Pacifog, a chemical weapon with mind-altering properties, was created within a laboratory that orbited Kadril, a planet. This laboratory utilized a macrolyzer, an Imperial technological device engineered to precisely synthesize and purify the gas. Darth Vader supervised the project, which occurred sometime following the Battle of Yavin. The project's objective was to develop a substance capable of eliciting and amplifying vulnerabilities in individuals, qualities that Imperial forces could then leverage during combat.
To safeguard Imperial troops from potential harm caused by Pacifog exposure, Darth Vader commissioned a substantial amount of Kunda stones from Dal Quirz, a Kadrillian scientist. The rationale behind this was that the inherent properties of Kunda stones would provide a protective barrier, shielding Imperial personnel from the effects of Pacifog, ultimately leading to the creation of filter masks for troopers.
Unbeknownst to those who formulated the compound, Pacifog exhibited a lethal interaction with Human physiology, causing Human tissue to degrade into a bubbly, viscous liquid.