Strontium oxalate

Strontium oxalate is a compound with the chemical formula SrC2O4. Strontium oxalate can exist either in a hydrated form (SrC2O4•nH2O) or as the acidic salt of strontium oxalate (SrC2O4•mH2C2O4•nH2O).[1]

Strontium oxalate
Names
IUPAC name
Strontium Oxalate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.011.286
EC Number
  • 212-415-6
UNII
Properties
SrC2O4
Molar mass 175.64 g/mol
Density 2.08 g/cm3
Boiling point Decomposes above 200 °C (392 °F; 473 K)
Insoluble in water
Hazards
Main hazards Skin and eye irritant. Inhaling the compound will irritate mucous membrane in the lungs.
Safety data sheet
NFPA 704 (fire diamond)
Flammability code 0: Will not burn. E.g. waterHealth code 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineReactivity code 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
0
1
1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Use in pyrotechnics

With the addition of heat, strontium oxalate will decompose based on the following reaction:[2]

SrC2O4 → SrO + CO2 + CO

Strontium oxalate is a good agent for use in pyrotechnics since it decomposes readily with the addition of heat. When it decomposes into strontium oxide, it will produce a red color. Since this reaction produces carbon monoxide, which can undergo a further reduction with magnesium oxide, strontium oxalate is an excellent red color producing agent in the presence of magnesium. If it is not in the presence of magnesium, strontium carbonate has been found to be a better option to produce an even greater effect.

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References
  1. Knaepen, E. "Preparation and Thermal Decomposition of Various Forms of Strontium Oxalate". Thermochimica Acta 284.1 (1996): 213-27.
  2. Kosanke, K. "Chemical Components of Fireworks Compositions". Pyrotechnic Chemistry. Whitewater, CO: Journal of Pyrotechnics, 2004. 1-11.
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