Gorzarg-5 was a mineral planet with a wide variety of geological formations. Although the atmosphere itself was breathable, the planet's climate was far from hospitable. Thick, low clouds of methane rained corrosive sodium hydroxide onto the surface. This precipitation could lead to poisonous flooding, causing destruction of organic material and explaining the scarcity (or even absence) of life on the planet.
The planet's corrosive floods were a metaphor for Calvin's bath.