Magnesium oxalate

Magnesium oxalate
Names
	IUPAC name magnesium oxalate
	Systematic IUPAC name magnesium oxalate
	Other names magnesium ethanedioate; ethanedioic acid, magnesium salt (1:1); (Dihydrate); magnesium oxalate-2-hydrate; magnesium oxalate dihydrate; oxalic acid magnesium salt dihydrate;
Identifiers
CAS Number	547-66-0 ; 6150-88-5 (dihydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	61648 ;
ECHA InfoCard	100.008.121
EC Number	208-932-1;
PubChem CID	68353 ;
UNII	620U3O59Z6 ; D674BHV95V (dihydrate) ;
UN number	2811
CompTox Dashboard (EPA)	DTXSID0060276 ;
	InChI InChI= 1S/C2H2O4.Mg/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2; 1S/C2H2O4.Mg.2H2O/c3-1(4)2(5)6;;;/h(H,3,4)(H,5,6);;2*1H2/q;+2;;/p-2 (Dihydrate); ;
	SMILES C(=O)(C(=O)[O-])[O-].[Mg+2];
Properties
Chemical formula	MgC2O4; MgC2O4•2H2O (Dihydrate);
Molar mass	112.324 g/mol; 148.354 g/mol (Dihydrate);
Appearance	white solid
Density	2.45 g/cm3
Melting point	between 420 and 620 °C (788 and 1,148 °F; 693 and 893 K); 150 °C (302 °F; 423 K) (dihydrate) both decompose
Solubility in water	0.038g/100g H2O (anhydrous and dihydrate)
Solubility product (Ksp)	8.5 × 10−5 for MgC; 2O; 4
Solubility	insoluble in organics
Vapor pressure	2.51×10−6 mmHg
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	-1269.0 kJ mol−1
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Irritant
NFPA 704 (fire diamond)	1 0 0
Flash point	Not Applicable
Autoignition; temperature	Not Applicable
Related compounds
Related compounds	Magnesium Oxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Magnesium oxalate is an organic compound comprising a magnesium cation with a 2+ charge bonded to an oxalate anion. It has the chemical formula MgC₂O₄. Magnesium oxalate is a white solid that comes in two forms: an anhydrous form and a dihydrate form where two water molecules are complexed with the structure. Both forms are practically insoluble in water and are insoluble in organic solutions.

Names

IUPAC name magnesium oxalate
Systematic IUPAC name magnesium oxalate
Other names magnesium ethanedioate ethanedioic acid, magnesium salt (1:1) (Dihydrate) magnesium oxalate-2-hydrate magnesium oxalate dihydrate oxalic acid magnesium salt dihydrate
Identifiers
CAS Number	547-66-0 ^Y 6150-88-5 (dihydrate)^Y
3D model (JSmol)	Interactive image
ChemSpider	61648
ECHA InfoCard	100.008.121
EC Number	208-932-1
PubChem CID	68353
UNII	620U3O59Z6^Y D674BHV95V (dihydrate)^Y
UN number	2811
CompTox Dashboard (EPA)	DTXSID0060276
InChI InChI= 1S/C2H2O4.Mg/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2 1S/C2H2O4.Mg.2H2O/c3-1(4)2(5)6;;;/h(H,3,4)(H,5,6);;2*1H2/q;+2;;/p-2 (Dihydrate)
SMILES C(=O)(C(=O)[O-])[O-].[Mg+2]
Properties
Chemical formula	MgC₂O₄ MgC₂O₄•2H₂O (Dihydrate)
Molar mass	112.324 g/mol 148.354 g/mol (Dihydrate)
Appearance	white solid
Density	2.45 g/cm³
Melting point	between 420 and 620 °C (788 and 1,148 °F; 693 and 893 K) 150 °C (302 °F; 423 K) (dihydrate) both decompose
Solubility in water	0.038g/100g H₂O (anhydrous and dihydrate)
Solubility product (K_sp)	8.5 × 10⁻⁵ for MgC ₂O ₄
Solubility	insoluble in organics
Vapor pressure	2.51×10⁻⁶ mmHg
Thermochemistry
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	-1269.0 kJ mol⁻¹
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Irritant
NFPA 704 (fire diamond)	1 0 0
Flash point	Not Applicable
Autoignition temperature	Not Applicable
Related compounds
Related compounds	Magnesium Oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references