# What is the name of the compound that has the formula Li_2SO_3?

$\text{Lithium sulfite............}$
This is the lithium salt of sulfurous acid, ${H}_{2} S {O}_{3}$.......
$\text{Sulfurous acid}$ can also be considered to be $\text{aquated sulfur dioxide}$ in aqueous solution, i.e. ${O}_{2} S \cdot {H}_{2} O$. Sometimes you use this to sterilize brewing equipment. I do not find its distinct smell to be unpleasant.