Oxalic acid dihydrate

grade

ACS reagent

Quality Level

200

vapor density

4.4 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

Assay

≥99%
99.5-102.5% (ACS specification)

form

solid

impurities

H₂SO₄ passes test (darkened)
≤0.001% N compounds
≤0.005% insolubles

ign. residue

≤0.01%

mp

104-106 °C (lit.)

anion traces

chloride (Cl^–): ≤0.002%
sulfate (SO₄^2-): ≤0.005%

cation traces

Ca: ≤0.001%
Fe: ≤2 ppm
heavy metals: ≤5 ppm (by ICP-OES)

SMILES string

[H]O[H].[H]O[H].OC(=O)C(O)=O

InChI

1S/C2H2O4.2H2O/c3-1(4)2(5)6;;/h(H 3 4)(H 5 6);2*1H2

InChI key

GEVPUGOOGXGPIO-UHFFFAOYSA-N