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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:
Molecular Weight:
156.09
EC Number:
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.22

Assay

97%

form

solid

mp

284-294 °C

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

Application

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

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

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

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

681970-1G:
681970-BULK:
681970-VAR:
681970-5G:


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Tetrahedron, 49, 2839-2839 (1993)

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