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:

Directory of scientists: Jörg Feldmann
Material database: JRC - Joint Research Centre - ERM-CE101 TROUT MUSCLE (trace elements)
Material database: Sigma-Aldrich - Matrix CRM - Soil, Sludge, Sediment: Trace Metals - Sewage Amended Soil
Directory of scientists: Ryszard Lobinski
Material database: National Research Council of Canada (NRC - CNRC) - DORM-4: Fish protein certified reference material for trace metals
Material database: The Food and Environment Research Agency (FAPAS) - Test Material T07134 (Powdered Rice)
Material database: Food Analysis Performance Assessment Scheme (FAPAS) - Test Material T07107 (Coffee)
Arsenic’s Toxicity: Microbiome Alterations in the Mouse Gut | EVISA's News
Material database: National Institute of Standards and Technology (NIST) - SRM 1649a - Urban Dust
Link database: Life Extension: Heavy Metal Toxicity
Link database: WHO: Antimony in Drinking Water
Material database: Food Analysis Performance Assessment Scheme (FAPAS) - Test Material T07160 (Canned Crab Meat)
Chemical speciation analysis for the life sciences | EVISA's News
Link database: Hazardous Substances Data Bank: Dimethylarsenic Acid
Arsenic Speciation in Rice Cereals for Infants | EVISA's News
Impressions from the European Winter Conference on Plasma Spectrochemistry that took place February 3-8, 2017 in Pau (France) | EVISA's News
Material database: Argus Chemicals srl - Monomethylarsonic acid, disodium salt
Material database: The Food and Environment Research Agency (FAPAS) - Test Material T07155 (Soft Drink)
Antimony mine disaster | EVISA's News
Material database: IRMM - Institute for Reference Materials and Measurements - ERM-EC681m - Polyethylene (high level)