Nitrogen sulfide
Nitrogen sulfide (S4N4) is an inorganic compound that can be found in planetary atmospheres.

Following their mission to Qo'noS in 2151, the crew of  planned to visit an inhabited planet with a nitrogen sulfide atmosphere to begin their mission of exploration, since the planet was located only a few light years away. The expectation was to find non-humanoid life there. ()

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Chemical compounds