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* [http://periodic.lanl.gov/elements/33.html Los Alamos National Laboratory – Arsenic]

* [http://ctd.mdibl.org/detail.go?type=chem&acc=D001151&queryTerms=arsenic&queryType=contains CTD's Arsenic page] and [http://ctd.mdibl.org/detail.go?type=chem&acc=D001152&queryTerms=arsenicals&queryType=contains CTD's Arsenicals page] from the [[Comparative Toxicogenomics Database]]

* [http://www.atsdr.cdc.gov/csem/arsenic/ ATSDR - Case Studies in Environmental Medicine: Arsenic Toxicity]

* [http://www.clu-in.org/contaminantfocus/default.focus/sec/arsenic/cat/Overview/ Contaminant Focus: Arsenic] by the [[United States Environmental Protection Agency|EPA]].