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Oxalic acid dihydrate

Name: Oxalic acid dihydrate
Brand: SIAL

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:

6153-56-6

Molecular Weight:

126.07

NACRES:

NA.21

PubChem Substance ID:

57648855

eCl@ss:

39021701

UNSPSC Code:

12352100

EC Number:

205-634-3

MDL number:

MFCD00149102

Beilstein/REAXYS Number:

3679436

Assay:

≥99.5% (manganometric)

Form:

crystals

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Properties

Product Name

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

Quality Segment

200

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 (SO₄^2-): ≤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

Description

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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1 of 1

This Item	O0376	247537	1.00495
Sigma-Aldrich 33506 Oxalic acid dihydrate	Sigma-Aldrich O0376 Oxalic acid dihydrate	Sigma-Aldrich 247537 Oxalic acid dihydrate	Supelco 1.00495 Oxalic acid dihydrate
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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pictograms

GHS05,GHS07

signalword

Danger

hcodes

H302 + H312,H318

pcodes

P264 - P280 - P301 + P312 - P302 + P352 + P312 - P305 + P351 + P338 - P362 + P364

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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