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7-Hydroxy-4-methylcoumarin [4-Methylumbelliferone] *Fluorescence reference standard*

This compound is used as a calibration standard for 7-hydroxy-4-methylcoumarin-based enzyme substrates. It has pH-dependent fluorescence.
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Catalog Number41
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Physical properties
Molecular weight176.17
SolventDMSO
Spectral properties
Correction Factor (280 nm)0.1
Extinction coefficient (cm -1 M -1)18000
Excitation (nm)360
Emission (nm)448
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12171501
CAS90-33-5
Platform

Fluorescence microplate reader

Recommended plateBlack wall, clear bottom
Instrument specification(s)Bottom read mode
Calculators

Common stock solution preparation

Table 1. Volume of DMSO needed to reconstitute specific mass of 7-Hydroxy-4-methylcoumarin [4-Methylumbelliferone] *Fluorescence reference standard* to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

0.1 mg0.5 mg1 mg5 mg10 mg
1 mM567.634 µL2.838 mL5.676 mL28.382 mL56.763 mL
5 mM113.527 µL567.634 µL1.135 mL5.676 mL11.353 mL
10 mM56.763 µL283.817 µL567.634 µL2.838 mL5.676 mL

Molarity calculator

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Spectrum
References
View all 19 references: Citation Explorer
Excited state properties of 7-hydroxy-4-methylcoumarin in the gas phase and in solution. A theoretical study
Authors: Georgieva I, Trendafilova N, Aquino A, Lischka H.
Journal: J Phys Chem A Mol Spectrosc Kinet Environ Gen Theory (2005): 11860
Novel thiocoumarins as inhibitors of TNF-alpha induced ICAM-1 expression on human umbilical vein endothelial cells (HUVECs) and microsomal lipid peroxidation
Authors: Kumar S, Singh BK, Kalra N, Kumar V, Kumar A, Prasad AK, Raj HG, Parmar VS, Ghosh B.
Journal: Bioorg Med Chem (2005): 1605
Stability of the complexes of some lanthanides with coumarin derivatives. I. Cerium(III)-4-methyl-7-hydroxycoumarin
Authors: Kostova IP, Manolov, II, Radulova MK.
Journal: Acta Pharm (2004): 37
Measurement of enzyme kinetics using microscale steady-state kinetic analysis
Authors: Gleason NJ, Carbeck JD.
Journal: Langmuir (2004): 6374
Structural requirements of hydroxylated coumarins for in vitro anti-Helicobacter pylori activity
Authors: Kawase M, Tanaka T, Sohara Y, Tani S, Sakagami H, Hauer H, Chatterjee SS.
Journal: In Vivo (2003): 509