Dimethyl oxalate

Dimethyl oxalate ;
Names:	dimethyl oxalate; methyl oxalate; oxalic acid dimethyl ether;
Formula:	(CH3)2C2O4;
Molar mass:	118.088 g/mol;
Crystal system:	monoclinic; a=3.9 Å, b=11.88 Å, c=6.21 Åα=90°, β=103.1°, γ=90°;
Shapes:	https://en.crystalls.info/w/uploads/media/f/ff/Parallelogram.json Parallelogram https://en.crystalls.info/w/uploads/media/3/30/Tetragonal_flat_prism.json Tetragonal flat prism https://en.crystalls.info/w/uploads/media/5/52/Needle.json Needle ;
Color:	colorless;
Melting point:	54 °C327.15 K <br />129.2 °F <br />588.87 °R <br />;
Boiling point:	163.3 °C436.45 K <br />325.94 °F <br />785.61 °R <br />;
Magnetic properties:	diamagnetic; χ=-5.57 · 10-5cm³/mol;
Stability:	stable;
Hardness:	fragile

Description

Organic compound, complex ether of methanol and dibasic oxalic acid. Doesn't form water hydrates.

Can sublimate at room temperature

TableGraph

Temperature	g/`100,00` g water	g/`100,00` g pyridine	g/`100,00` g formic acid 95%
0°C273.15 K <br />32 °F <br />491.67 °R <br />	`~4.2`
20°C293.15 K <br />68 °F <br />527.67 °R <br />	`6.18`	`4.8`	`~22.58`
44.5°C317.65 K <br />112.1 °F <br />571.77 °R <br />	`18.8`

Ethers
Acetylsalicylic acid (C₉H₈O₄) • Dimethyl oxalate ((CH₃)₂C₂O₄) • Ethylvanillin (C₉H₁₀O₃) • Vanillin (C₈H₈O₃) • Vanillic acid (C₈H₈O₄)

Oxalates
Salts	Ammonium oxalate ((NH₄)₂C₂O₄) • Cobalt(II) oxalate (CoC₂O₄) • Diglycine oxalate ((NH₂CH₂COOH)₃ · H₂C₂O₄) • Neodymium oxalate (Nd₂(C₂O₄)₃) • Oxalic acid (H₂C₂O₄) • Sodium oxalate (Na₂C₂O₄) • Tris(ethylenediamine)nickel oxalate ([Ni(H₂NCH₂CH₂NH₂)₃]C₂O₄)
Dioxalatocuprates	Ammonium dioxalatocuprate(II) ((NH₄)₂[Cu(C₂O₄)₂]) • Potassium dioxalatocuprate(II) (K₂[Cu(C₂O₄)₂]) • Sodium dioxalatocuprate(II) (Na₂[Cu(C₂O₄)₂])
Trioxalatoaluminates	Potassium trioxalatoaluminate (K₃[Al(C₂O₄)₃]) • Sodium trioxalatoaluminate (Na₃[Al(C₂O₄)₃])
Trioxalatochromates	Potassium trioxalatochromate(III) (K₃[Cr(C₂O₄)₃]) • Sodium trioxalatochromate(III) (Ns₃[Cr(C₂O₄)₃])
Trioxalatocobaltates	Potassium trioxalatocobaltate(III) (K₃[Co(C₂O₄)₃])
Trioxalatoferrates	Ammonium trioxalatoferrate(III) ((NH₄)₃[Fe(C₂O₄)₃]) • Lithium trioxalatoferrate(III) (Li₃[Fe(C₂O₄)₃]) • Lithium trioxalatoferrate(III)-chloride (Li₄[Fe(C₂O₄)₃]Cl) Potassium trioxalatoferrate(III) (K₃[Fe(C₂O₄)₃]) • Potassium-sodium trioxalatoferrate(III) (K₅Na[Fe(C₂O₄)₃]₂) • Sodium trioxalatoferrate(III) (Na₃[Fe(C₂O₄)₃])
Ethers	Dimethyl oxalate ((CH₃)₂C₂O₄)

Dimethyl oxalate
Names:	dimethyl oxalate methyl oxalate oxalic acid dimethyl ether
Formula:	(CH₃)₂C₂O₄
Molar mass:	118.088 g/mol
Crystal system:	monoclinic a=3.9 Å, b=11.88 Å, c=6.21 Åα=90°, β=103.1°, γ=90°
Shapes:	Parallelogram Tetragonal flat prism Needle
Color:	colorless
Melting point:	54 °C327.15 K <br />129.2 °F <br />588.87 °R <br />
Boiling point:	163.3 °C436.45 K <br />325.94 °F <br />785.61 °R <br />
Magnetic properties:	diamagnetic χ=-5.57 · 10^-5cm³/mol
Stability:	stable
Hardness:	fragile