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33506

Oxalic acid dihydrate

ACS reagent grade, ≥99.5% (manganometric), crystals, puriss. p.a., reag. ISO, reag. Ph. Eur.

Synonym(s):

Ethanedioic acid dihydrate

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About This Item

Linear Formula:
HO2CCO2H · 2H2O
CAS Number:
Molecular Weight:
126.07
NACRES:
NA.21
PubChem Substance ID:
eCl@ss:
39021701
UNSPSC Code:
12352100
EC Number:
205-634-3
MDL number:
Beilstein/REAXYS Number:
3679436
Assay:
≥99.5% (manganometric)
Form:
crystals
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Product Name

Oxalic acid dihydrate, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.5% (manganometric)

Quality Segment

agency

USP/NF, reag. ISO, reag. Ph. Eur.

vapor density

4.4 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

grade

ACS reagent, puriss. p.a.

assay

≥99.5% (manganometric)

form

crystals

impurities

foreign organic matter, in accordance, ≤0.001% total nitrogen (N)

ign. residue

≤0.01% (as SO4)

mp

104-106 °C (lit.)

anion traces

chloride (Cl-): ≤5 mg/kg, sulfate (SO42-): ≤20 mg/kg

cation traces

Ca: ≤5 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤2 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg, heavy metals: ≤5 ppm (by ICP-OES)

functional group

carboxylic acid

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

General description

Oxalic acid dihydrate crystals are monoclinic and exhibit a space group P21/n. Each unit cell contains two molecules. 13C chemical shielding tensors in oxalic acid dihydrate have been evaluated.

Application

Oxalic acid dihydrate has been used to prepare oxalate precursor, which was employed for the synthesis of zinc oxide nanopowders. It may be used to prepare the 0.01M solution of oxalic acid, which was employed in the mobile phase in liquid chromatographic studies.[1]

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This Item
O03762475371.00495
grade

ACS reagent, puriss. p.a.

grade

-

grade

ACS reagent

grade

ACS reagent

assay

≥99.5% (manganometric)

assay

≥99.0% (GC)

assay

≥99%, 99.5-102.5% (ACS specification)

assay

99.5-102.0% (manganometric)

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

300

agency

USP/NF, reag. Ph. Eur., reag. ISO

agency

-

agency

-

agency

reag. ISO, reag. Ph. Eur.

form

crystals

form

-

form

solid

form

solid

impurities

foreign organic matter, in accordance, ≤0.001% total nitrogen (N)

impurities

-

impurities

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

impurities

≤50 ppm Insoluble matter


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Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1

Storage Class

11 - Combustible Solids

ppe

dust mask type N95 (US), Eyeshields, Gloves



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