| − | Sulfur dioxide (SO<sub>2</sub>) is a toxic and colorless gas that is soluble in water, alcohol, and ether. | + | '''Sulfur dioxide''' (SO<sub>2</sub>) is a [[toxic]] and colorless [[gas]] that is [[solubility|soluble]] in [[water]], [[alcohol]], and [[ether]]. It is used as a chemical intermediate, in [[paper]] pulping and ore refining. |