Molecule structure of Magnesium oxalate (CAS NO.547-66-0):

IUPAC Name: Magnesium oxalate 
Molecular Weight: 112.324 g/mol
Molecular Formula: C₂MgO₄ 
Density: 2.180 g/mL at 25 °C(lit.)
Melting Point: 100-113 °C(lit.)
Flash Point: 188.8 °C
Enthalpy of Vaporization: 67.15 kJ/mol
Boiling Point: 365.1 °C at 760 mmHg
Vapour Pressure: 2.51E-06 mmHg at 25 °C
H-Bond Acceptor: 4
Exact Mass: 111.9647
MonoIsotopic Mass: 111.9647
Topological Polar Surface Area: 80.3
Heavy Atom Count: 7
Canonical SMILES: C(=O)(C(=O)[O-])[O-].[Mg+2]
InChI: InChI=1S/C2H2O4.Mg/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);/q;+2/p-2
InChIKey: UHNWOJJPXCYKCG-UHFFFAOYSA-L
EINECS of Magnesium oxalate (CAS NO.547-66-0): 208-932-1

Hazard Codes: O
Risk Statements: 8-50/53 
R8 :Contact with combustible material may cause fire. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 60-61 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR: UN 1482 5.1/PG 2
WGK Germany: 2
HazardClass: 6.1
PackingGroup: III

 Magnesium oxalate (CAS NO.547-66-0) is also named as NSC 112247 ; Ethanedioic acid, magnesium salt (1:1) (9CI) ; Magnesium, (ethanedioato(2-)-kappaO1,kappaO2)- ; Oxalic acid, magnesium salt (1:1) (8CI) .