Selecting an appropriate buffer | pH and buffer solutions | Fundamental laboratory techniques
MOPS, Free Acid, Ultrol Grade - CAS 1132-61-2 - Calbiochem A zwitterionic buffer useful in the pH range of 6.5-7.9. Has a pKa of 7.20 at 25 C. Absorbance (1.0 M, H2O, 260 nm): 0.05. 1132-61-2
File:Useful pH range of buffers.png - Wikimedia Commons