Data Source

 

These books are compilations of experimental pKa values sponsored by the International Union of Pure and Applied Chemistry (IUPAC)

Aqueous
Non-Aqueous
 
"The critical assessment of data quality is one of the major features of this seminal group of pKa compilations for weak organic acids and bases sponsored by the International Union of Pure and Applied Chemistry (IUPAC)"

from Profiles of Drug Substances, Excipients and Related Methodology Volume 33,
by Richard J. Prankerd, ed Harry G. Brittain