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Arsenic and its compounds, especially the trioxide, are used in the production of pesticides, treated wood products, herbicides, and insecticides. These applications are declining with the increasing recognition of the toxicity of arsenic and its compounds. [15] Arsenic has been known since ancient times to be poisonous to humans. [16]
Arsenic compounds have been known for at least 5000 years, and the ancient Greek Theophrastus recognized the arsenic minerals called realgar and orpiment. Elemental arsenic was discovered in the 13th century by Albertus Magnus. [14] Antimony was well known to the ancients. A 5000-year-old vase made of nearly pure antimony exists in the Louvre.
Arsenic trioxide powder.. Compounds of arsenic resemble in some respects those of phosphorus which occupies the same group (column) of the periodic table.The most common oxidation states for arsenic are: −3 in the arsenides, which are alloy-like intermetallic compounds, +3 in the arsenites, and +5 in the arsenates and most organoarsenic compounds.
Arsine (IUPAC name: arsane) is an inorganic compound with the formula As H 3. This flammable, pyrophoric, and highly toxic pnictogen hydride gas is one of the simplest compounds of arsenic. [4] Despite its lethality, it finds some applications in the semiconductor industry and for the synthesis of organoarsenic compounds.
In chemistry, an arsenide is a compound of arsenic with a less electronegative element or elements. Many metals form binary compounds containing arsenic, and these are called arsenides. They exist with many stoichiometries, and in this respect arsenides are similar to phosphides. [1]
Organoarsenic chemistry is the chemistry of compounds containing a chemical bond between arsenic and carbon.A few organoarsenic compounds, also called "organoarsenicals," are produced industrially with uses as insecticides, herbicides, and fungicides.
Under wet conditions, the mold Scopulariopsis brevicaulis produced significant amounts of methyl arsines via methylation [25] of arsenic-containing inorganic pigments, especially Paris green and Scheele's green. In these compounds, the arsenic is either pentavalent or trivalent (arsenic is in group 15), depending on the compound.
For chemical compounds containing arsenic. For an alternative listing please see inorganic_compounds_by_element#Arsenic