The Collaborative International Dictionary
alkargen
Cacodylic \Cac`o*dyl"ic\, a. (Chem.) Of, pertaining to, or derived from, cacodyl.
Cacodylic acid, a white, crystalline, deliquescent substance, (CH3)2AsO.OH, obtained by the oxidation of cacodyl, and having the properties of an exceedingly stable acid; -- also called alkargen. [1913 Webster] ||
Wiktionary
alkargen
n. (context chemistry English) cacodylic acid