arsenic

Arsenic is a chemical element that has the symbol As and atomic number 33. Its Atomic Mass is 74.92. Its Ionic Charge is (3-). This is a notoriously poisonous metalloid that has many allotropic forms: yellow (molecular non-metallic) and several black and gray forms (metalloids) are a few that are seen. Three metalloidal forms of arsenic with different crystal structures are found free in nature (the minerals arsenic sensu strictu and the much rarer arsenolamprite and pararsenolamprite), but it is more commonly found as arsenide and arsenate compounds. Several hundred such mineral species are known. Arsenic and its compounds are used as pesticides, herbicides, insecticides and various alloys.

The most common oxidation states for arsenic are -3 (arsenides: usually alloy-like intermetallic compounds), +3 (arsenates(III) or arsenites, and most organoarsenic compounds), and +5 (arsenates(V): the most stable inorganic arsenic oxycompounds). Arsenic also bonds readily to itself, forming, for instance, As-As pairs in the red sulfide realgar and square As43- ions in the arsenide skutterudite. In the +3 oxidation state, the stereochemistry of arsenic is affected by possession of a lone pair of electrons.



The term "arsenic" was found in the following pages:

Material database: National Research Council of Canada (NRC - CNRC) - CAME-1 Canola Meal Certified Reference Material
Arsenic species distribution in drinking water wells in the USA with high arsenic concentrations | EVISA's News
Link database: CBI: EU legislation: Wood preserved with arsenic
Instrument database: Analytik Jena GmbH - contrAA® 800 G - Graphite Furnace Atomic Absorption Spectrometer
Link database: Treated Timber: What is CCA-Treated Timber ?
Link database: Encyclopedia of Earth: Arsenic use in the United States
Identification of Monomethylmonothioarsonic Acid as the Major Thioarsenical Generated During Extraction of Arsenic Species from Rice | EVISA's News
New Agilent HPLC column for routine determination of arsenic species in human urine by HPLC-ICP-MS | EVISA's News
Link database: CBI: Finland legislation: Wood preserved with arsenic and chromium
Link database: CBI: Denmark legislation: Wood preserved with arsenic and chromium
Material database: Sigma-Aldrich - Matrix CRM - Soil, Sludge, Sediment: Trace Metals - Sandy Loam 8
Link database: Dartmouth Toxic Metal Research: Arsenic - A Murderous History
An easy way to selectively determine organomercury in seafood | EVISA's News
Material database: The Food and Environment Research Agency (FAPAS) - Test Material T07110 (Seaweed)
Link database: Hazardous Substances Data Bank: Arsenic, elemental
Link database: US FDA: Arsenic in Rice and Rice Products
Instrument database: PS Analytical - 10.825 HPLC-AFS System for Speciation Analysis of Sb, As and Se
Material database: National Institute for Minamata Disease (NIMD) - NIMD-1 Human Hair
UK Food Standards Agency releases research on arsenic in rice milk | EVISA's News
Testing finds: Arsenic added to feedstuff finds its way into chicken meat | EVISA's News