Skip to Content
MilliporeSigma
All Photos(2)

Key Documents

View All Documentation

681970

Sigma-Aldrich

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

97%

Synonym(s):

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

Sign Into View Organizational & Contract Pricing
All Photos(2)

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

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

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
MKBQ9649V
MKBP2628V
MKBH9304V
03604BJ
02224AJ

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Tetrahedron, 49, 2839-2839 (1993)

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service