Manganese oxalate

Manganese oxalate

Names
Other names Manganese(II) oxalate, Manganese(2+) oxalate, Lindbergite
Identifiers
CAS Number	640-67-5 Y
3D model ( JSmol )	Interactive image
ChemSpider	62705
ECHA InfoCard	100.010.335
EC Number	211-367-3
PubChem CID	69499
UNII	A8PK5I86G8 Y
CompTox Dashboard (EPA)	DTXSID90894218
InChI InChI=1S/C2H2O4.Mn/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2 Key: RGVLTEMOWXGQOS-UHFFFAOYSA-L
SMILES C(=O)(C(=O)[O-])[O-].[Mn+2]
Properties
Chemical formula	C2MnO4
Molar mass	142.956 g·mol−1
Appearance	Light pink crystals
Density	2.43
Solubility in water	insoluble
Solubility product (Ksp)	1.7×10−7[1]
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H312
Precautionary statements	P264, P270, P280, P301+P312, P302+P352, P312, P322, P330, P363, P501
Related compounds
Related compounds	Praseodymium oxalate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Manganese oxalate is a chemical compound, a salt of manganese and oxalic acid with the chemical formula MnC
₂O
₄.^[2][3] The compound creates light pink crystals, does not dissolve in water, and forms crystalline hydrates.^[4] It occurs naturally as the mineral Lindbergite.^[5]

Synthesis

Exchange reaction between sodium oxalate and manganese chloride:

${\displaystyle {\mathsf {MnCl_{2}+Na_{2}C_{2}O_{4}+2H_{2}O\ {\xrightarrow {}}\ MnC_{2}O_{4}\cdot 2H_{2}O\downarrow +2NaCl}}}$

Physical properties

Manganese oxalate forms light pink crystals.

It does not dissolve in water, p K_sp= 6.8.

Forms crystalline hydrates of the composition MnC₂O₄•n H₂O, where n = 2 and 3.^[6]

Crystalline hydrate of the composition MnC₂O₄•2H₂O forms light pink crystals of the

• Manganese oxalate is used as an auxiliary
  siccative
  .
• Manganese oxalate precursor is used to synthesize single phase nanoparticles of various manganese oxides, such as MnO, Mn
  ₂O
  ₃, and Mn
  ₃O
  ₄.[9]

See also

• Iron oxalate

References