Absorption Coefficient of Acetonitrile in the Visible Spectrum

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The discussion centers around the molar absorption coefficient of acetonitrile, with a focus on its absorbance characteristics in the visible spectrum. It is noted that acetonitrile does not exhibit significant absorbance in the visible range, with absorbance measurements reported as low as 0.07 at 200 nm, which is deep in the UV spectrum. Participants suggest looking at Fisher catalogs for Optima grade details, confirming that acetonitrile has negligible absorbance down to 200 nm. The conversation shifts to seeking alternatives, specifically a liquid that is immiscible in water and absorbs in the visible spectrum, highlighting the miscibility of acetonitrile with water and the implications for experimental design.
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Does anyone know the molar absorption coefficient for acetonitrile? I need to know what wavelength the coefficient is at of course as well. Hopefully I can find one in the visible spectrum. My department does not have an ultra violet spectrophotometer.

I guess I should pick easier thermodynamic experiments :rolleyes:
 
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Acentonitrile does not have an appreciable visible absorbance.

Look in a Fisher catalog for the Optima grade. You will see that it has no appreciable absorbance down to 200 nm (deep in the UV!).

Absorbance (200nm) <= 0.07
 
thank you. I guess I will have to pick something else. Could anyone suggest a liquid immiscible in water that absorbs in the vis spectrum?
 
What is the solute and what, in general terms, are you trying to investigate?

BTW, acetonitrile is completely miscible in water. Good thing it didn't work out, yes?
 
i would suspect that acetonitrile is uv active
 

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