistry interesting and balanced, it would make it tense and frustrating.

Extracting chemicals out of minerals and such is a bit cool, though redundant in the case of things like iron and silicon.