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93979

Sigma-Aldrich

Umbelliferone

suitable for fluorescence indicator, ≥98.0% (HPLC)

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Synonym(s):
7-Hydroxy-2H-1-benzopyran-2-one, 7-Hydroxycoumarin
Empirical Formula (Hill Notation):
C9H6O3
CAS Number:
Molecular Weight:
162.14
Beilstein/REAXYS Number:
127683
EC Number:
MDL number:
PubChem Substance ID:

Quality Level

assay

≥98.0% (HPLC)

form

crystals

mp

230 °C (dec.) (lit.)
230-233 °C

solubility

dioxane: soluble
ethanol: soluble

fluorescence

λex 325 nm; λem 452 nm in 0.1 M citrate pH 3.0

suitability

suitable for fluorescence indicator

SMILES string

Oc1ccc2C=CC(=O)Oc2c1

InChI

1S/C9H6O3/c10-7-3-1-6-2-4-9(11)12-8(6)5-7/h1-5,10H

InChI key

ORHBXUUXSCNDEV-UHFFFAOYSA-N

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This Item
U0383E1379C4261
Umbelliferone suitable for fluorescence indicator, ≥98.0% (HPLC)

93979

Umbelliferone

Umbelliferyl Arachidonate ethanol solution

U0383

Umbelliferyl Arachidonate

7-Ethoxycoumarin

E1379

7-Ethoxycoumarin

Coumarin ≥99% (HPLC)

C4261

Coumarin

solubility

dioxane: soluble, ethanol: soluble

solubility

DMSO: soluble 25 mg/mL, DMF: soluble 50 mg/mL, aqueous buffer: slightly soluble

solubility

95% ethanol: 50 mg/mL, clear to slightly hazy, colorless to faintly yellow

solubility

-

Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

200

mp

230 °C (dec.) (lit.)

mp

-

mp

88-90 °C (lit.)

mp

68-73 °C (lit.)

form

crystals

form

ethanol solution

form

powder

form

powder

fluorescence

λex 325 nm; λem 452 nm in 0.1 M citrate pH 3.0

fluorescence

-

fluorescence

λex 323 nm; λem 386 nm

fluorescence

-

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

ppe

dust mask type N95 (US), Eyeshields, Gloves


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In this study, we synthesized a simple but efficient quencher-free molecular beacon tethering 7-hydroxycoumarin on D-threoninol based on its pK(a) change. The pK(a) of 7-hydroxycoumarin in a single strand was determined as 8.8, whereas that intercalated in the duplex was

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