* Disulfides: These compounds contain sulfur in the -1 oxidation state. Examples include sulfur dioxide (SO2), sodium sulfite (Na2SO3), and calcium sulfite (CaSO3).
* Thiosulfates: These compounds contain sulfur in the +2 oxidation state. Examples include sodium thiosulfate (Na2S2O3) and potassium thiosulfate (K2S2O3).
* Sulfates: These compounds contain sulfur in the +6 oxidation state. Examples include sulfuric acid (H2SO4), sodium sulfate (Na2SO4), and calcium sulfate (CaSO4).
* Organic sulfur compounds: These compounds contain sulfur covalently bonded to carbon atoms. Examples include dimethyl sulfide ((CH3)2S), dimethyl sulfoxide ((CH3)2SO), and methanethiol (CH3SH).
