Synonyms: Butanedioicacid, [(dimethoxyphosphinothioyl)thio]-, 4-ethyl ester (9CI); Succinic acid, mercapto-,4-ethyl ester, S-ester with O,O-dimethyl phosphorodithioate (7CI,8CI);Phosphorodithioic acid, O,O-dimethyl ester, S-ester with 4-ethylmercaptosuccinate (8CI); Malathion monoacid; Malathion a-monoacid; Malathion a-monocarboxylic acid; O,O-DimethylS-(1-carboxy-2-carbethoxy)ethyl phosphorodithioate