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-1.875 15.1094 -2.7656 Q14.3828 -3.6562 12.9609 -3.6562 Q11.5391 -3.6562 10.7969 -2.7578 Q10.0547 -1.8594 10.0547 -0.1406 Z"></path></g></g></svg></svg></svg></svg></svg></div></app-svg-box></div></app-multi-image><h3 _ngcontent-sc115="" class="name">CAS Name</h3><span _ngcontent-sc115="" class="casName">Ethanedioic acid hydrate (1:2)</span><h3 _ngcontent-sc115="" class="molecularFormula">Molecular Formula</h3><span _ngcontent-sc115="" id="molform">C<sub>2</sub>H<sub>2</sub>O<sub>4</sub>.2H<sub>2</sub>O</span><h3 _ngcontent-sc115="" class="molecularMass">Molecular Mass</h3> 126.07 <button _ngcontent-sc115="" class="view-sfn-button">Discover more in SciFinder</button><div _ngcontent-sc115="" class="page-citation"><h3 _ngcontent-sc115="">Cite this Page</h3><span _ngcontent-sc115="" class="name">Ethanedioic acid hydrate (1:2)</span>.   <em _ngcontent-sc115="">CAS Common Chemistry</em>.   CAS, a division of the American Chemical Society, n.d.   <span _ngcontent-sc115="" class="url">http://commonchemistry.cas.org/detail?cas_rn=6153-56-6</span> (retrieved <span _ngcontent-sc115="" class="timestamp">2025-03-26</span>) (CAS RN: <span _ngcontent-sc115="" class="casRn">6153-56-6</span>).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). </div></div></detail-summary></div><div _ngcontent-sc118="" class="col-lg-8 col-md-7 no-padding"><detail-ancillary _ngcontent-sc118="" _nghost-sc117=""><div _ngcontent-sc117="" class="detail-content-box detail-content-box-right"><h2 _ngcontent-sc117="" class="compoundPropertiesHeader">Compound Properties</h2><ul _ngcontent-sc117="" class="properties"><li _ngcontent-sc117=""><h3 _ngcontent-sc117="" class="property-name">Melting Point (1)</h3><span _ngcontent-sc117="" class="property-value">102 °C</span></li><li _ngcontent-sc117=""><h3 _ngcontent-sc117="" class="property-name">Density (2)</h3><span _ngcontent-sc117="" class="property-value">1.65 g/cm³ @ Temp: 25 °C</span></li></ul><h3 _ngcontent-sc117="">Source(s)</h3><ul _ngcontent-sc117="" class="sources"><li _ngcontent-sc117=""><span _ngcontent-sc117="">(1) International Chemical Safety Cards data were obtained from the National Institute for Occupational Safety and Health (US)</span></li><li _ngcontent-sc117=""><span _ngcontent-sc117=""><a _ngcontent-sc117="" href="#goToSfn">(2) Peng, Chao; Journal of Physical Chemistry A, (2016), 120(7), 1029-1038, CAplus</a></span></li></ul></div></detail-ancillary><detail-info _ngcontent-sc118="" _nghost-sc116=""><div _ngcontent-sc116="" class="detail-content-box detail-content-box-right"><h2 _ngcontent-sc116="">Other Names and Identifiers</h2><h3 _ngcontent-sc116="" class="inchi">InChI</h3><p _ngcontent-sc116="" class="identifier">InChI=1S/C2H2O4.2H2O/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);2*1H2</p><h3 _ngcontent-sc116="" class="inchiKey">InChIKey</h3><p _ngcontent-sc116="" class="identifier">InChIKey=GEVPUGOOGXGPIO-UHFFFAOYSA-N</p><h3 _ngcontent-sc116="" class="smile">SMILES</h3><p _ngcontent-sc116="" class="identifier">C(C(O)=O)(O)=O.O</p><h3 _ngcontent-sc116="" class="canonicalSmile">Canonical SMILES</h3><p _ngcontent-sc116="" class="identifier">O=C(O)C(=O)O.O</p><h3 _ngcontent-sc116="" class="synonyms">Other Names for this Substance</h3><div _ngcontent-sc116="" class="detail-synonym-box"><ul _ngcontent-sc116=""><li _ngcontent-sc116="">Ethanedioic acid, hydrate (1:2)</li><li _ngcontent-sc116="">Oxalic acid, dihydrate</li><li _ngcontent-sc116="">Ethanedioic acid, dihydrate</li><li _ngcontent-sc116="">Ethanedioic acid hydrate (1:2)</li><li _ngcontent-sc116="">Oxybee</li></ul></div><div _ngcontent-sc116="" class="synonyms-toggle"><p _ngcontent-sc116=""><a _ngcontent-sc116="">View All</a></p></div><h2 _ngcontent-sc116="" class="deletedOrReplacedRns">Deleted or Replaced CAS Registry Numbers</h2><p _ngcontent-sc116="">2602619-84-9, 2770108-61-5, 2958638-19-0</p></div></detail-info></div></div><div _ngcontent-sc118="" class="insight-teaser"><app-insight-teaser 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By using CAS Common Chemistry, you agree to the terms and conditions of this license. </div></app-license></div></div><ngx-json-ld _ngcontent-sc118=""><script type="application/ld+json">{ "@context": "http://schema.org", "@type": "ChemicalSubstance", "name": "Ethanedioic acid hydrate (1:2)", "url": "http://commonchemistry.cas.org/detail?cas_rn=6153-56-6", "hasBioChemEntityPart": { "@type": "MolecularEntity", "name": "Ethanedioic acid hydrate (1:2)", "identifier": "InChI=1S/C2H2O4.2H2O/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);2*1H2", "molecularFormula": "C<sub>2</sub>H<sub>2</sub>O<sub>4</sub>.2H<sub>2</sub>O" }, "chemicalComposition": "C<sub>2</sub>H<sub>2</sub>O<sub>4</sub>.2H<sub>2</sub>O", "alternateNames": [ "Ethanedioic acid, hydrate (1:2)", "Oxalic acid, dihydrate", "Ethanedioic acid, dihydrate", "Ethanedioic acid hydrate (1:2)", "Oxybee", "Dany's BienenWohl" ] }</script></ngx-json-ld></app-detail><app-footer _ngcontent-sc103="" _nghost-sc102=""><div _ngcontent-sc102="" 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