What is sulfur?

  • (noun): An abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions).
    Synonyms: S, sulphur, atomic number 16
    See also — Additional definitions below


Sulfur or sulphur (British English; see spelling below) is a chemical element with symbol S and atomic number 16. It is an abundant, multivalent non-metal. Under normal conditions, sulfur atoms form cyclic octatomic molecules with chemical formula S8. Elemental sulfur is a bright yellow crystalline solid when at room temperature. Chemically, sulfur can react as either an oxidant or reducing agent. It oxidizes most metals and several nonmetals, including carbon, which leads to its negative charge in most organosulfur compounds, but it reduces several strong oxidants, such as oxygen and fluorine.

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Some articles on sulfur:

Staphylothermus - Metabolism
... Both organisms are sulfur dependent, extreme marine thermophiles ... These archeons require sulfur for growth but can produce hydrogen if sulfur becomes limited ... Staphylothermus marinus converts sulfur to hydrogen sulfide using these extremozymes ...
Lower Sulfur Oxides
... The lower sulfur oxides are a group of chemical compounds consisting of SO, sulfur monoxide and its dimer S2O2 S2O sulfur monoxides, SnO, based on cyclic Sn rings where n is 5-10 S7O2 polymeric ... compounds reported by early workers such as the blue "sesquioxide", S2O3, formed by dissolving sulfur in liquid SO3 appears to be a mixture of polysulfate salts of the S42+ and ... Sulfur monoxide, monomer (SO) and dimer (S2O2) These are stable molecules that have been trapped at low temperature (see sulfur monoxide article) ...
Liver Of Sulfur
... Liver of Sulfur is a poorly defined mixture of potassium sulfide, potassium polysulfide, potassium thiosulfate, and probably potassium bisulfide ... Synonyms include hepar sulfuris, sulfur, sulfurated potash and sulfurated potassa ... Liver of sulfur is mainly used in metalworking to form a patina, turning copper alloys brown or black ...
Sulfur - Precautions
... Elemental sulfur is non-toxic, as generally are the soluble sulfate salts, such as Epsom salts ... When sulfur burns in air, it produces sulfur dioxide ... Sulfur trioxide (made by catalysis from sulfur dioxide) and sulfuric acid are similarly highly corrosive, due to the strong acids that form on contact with water ...
Stratospheric Sulfur Aerosols - Chemistry
... The chemistry of stratospheric sulfur aerosols varies significantly according to their source ... affecting both the formation and elimination of sulfur aerosols are not fully understood ... to determine a viable approach for geoengineering uses of sulfur aerosol formation ...

More definitions of "sulfur":

  • (verb): Treat with sulphur in order to preserve.
    Synonyms: sulphur