Strontium chlorate

Chemical compound From Wikipedia, the free encyclopedia

Strontium chlorate is a chemical compound with the formula Sr(ClO3)2. It is a strong oxidizing agent. It exists in several hydrated forms; the monohydrate (Sr(ClO3)2·H2O), the trihydrate (Sr(ClO3)2·3H2O), and the octahydrate (Sr(ClO3)2·8H2O)[1]

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Strontium chlorate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.309 Edit this at Wikidata
EC Number
  • 232-239-3
UNII
  • InChI=1S/2ClHO3.Sr/c2*2-1(3)4;/h2*(H,2,3,4);/q;;+2/p-2
    Key: FRTABACCYANHFP-UHFFFAOYSA-L
  • [O-]Cl(=O)=O.[O-]Cl(=O)=O.[Sr+2]
Properties
Sr(ClO3)2
Molar mass 254.51 g·mol−1
Appearance colorless or white crystals
Density 3.15 g/cm3
Melting point
  • 120 °C (248 °F; 393 K) (hydrates, decompose to anhydrous)
  • 290 °C (554 °F; 563 K) (anhydrous, decomposes)
[1]
174.9 g/100 mL (18 °C (64 °F; 291 K))
Solubility in ethanol soluble (in dilute), insoluble (in absolute)
73.0×10−6 cm3/mol
1.516, 1.605, & 1.626
Structure
rhombic
Hazards[2]
GHS labelling:
GHS03: OxidizingGHS07: Exclamation markGHS09: Environmental hazard
Danger
H271, H302, H312, H315, H320, H332, H335, H411
P210, P220, P221, P261, P273, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P332+P313
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
2
0
2
OX
Related compounds
Other anions
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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It has been used as an oxidizing agent in explosive mixtures, where it has a cooling effect because of the large amount of water of crystallization. It has also been used in a published Italian pyrotechnic violet star formula.[1]

Preparation

Strontium chlorate may be prepared by neutralizing an aqueous chloric acid (HClO3) solution with Sr(OH)2 or strontium carbonate (SrCO3) and then warming this solution over concentrated sulfuric acid (H2SO4). The anhydrous salt may be prepared by heating any of the hydrates to 120 °C (248 °F).[1]

It may also be prepared by warming a solution of strontium hydroxide and bubbling chlorine through it, with subsequent crystallization. Chlorine has no action on dry Sr(OH)2, but it converts the hydrate (Sr(OH)2·8H2O) into strontium chloride (SrCl2) and chlorate, with a small quantity of strontium hypochlorite also being produced.[3]


References

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