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 coefficient 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.