681970

5-Hydroxy-4-oxo-4H-pyran-2-carboxylic acid

97%

• Synonym(s): 2-Carboxy-5-hydroxy-4-pyrone, Comenic acid
• Empirical Formula (Hill Notation): C₆H₄O₅
• CAS Number: 499-78-5
• Molecular Weight: 156.09
• EC Number: 207-891-7
• MDL number: MFCD03085981
• UNSPSC Code: 12352100
• PubChem Substance ID: 24885670
• NACRES: NA.22

Properties

• Quality Level: 100
• assay: 97%
• form: solid
• mp: 284-294 °C
• functional group: carboxylic acid; ether; ketone
• SMILES string: OC(=O)C1=CC(=O)C(O)=CO1
• InChI: 1S/C6H4O5/c7-3-1-5(6(9)10)11-2-4(3)8/h1-2,8H,(H,9,10)
• InChI key: UUUICOMMFFTCHS-UHFFFAOYSA-N

Description

Application

Building block for an intramolecular olefin-α-pyrone cycloaddition providing the colchicine ring skeleton.

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H302
• Hazard Classifications: Acute Tox. 4 Oral
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Gloves