Axis Chemicals

Background
Axis Chemicals was a chemical plant in Gotham City. It was where Jack Napier was submerged into a vat of toxic chemicals, and was transformed into the Joker.

The factory, in name and appearance, is comparable to Ace Chemicals from the comics.

The First Encounter
Sent by Carl Grissom to destroy all incriminating evidence, Jack Napier is shocked to find that there is no evidence, and that he has been ratted out by Grissom. Things escalate when the police, led by Lieutenant Eckhart and  Commissioner Gordon arrive. The thugs open fire on the police, and Napier makes a hasty escape. Batman soon arrives and assists the police by stealthily taking down several of Napier's men.

Napier sabotages several of the plant's power generators to escape, and makes up to the final gantry. Just beyond is the escape door. Free to escape, Napier prepares to kill Commissioner Gordon. Batman soon stops him, but Bob the Goon puts Gordon at gunpoint - forcing Batman to let Napier escape. The gangster does not leave, but rather attempts to shoot Batman. The Caped Crusader deflects the bullet into Napier's face, causing him to tumble over the side.

But rather than fall, Napier grabs the gantry. Batman tries to pull him up, but can't, and Napier plummets into the vat of chemicals below. He sinks into the green toxin, quickly disappearing and presumed dead.

Commissioner Gordon orders his cops to get Batman. However, the Dark Knight creates a smoke cloud and disappears into the pipeworks.

The Joker Born
We soon see Batman watching over the plant, lit from behind the luminous Axis sign. He leaves, just as a deathly white hand rises from the green murk, and several playing cards float to the surface.

Stopping The Smilex Threat
Batman realizes that the only way to stop the Joker's master plan is to destroy the nexus of the poisonous products - Axis Chemicals. Charging in with the Batmobile, Batman destroys the facility, taking with it the Smilex toxins and most of The Joker's goons.