Tin(II) oxalate

Tin(II) oxalate is an inorganic compound, a salt of tin and oxalic acid with the chemical formula SnC
₂O
₄.^[2] The compound looks like colorless crystals, does not dissolve in water, and forms crystalline hydrates.

Tin(II) oxalate

Names
Other names Tin(II) oxalate, Stannous oxalate
Identifiers
CAS Number	814-94-8 Y
3D model (JSmol)	Interactive image
ChemSpider	12597
ECHA InfoCard	100.011.285
EC Number	212-414-0
PubChem CID	13149
UNII	SAR72FE8EH N
CompTox Dashboard (EPA)	DTXSID1061152
InChI InChI=1S/C2H2O4.Sn/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2 Key: OQBLGYCUQGDOOR-UHFFFAOYSA-L
SMILES C(=O)(C(=O)O)O.[Sn]
Properties
Chemical formula	C2O4Sn
Molar mass	206.728 g·mol−1
Appearance	colorless crystals
Density	3.56
Melting point	280 °C (536 °F; 553 K)[1]
Solubility in water	0.5 g/l
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H312, H318
Precautionary statements	P264, P270, P280, P301+P312, P302+P352, P305+P351+P338, P310, P312, P322, P330, P363, P501
Related compounds
Related compounds	Magnesium oxalate Strontium oxalate Barium oxalate Iron(II) oxalate Iron(III) oxalate Praseodymium oxalate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Effect of oxalic acid solution on tin(II) oxide :

${\displaystyle {\mathsf {SnO+H_{2}C_{2}O_{4}\ {\xrightarrow {}}\ SnC_{2}O_{4}\downarrow +H_{2}O}}}$

Tin(II) oxalate can also be obtained by using tin(II) chloride and oxalic acid.^[3]

Properties

Tin (II) oxalate forms colorless crystals.

Insoluble in water and acetone. Soluble in dilute HCl,^[4] methanol, and petroleum ether.^[5]

Forms crystal hydrates of the composition SnC₂O₄•n H₂O, where n = 1 and 2.

Decomposes on heating:

${\displaystyle {\mathsf {SnC_{2}O_{4}\ {\xrightarrow {380^{o}C}}\ SnO_{2}+2CO}}}$

Applications

• Tin oxalate is used as a catalyst in the production of organic esters and plasticizers.^[4]
• It is used for dyeing and printing fabrics.
• The compound is also used in stannous oral care compositions.
• Few studies have reported on the use of tin(II) oxalate as an anode material for rechargeable lithium batteries.^[6]