Products of sunlight-irradiated mixtures of oxides and nitrogen and alkyl sulfides and methanethiol in air include formaldehyde, acetaldehyde and PAN, sulfur dioxide, and alkyl nitrates as well as particulate alkanesulfonic acids and inorganic sulfate. The nature and yields of gaseous and particulate products are discussed in terms of OH-initiated reaction pathways, including C-S bond scission, and subsequent reactions of alkylthiyl radicals, including those leading to photolabile RSNO and stable RSNO2 products for which indirect evidence is presented.