1a : a colorless unstable oily thio acid C2H5OCSSH obtained in the form of its potassium salt by reaction of potassium ethoxide with carbon disulfide; O-ethyl dithio-carbonate
b : any of a series of analogous unstable thio acids ROCSSH obtained in the form of their salts by reaction of alkoxides with carbon disulfide : an O-ester of dithio-carbonic acid
//methyl xanthic acid CH3OCSSH