Strontium oxalate
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| Names | |
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| IUPAC name
Strontium oxalate
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.011.286 |
| EC Number |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| 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
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Skin and eye irritant. Inhaling the compound irritates mucous membrane in the lungs. |
| GHS labelling: | |
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| Warning | |
| H302, H312 | |
| P264, P270, P280, P301+P317, P302+P352, P317, P321, P330, P362+P364, P501 | |
| NFPA 704 (fire diamond) | |
| Safety data sheet (SDS) | [1] |
| Related compounds | |
Related compounds
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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] Strontium oxalate is soluble in 20 000 parts of water; in 1 900 parts of 3.5% acetic acid, in 115 parts of the 23% acid, but less soluble in the 35% acid; readily soluble in diluted HCl or nitric acid.[3]
Use in pyrotechnics
[edit]With the addition of heat, strontium oxalate will decompose based on the following reaction:[4]
- 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
[edit]- ^ "Strontium oxalate".
- ^ Knaepen, E. "Preparation and Thermal Decomposition of Various Forms of Strontium Oxalate". Thermochimica Acta 284.1 (1996): 213-27.
- ^ O’Neil, M. J. (Ed.). (2013). The Merck index: An encyclopedia of chemicals, drugs, and biologicals (15a ed.). Royal Society of Chemistry.
- ^ Kosanke, K. "Chemical Components of Fireworks Compositions". Pyrotechnic Chemistry. Whitewater, CO: Journal of Pyrotechnics, 2004. 1-11.