752835

Oxalic acid dihydrate

99.999% trace metals basis

• Synonym(s): Ethanedioic acid dihydrate
• Linear Formula: HO₂CCO₂H · 2H₂O
• CAS Number: 6153-56-6
• Molecular Weight: 126.07
• Beilstein/REAXYS Number: 3679436
• EC Number: 205-634-3
• MDL number: MFCD00149102
• UNSPSC Code: 12352100
• PubChem Substance ID: 329766316

Properties

• 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.)
• 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

Potassium and calcium salts of oxalic acid dehydrate are found in nature in the cell sap of Oxalis and Rumex.[1] Detailed analysis of the crystal structure has been reported.[2]

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.[1]

Safety Information

• 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
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable