Heavy metal
Readily absorbed via GI tract and inhalation, poorly via skin
Tasteless and odorless
Organic trioxide form used as chemotherapeutic agent
Trivalent form, As3+, is toxic to over 200 intracellular enzymes
Known carcinogen: skin, lung, other
Ingestion fatal dose: 100-200mg
Poisoning
Contaminated drinking water
Eruptions
Metal and semiconductor industry
Wood preservatives
seafood<unk>  (felt to be organic form which is NONTOXIC and cleared from body in few days)
Arsenic toxicity
Aluminum toxicity
Mercury toxicity
Antimony toxicity
Methane toxicity
Mold toxicity
Barium toxicity
Gold toxicity