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Merck

752835

Oxalic acid dihydrate

99.999% trace metals basis

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
EC Number:
205-634-3
UNSPSC Code:
12352100
PubChem Substance ID:
329766316
Beilstein/REAXYS Number:
3679436
MDL number:
MFCD00149102
Assay:
99.999% trace metals basis
Form:
solid

Key Documents

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InChI

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

InChI key

GEVPUGOOGXGPIO-UHFFFAOYSA-N

SMILES string

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

vapor density

4.4 (vs air)

vapor pressure

<0.01 mmHg ( 20 °C)

assay

99.999% trace metals basis

form

solid

mp

104-106 °C (lit.)

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Application

General applications may include its use as a compound in indigo dyeing, calico printing etc. It may used as a reducing agent in organic synthesis. Other possible uses of oxalic acid are:
  • added in chromic acid for anodization of Al alloy, to improve corrosion resistance.
  • additive for ozone treatment of cellulose.

General description

Potassium and calcium salts of oxalic acid dehydrate are found in nature in the cell sap of Oxalis and Rumex. Detailed analysis of the crystal structure has been reported.

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

Hazard Classifications

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

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Substances Subject to be Indicated Names

ishl_indicated

Substances Subject to be Notified Names

ishl_notified

752835-BULK: + 752835-VAR: + 752835-25G:4548173985404

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Zhang, X. Y.; et al.
Journal of Materials Chemistry, 11, 1732-1732 (2001)
Pradyot Patnaik
A Comprehensive Guide to the Hazardous Properties of Chemical Substances null
A refinement of the crystal structure analyses of oxalic acid dihydrate.
Ahmed FR and Cruickshank DWJ
Acta Crystallographica, 6(5), 385-392 (1953)
Xu, C.; et al.
Chemical Physics Letters, 366, 567-567 (2002)
Paul A Nakata
PloS one, 10(10), e0141982-e0141982 (2015-10-31)
The establishment of new approaches to control chewing insects has been sought not only for direct use in reducing crop loss but also in managing resistance to the pesticides already in use. Engineered formation of calcium oxalate crystals is a
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