Selenous acid (or selenious acid) is the chemical compound with the formula H2SeO3. Structurally it is more accurately described by (HO)2SeO. It is the principal oxoacid of selenium; the other being selenic acid.
This page contains content from the copyrighted Wikipedia article "Selenous acid"; that content is used under the GNU Free Documentation License (GFDL). You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.