Rethen

Rethen was the predominant gas in the atmosphere of the gas giant Bespin. It gave the planet its pink hue, had a faintly sweet smell, comparable to that of pancakes drenched with syrup, and was only midly toxic to human lungs.

Appearances

 * Star Wars: Episode V The Empire Strikes Back
 * The Empire Strikes Back: So You Want to Be a Jedi?