Factorio DrugLab

Factorio Druglab covers both pharmaceutical and petrochemical production:
Petrochem energy and polymer production:

Fracking
Tar sands
Bitumen
Synthetic crude
Natural gas

Pharma:
Potassium based oxidizers (for chemical treatment of water and other substances).

Warfare:
Napalm production, napalm canister and handheld napalm-flamethrower.

This mod adds machinery, plants, chemicals and compounds needed for illicit drug production:
Chemical and petrochemical products needed for cocaine production are produced in new production facilities.

Bitumen:
You probably mostly know about bitumen from its use in pavement. You always kinda knew that tar and asphalt had something to do with oil. Or more vaguely with carbohydrates from the underground.

Such resources are best understood and sorted out based on their density, viscocity or their 'thickness'. From the most dense and viscuous bitumen to gases like methane and ethane. And off course all the better known liquid varieties in between. Like diesel, fuel oil, petroleum, gasoline. Perhaps lesser known is kerosine that is used as fuel in jet engines.
In essence bitumen is a segment of these carbohydrates in the lower, denser and more viscous part of the spectrum.

In nature you will find all of these as part of the same primordal soup that can be extracted from the underground. These carbohydrates originate from ancient organic material: Plant and animal remains exposed to high pressure and high temperatures deep in the underground. So petrochemical materials are not a singular distinct compound like iron or gold but a mix of hundreds or thousands different compounds that gets separated out in the refining process and cleaned up according to use and need.