Strontium oxalate
Names
IUPAC name
Strontium oxalate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.011.286 Edit this at Wikidata
EC Number
  • 212-415-6
UNII
  • [Sr+2].[O-]C(=O)C([O-])=O
Properties
SrC2O4
Molar mass 175.64 g·mol−1
Appearance White powder[1]
Density 2.08 g/cm3
Boiling point Decomposes above 200 °C (392 °F; 473 K)
Insoluble in water
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Skin and eye irritant. Inhaling the compound irritates mucous membrane in the lungs.
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H312
P264, P270, P280, P301+P317, P302+P352, P317, P321, P330, P362+P364, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
1
0
1
Safety data sheet (SDS) [1]
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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).[2]

Use in pyrotechnics

With the addition of heat, strontium oxalate will decompose based on the following reaction:[3]

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 produces a red flame color. Since this reaction produces carbon monoxide, which can undergo a further reduction with magnesium oxide, strontium oxalate is an excellent red flame 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.

References

  1. ^ https://pubchem.ncbi.nlm.nih.gov/compound/Strontium-oxalate
  2. ^ Knaepen, E. "Preparation and Thermal Decomposition of Various Forms of Strontium Oxalate". Thermochimica Acta 284.1 (1996): 213-27.
  3. ^ Kosanke, K. "Chemical Components of Fireworks Compositions". Pyrotechnic Chemistry. Whitewater, CO: Journal of Pyrotechnics, 2004. 1-11.
Categories