Strontium chlorate

Strontium chlorate
Identifiers
CAS Number	7791-10-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	23043;
ECHA InfoCard	100.029.309
EC Number	232-239-3;
PubChem CID	24641;
UNII	XG48A4P4FB ;
CompTox Dashboard (EPA)	DTXSID70890637 ;
	InChI InChI=1S/2ClHO3.Sr/c22-1(3)4;/h2(H,2,3,4);/q;;+2/p-2 Key: FRTABACCYANHFP-UHFFFAOYSA-L;
	SMILES [O-]Cl(=O)=O.[O-]Cl(=O)=O.[Sr+2];
Properties
Chemical formula	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);
Solubility in water	174.9 g/100 mL (18 °C (64 °F; 291 K))
Solubility in ethanol	soluble (in dilute), insoluble (in absolute)
Magnetic susceptibility (χ)	73.0×10−6 cm3/mol
Refractive index (nD)	1.516, 1.605, & 1.626
Structure
Crystal structure	rhombic
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H271, H302, H312, H315, H320, H332, H335, H411
Precautionary statements	P210, P220, P221, P261, P273, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P332+P313
NFPA 704 (fire diamond)	2 0 2 OX
Related compounds
Other anions	Strontium chromate; Strontium nitrate; Strontium perchlorate; Strontium peroxide;
Other cations	Potassium chlorate; Magnesium chlorate; Barium chlorate;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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]

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

^ ^a ^b ^c ^d Fedoroff, Basil T.; Sheffield, Oliver E.; Clift, George D.; Reese, Earl F. (1 January 1962). "C - Chlorates - Strontium chlorate". Encyclopedia of Explosives and Related Items (PDF). Vol. 2. Picatinny Arsenal, NJ: Army Armament Research Development And Engineering Center, Picatinny Arsenal - Warheads Energetics And Combat Support Armaments Center. p. C200. AD0422747, PATR 2700.
^ "SDS - Strontium chlorate" (PDF). www.pfaltzandbauer.com. Pfaltz & Bauer Rare and Fine Chemicals. Retrieved 6 November 2025.
^ Konigel-Weisberg, J. (1 January 1879). "Ueber die Einwirkung von Chlorgas auf Barythydrat und Strontianhydrat". Berichte der Deutschen Chemischen Gesellschaft. 12 (1): 511–513. doi:10.1002/cber.187901201147.

[EExplosivesV2-1] Fedoroff, Basil T.; Sheffield, Oliver E.; Clift, George D.; Reese, Earl F. (1 January 1962). "C - Chlorates - Strontium chlorate". Encyclopedia of Explosives and Related Items (PDF). Vol. 2. Picatinny Arsenal, NJ: Army Armament Research Development And Engineering Center, Picatinny Arsenal - Warheads Energetics And Combat Support Armaments Center. p. C200. AD0422747, PATR 2700.

[PfaltzSDS-2] "SDS - Strontium chlorate" (PDF). www.pfaltzandbauer.com. Pfaltz & Bauer Rare and Fine Chemicals. Retrieved 6 November 2025.

[3] Konigel-Weisberg, J. (1 January 1879). "Ueber die Einwirkung von Chlorgas auf Barythydrat und Strontianhydrat". Berichte der Deutschen Chemischen Gesellschaft. 12 (1): 511–513. doi:10.1002/cber.187901201147.

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