phosphorous acid

Noun

 * 1)  a yellowish hygroscopic solid, H3PO3; a mild reducing agent

Translations

 * French: acide phosphoreux
 * German: Phosphonsäure, phosphorige Säure
 * Japanese: 亜燐酸
 * Polish: kwas fosfonowy
 * Romanian:
 * Russian: фо́сфористая кислота́