dimethylarsinic acid (CH3)2AsO2H, also known as cacodylic acid; an organic arsenic compound used as a herbicide

(bound form) arsenous; relating to arsenic with a lower valence

arsphenamine; a chemical compound historically used as an antibiotic treatment for syphilis

a pharmaceutical preparation containing arsenic, such as arsphenamine

gallium arsenide; a semiconductor material used in electronic circuits

a hard iron arsenic sulfide mineral that serves as a primary ore of arsenic