arsonous acids

https://doi.org/10.1351/goldbook.A00458
HAs(OH)2 and its As-@H02891@ derivatives.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1320 [Terms] [Paper]