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Trisulfane, hydrogen trisulfide, or dihydrogen trisulfide is an unstable molecule with the formula H 2S 3 or HSSSH. It is one of the hydrogen polysulfides.
References
"trisulfane (CHEBI:50365)". Chemical Entities of Biological Interest (ChEBI). UK: European Bioinformatics Institute. 18 August 2008. Main. Retrieved 27 September 2011.