Strontium sulfate

Strontium sulfate

Chembox new
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IUPACName = Strontium Sulfate
OtherNames =
Section1 = Chembox Identifiers
CASNo = 7759-02-6
PubChem =
SMILES =
Section2 = Chembox Properties
Formula = SrSO4
MolarMass = 183.68 g/mol
Appearance = White or Grey powder
Density = 3.96 g/cm3
Odor = Odorless
MeltingPtC = 1605
BoilingPt = -
Boiling_notes = Decomposition
Solubility = Ksp = 3.8E-7
Section3 = Chembox Hazards
ExternalMSDS = [http://www.sciencelab.com/xMSDS-Strontium_Sulfate-9925109 External MSDS data]
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FlashPt =
Autoignition =

Strontium sulfate (SrSO4) is the sulfate salt of strontium. It is a white, odorless, crystalline powder. It occurs in nature as the mineral celestine.

Chemical Properties

It is soluble in water to the extent of 1 part in 8,800. It is more soluble in dilute HCl and nitric acid and appreciably soluble in alkali chloride solutions (e.g. sodium chloride).

Occurrence in Biology

Crystallized strontium sulfate is utilized by a small group of radiolarian protozoa, called the Acantharea, as a main constituent of their skeleton.

Uses

Like many strontium compounds, strontium sulfate will produce a bright red flame when burned. For this reason it is used in pyrotechnics. The primary difference is that because of the sulfate ion this compound can be used as a high-temperature oxidizer. Thus the oxidizing function will not activate till certain heat levels. These heat levels are commonly found in thermite mixtures, which are mixtures of a metallic fuel, usually magnesium or aluminum, and an oxidizer. It is also used in ceramics.


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