Thymol Blue - molar absorptivity I did a lab about spectrophotometry and right now I need the molar absorptivity(ε) of thymol blue in acidic solution and also in basic solution. I have tried looking online but I haven't found the data I need.

What is the molar absorptivity of thymol blue in acidic solution and in basic solution?
 information
The specific wavelength is 540.27 nm for the acid and 601.88 nm  for the base.
First of all, molar absorptivity is dependent on wavelength, so you either need to specify a wavelength or you need the entire spectrum.

When searching for absorptivity, it's often effective to search for the older name 'extinction coefficient'. Using that search term in Google, I found an absorption spectrum for thymol blue here (pdf).