Sulfur oxide can refer to either of these chemical compounds:

• Sulfur dioxide, sulfur in +4 oxidation state, toxic heavy gas
• Sulfur trioxide, sulfur in +6 oxidation state, irritating liquid, used to make sulfuric acid

This disambiguation page lists articles associated with the title Sulfur oxide. If an internal link led you here, you may wish to change the link to point directly to the intended article.