Lithium oxalate

Chemical compound From Wikipedia, the free encyclopedia

Lithium oxalate is an organic compound with the chemical formula Li2C2O4. It is a salt of lithium metal and oxalic acid.[3][4] It consists of lithium cations Li+ and oxalate anions C2O2−4. Lithium oxalate is soluble in water and converts to lithium carbonate when heated.[5]

Quick facts Names, Identifiers ...
Lithium oxalate
Names
IUPAC name
Lithium oxalate
Other names
  • Dilithium oxalate
  • di-Lithium oxalate[1]
  • Oxalic acid dilithium salt[2]
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.008.232 Edit this at Wikidata
EC Number
  • 209-054-1
UNII
  • InChI=1S/C2H2O4-C.2Li/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);;/q;2*+1/p-2
    Key: YNQRWVCLAIUHHI-UHFFFAOYSA-L
  • [Li+].[Li+].[O-]C(=O)C([O-])=O
Properties
Li2C2O4
Molar mass 101.90 g·mol−1
Appearance Colorless crystalline solid
Density 2.12 g/cm3
6.6 g per 100 g of water
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H312
P264, P270, P280, P301+P312, P302+P352, P312, P322, P330, P363, P501
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Synthesis

One of the methods of synthesis is the reaction of direct neutralization of oxalic acid with lithium hydroxide:

2 LiOH + H2C2O4 → Li2C2O4 + 2 H2O

Properties

The compound crystallizes in the monoclinic system, cell parameters a = 3.400 Å, b = 5.156 Å, c = 9.055 Å, β = 95.60°, Z = 4.[3]

Lithium oxalate decomposes when heated at 410–500 °C (770–932 °F; 683–773 K):

Li2C2O4 → Li2CO3 + CO

Applications

In pyrotechnics, the compound is used to color the flame red.[6]

References

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