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681970

Sigma-Aldrich

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

97%

Synonym(s):

2-Carboxy-5-hydroxy-4-pyrone, Comenic acid

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About This Item

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

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

Related Categories

Application

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

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302

Hazard Classifications

Acute Tox. 4 Oral

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCR3740
MKBQ9649V
MKBP2628V
MKBH9304V
03604BJ

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Tetrahedron, 49, 2839-2839 (1993)

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