<unk>  is an inorganic compound of<unk>  and sulfur, also known as<unk>  red. It is a nonstoichiometric compound with a variable composition. Its exact structure is unknown. Commercial samples are usually are contaminated with sulfur, which may be removed by washing with carbon disulfide in a Soxhlet extractor.
Antimony pentasulfide
Sodium monofluorophosphate
Calcium arsenate
Ethacridine lactate
Ammonium hexachloroplatinate
Magnesium peroxide
Dihydroxialumini sodium carbonate
Pyridinium chlorochromate