They sure did

• gunpowder (Chinese alchemists)

• tin foil

• gold plating

• ink,

• dyes (Prussian Blue and Scarlet red)

• paints,

• ceramics (including porcelain in Europe)

• cosmetics,

• leather tanning

• element: antimony, phosphorous, zinc

• hydrochloric acid, Mercury oxide,

• glass manufacture,

• preparation of extracts,

• liquors,

• invented the Bain-marie (and other chemical apparati),

• medicines for saffron …

• distillation,

• early periodic tables... (and general mineral and alloy classifications)

• control systems (like thermostats, barometers, and thermometers)

• but there are more... soooo many more.

I've probably done a podcast episode on the inventor of each of those, so feel free to ask follow up questions. I've done a few AMA's on alchemy (example)