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: Sigma-Aldrich - Matrix CRM - Soil, Sludge, Sediment: Trace Metals - Loamy Sand 2
Material database: Sigma-Aldrich - Matrix CRM - Soil, Sludge, Sediment: Trace Metals - Fly Ash 3
JRC-IRMM has released ERM-BC211 certified rice reference material for arsenic speciation analysis | EVISA's News
Link database: CBI: Czech Republic legislation: Wood preserved with arsenic and chromium
Company database: PS Analytical
Link database: CDC: National Report on Human Exposure to Environmental Chemicals
Instrument database: B3 Electronic Design - PDV 6000 Heavy metal analyzer
Material database: IAEA - MEL International Atomic Energy Agency - IAEA-405 - Trace Elements and Methylmercury in Estuarine Sediment
Speciation analysis of aluminium in wine by LC-ICP-MS | EVISA's News
Material database: National Institute of Standards and Technology (NIST) - SRM 1577c - Bovine Liver
Arsenic species in rice: Origin, uptake and geographical variation | EVISA's News
Material database: SUPELCO by Sigma-Aldrich - Arsenic(III) selenide
Material database: National Institute of Standards and Technology (NIST) - SRM 1634c - Trace Elements in Fuel Oil
Arsenic-eating bacteria rewrite evolutionary history | EVISA's News
Journals database: Toxics
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Material database: National Institute of Standards and Technology (NIST) - SRM 1643d - Trace Elements in Water
Material database: Food Analysis Performance Assessment Scheme (FAPAS) - Test Material T07141 (Chilli powder)
Material database: IRMM - Institute for Reference Materials and Measurements - BCR-626 - Arsenobetaine solution
Trace element speciation analysis for environmental sciences | EVISA's News