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55634

Sigma-Aldrich

7-Hydroxy-4-methyl-3-coumarinylacetic acid

suitable for fluorescence, ≥98.0% (HPLC)

Synonym(s):

4-Methylumbelliferone-3-acetic acid

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About This Item

Empirical Formula (Hill Notation):
C12H10O5
CAS Number:
Molecular Weight:
234.20
Beilstein/REAXYS Number:
220399
MDL number:
UNSPSC Code:
12352200
PubChem Substance ID:
NACRES:
NA.32

assay

≥98.0% (HPLC)

form

solid

solubility

DMF: soluble
DMSO: soluble

fluorescence

λex 360 nm; λem ~450 nm in 0.1 M Tris pH 9.0

suitability

suitable for fluorescence

SMILES string

CC1=C(CC(O)=O)C(=O)Oc2cc(O)ccc12

InChI

1S/C12H10O5/c1-6-8-3-2-7(13)4-10(8)17-12(16)9(6)5-11(14)15/h2-4,13H,5H2,1H3,(H,14,15)

InChI key

OOGKDHCQSZAEQI-UHFFFAOYSA-N

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Application

suitable as pH-indicator

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

pictograms

Exclamation mark

signalword

Warning

Hazard Classifications

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

target_organs

Respiratory system

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


Certificates of Analysis (COA)

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Krzysztof Żamojć et al.
Journal of fluorescence, 24(3), 713-718 (2013-12-18)
The fluorescence quenching of different coumarin derivatives (7-hydroxy-4-methylcoumarin, 5,7-dimethoxycoumarin, 7-amino-4-methyl-3-coumarinylacetic acid, 7-ethoxy-4-methylcoumarin, 7-methoxycoumarin, 7-hydroxycoumarin, 7-hydroxy-4-methyl-3-coumarinylacetic acid and 7-amino-4-methylcoumarin) by 4-hydroxy-TEMPO in aqueous solutions at the room temperature was studied with the use of UV-Vis absorption spectroscopy as well as a

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