Oxalic acid dihydrate

Product Name

Oxalic acid dihydrate, BioUltra, ≥99.0% (RT)

InChI key

GEVPUGOOGXGPIO-UHFFFAOYSA-N

InChI

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

SMILES string

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

grade

biotech. grade

vapor density

4.4 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

product line

BioUltra

assay

≥99.0% (RT)

form

crystals

impurities

insoluble matter, passes filter test
≤0.001% total nitrogen (N)

ign. residue (900 °C)

≤0.01% (as SO₄)

pH

~1.0 (25 °C, 1 M in H₂O)

mp

104-106 °C (lit.)

solubility

H₂O: 1 M at 20 °C, clear, colorless

anion traces

chloride (Cl^-): ≤5 mg/kg
sulfate (SO₄^2-): ≤50 mg/kg

cation traces

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤5 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤2 mg/kg
K: ≤50 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

absorption

cut-off at 303 nm in H₂O at 1 M

Quality Level

100