Strontium chloride

Strontium chloride
IUPAC name Strontium chloride
Another name Strontium (II) chloride
Identification information
CAS registration number	10,476-85-4  ,  10,025-70-4 (hexahydrate)
Characteristic
Chemical formula	SrCl2
Molar mass	158.53 g/mol (anhydride) 266.62 g/mol (hexahydrate)
The appearance	White crystal
Density	3.052 g/cm3 (anhydride, monoclinic crystal) 2.672 g/cm3 (dihydrate) 1.930 g/cm3 (hexahydrate)
Melting point	874 degrees Celsius (anhydride) 61 degrees Celsius (hexahydrate)
The boiling point	1,250 degrees Celsius (anhydride)
Solubility to water	An anhydride: 53.8 g/100 mL (20 degrees Celsius) Hexahydrate: 106 g/100 mL (0 degrees Celsius) 206 g/100 mL (40 degrees Celsius)
Solubility	Ethanol： 難溶 Acetone： 難溶 Ammonia： Soluble
Refractive index (nD)	1.650 (anhydride) 1.594 (dihydrate) 1.536 (hexahydrate) [1]
Structure
Crystal structure	Crooked rutile structure
Coordination structure	Eight figures (I coordinate six)
The risk
The main risk	Irritating (Xi)
Ignition point	Noninflammability
Associated material
Other anions	Strontium fluoride Strontium bromide Strontium iodide
Other positive ions	Magnesium chloride Calcium chloride Barium chloride
I can put a case, the data without the special mention for normal temperature (25 degrees Celsius), the ordinary pressure (100 kPa).

Strontium (or I do not obtain it strontium, Strontium chloride) chloride is salt consisting of strontium and chlorine. The composition type is SrCl₂. In ionicity, I dissolve in water well. I melt, and degree same as water to ethylene glycol is soluble to ethanol. It is higher in the toxicity than calcium chloride and is lower than barium chloride. I show bright red flame reaction. An anhydride is a crystal of the colorless cubic system, and, as for the crystal structure, a fluorite type, a grating constant are 0.69767nm. Others, one or two, hexahydrate are known, and there are all deliquescence characteristics including an anhydride. Hexahydrate is the colorless orthorhombic crystal which is stable at room temperature. I release water at 61.4 degrees Celsius and become dihydrate when I heat hexahydrate and become the anhydride at monohydrate, approximately 150 degrees Celsius at approximately 100 degrees Celsius more.

Table of contents

Chemical property

Strontium chloride is used as raw materials of other strontium compounds such as strontium (strontium chromate, yellow) chromate with a typical ionic metal salt.

SrCl₂(aq) + Na₂CrO₄(aq) → SrCrO4(s) +2 NaCl (aq)

Strontium chloride is single salt, and the water solution is approximately neutral.

Synthetic

Strontium chloride is provided if I react strontium hydroxide or strontium carbonate with hydrochloric acid.

Sr(OH)2(aq) +2 HCl (aq) → SrCl₂(aq) +2 H₂O

SrCO3(s) +2 HCl (aq) → SrCl₂(aq) + CO₂ (g) + H₂O

The element simple substance of strontium and chlorine reacts intensely and produces strontium chloride.

I mix strontium carbonate and calcium chloride and, other than the above, melt industrially, and the method to concentrate after having extracted this with water is used.

Use

Strontium itself chloride does not have the large-scale use and is used for the synthesis of other various strontium compounds. Because strontium sulfate is insolubility, strontium chloride is usable for the detection of the ion sulfate like barium chloride, but, as for the solubility of strontium sulfate, the detection limit is inferior to barium sulfate because it is high.

SrCl₂(aq) + SO₄^2-(aq) → SrSO4(s) +2 Cl^- (aq)

Strontium chloride is often used for the coloration (red) of fireworks. The use to vitrifacture and metallurgy is known, too. I may be added in tooth powder to prevent periodontal disease. I am used for homeopathy in the name of strontium chlorii.

I am usually given radioisotope ⁸⁹Sr used for treatment of the bone cancer in form of ⁸⁹SrCl₂.

It is necessary to add a very small amount of strontium chloride to seawater used in an aquarium. Originally a very small amount of strontium ion is included in natural seawater, and this is because I am used for the formation of the external skeleton of the certain plankton.

Attention

Although the toxicity is low, it must treat strontium chloride than barium chloride carefully.

Footnote

[Help]

1. ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0070494398

References

1. N. N. Greenwood, A. Earnshaw, Chemistry of the Elements, Pergamon Press, Oxford, UK, 1984.
2. Handbook of Chemistry and Physics, 71st edition, CRC Press, Ann Arbor, Michigan, 1990.
3. It is Rahway, New Jersey, 1960 The Merck Index, 7th edition, Merck & Co.

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