Quesh

Quesh was a toxic waste world within Hutt Space.

It was discovered by the Galactic Republic during the Great War but was promptly abandoned due to its poisonous atmosphere.

Its poisonous atmosphere makes it lethal to most life forms, but after Republic scientists discovered that the planet's chemicals could be used to create potent medicines and adrenals, it became a highly valued world that eventually became a battleground between the Republic and the Sith Empire.