6-Methoxy-4-methylcoumarin is a natural product from Eupatorium pauciflorum.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months(2-8C)
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Study of dipole moments of some coumarin derivatives.[Reference: WebLink
In this paper we report the dipole moments of two coumarin derivatives viz 6-Methoxy-4-methylcoumarin (6MMC) and 6-hydroxy-4-methylcoumarin (6HMC).
METHODS AND RESULTS:
Solvatochromic shift in absorption and emission spectra as a function of different solvent polarity parameter has been analyzed. With the help of this, ground and first excited state dipole moments of two coumarin derivatives have been calculated. Dipole moments are also estimated theoretically. The first excited state dipole moment of both the coumarin derivatives is higher than the ground state dipole moment indicating a substantial redistribution of π-electron density in the excited state.