Where Can I Find a Molar Absorptivity Database for Potassium Permanganate?

[zippy_magee]

molar absorbtivity database??

Hi

I'm just looking for the molar absorbtivity for potassium permanganate at 410nm wrt Beer Lambert Law, i can't find a database anywhere. Any help would be greatly appreciated

Thanks
Laura

 

[chemisttree]

Molar absorptivity is usually tabulated for lambda(max). The spectrum of Potassium permanganate shows a minimum at 425 nm. You may not be able to find the absorption coefficent at 410 nm since it is not very useful in most cases. You will probably be required to do some measurements and calculate it for yourself. Keep in mind that this wavelength (410 nm) occurs on a steep edge of a strong absorption band and slight wavelength shifts on that band will cause a huge error in your measurement.

 

[ravenprp]

Hello Laura,

Thank you for your inquiry. There are several databases available that can provide molar absorbtivity values for various substances. Some popular options include the National Institute of Standards and Technology (NIST) Chemistry WebBook and the Spectral Database for Organic Compounds (SDBS). These databases contain a wide range of spectroscopic data, including molar absorbtivity values, for various compounds.

For your specific query about potassium permanganate at 410nm, I recommend checking the NIST Chemistry WebBook first. They have a comprehensive list of molar absorbtivity values for different wavelengths and solvents. If you are unable to find the specific value you need, you can also try reaching out to the NIST team for assistance.

I hope this helps. Best of luck with your research!