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417491

Sigma-Aldrich

6-Methylchromone-2-carboxylic acid

98%

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About This Item

Empirical Formula (Hill Notation):
C11H8O4
CAS Number:
Molecular Weight:
204.18
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.22

Quality Level

Assay

98%

form

solid

mp

267-270 °C (lit.)

functional group

carboxylic acid
ketone

SMILES string

Cc1ccc2OC(=CC(=O)c2c1)C(O)=O

InChI

1S/C11H8O4/c1-6-2-3-9-7(4-6)8(12)5-10(15-9)11(13)14/h2-5H,1H3,(H,13,14)

InChI key

RKIDLZFIIVDZNX-UHFFFAOYSA-N

General description

6-Methylchromone-2-carboxylic acid is a chromone derivative. Chromones are cyclic compounds containing nine carbon atoms with sp2 hybridization. They are commonly referred as 1,4-benzapyranes or γ-benzopyrones. Its energy of combustion was measured by an isoperibolic micro-combustion calorimeter. Standard molar enthalpy of formation derived from the energy of combustion, for 6-methylchromone-2-carboxylic acid was reported to be -(656.2 ± 2.2)kJmol-1.

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

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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The standard molar enthalpies of formation of chromone-3-carboxylic acid, 6-methylchromone-2-carboxylic acid, and 6-methyl-4-chromanone determined by micro-combustion calorimetry.
Flores H, et al.
Journal of Thermal Analysis and Calorimetry, 117(1), 433-437 (2014)

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