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 Institute of Standards and Technology (NIST) - SRM 695 - Trace Elements in Multi-Nutrient Fertilizer
Instrument database: Analytik Jena GmbH - contrAAź 800 F - HRCS- Atomic absorption spectrometer for flame and hydride techniques
Material database: The Food and Environment Research Agency (FAPAS) - Test Material T07121 (Canned Fish)
Material database: National Institute of Standards and Technology (NIST) - SRM 955c - Toxic Elements in Caprine Blood /Level 1
Link database: Metal Speciation Toxicokinetics Database: Arsenic
Material database: National Institute of Standards and Technology (NIST) - SRM 2669 - Arsenic Species in Frozen Human Urine
Link database: CBI: Italy legislation: Wood preserved with arsenic and chromium
Material database: IRMM - Institute for Reference Materials and Measurements - BCR-279 - Sea lettuce
Material database: JRC - Joint Research Centre - BCR-627 - Forms of arsenic in tuna fish tissue
Material database: NIES - National Institute for Environmental Studies - CRM 18: Human Urine
Material database: JRC - Joint Research Centre - ERM-CA403 - Seawater
Link database: National Research Council: Arsenic in Drinking Water
Link database: FSA: Survey of total and inorganic arsenic in rice drinks
Imaging and Identification of Sulfur Species within Corals by X-ray Spectroscopy | EVISA's News
Link database: Blacksmith Institute: Arsenic in Groundwater - Arsenic Pollution
Link database: CBI: Luxemburg legislation: Wood preserved with arsenic and chromium
Sample preservation for speciation analysis - General recommendations | EVISA's News
Organic arsenic-sulfur compound discovered in sheep urine | EVISA's News
Visualizing the bioaccumulation of arsenic in a fern | EVISA's News
Material database: IRMM - Institute for Reference Materials and Measurements - BCR-186 - Pig Kidney