λmax log ε
Indophenol (MeOH) 262 4.19
Bromophenol Blue (water) 440 3.48
Ref. CRC Handbook of Chemistry & Physics, 59th Ed. 1978-9. (only those solvents)
I'm working on Trypan Blue.
Hi, sorry for the very late answer, but I needed this data in the research and it seemed strange for me. Couldn'd find these in CRC (my bad), so I checked it myself.
For BPB the ε in water at 438 nm is 24429 ±1100, at 591 nm is 86317 ±5983
The range of concentrations from 10-5
at pH 2 and 11 respectively
It seems for me that at CRC the ε for BPB is given for MeOH, as I received
For BPB the ε in MeOH at 424 nm is 3501±1133, at 596 nm is 95959 ±2257
all ε are L mol-1
The plots are in the attachment