Buffers and therir pK values at 25°C
| Trivial name Phosphate (pK1) Malate (pK1) Formate Succinate (pK1) Citrate (pK2) Acetate Malate Pyridine Succinate (pK2) MES Cacodylate Dimethylglutarate Carbonate (pK1) Citrate (pK3) Bis-Tris ADA Pyrophosphate EDPS (pK1) Bis-Tris propane PIPES ACES MOPSO Imidazole BES MOPS Phosphate (pK2) EMTA TES HEPES DIPSO TEA POPSO EPPS, HEPPS Tris Tricine Glycinamide PIPPS Glycylglycine (pK2) Bicine TAPS Morpholine PIBS AES Borate Ammonia Ethanolamine CHES Glycine EDPS APS Carbonate (pK2) Caps Piperidine Phosphate (pK3) |
pKa
2.15 3.40 3.75 4.21 4.76 4.76 5.13 5.23 5.64 6.10 6.27 6.34 6.35 6.40 6.46 6.59 6.60 6.65 6.80 6.76 7.78 6.95 6.95 7.09 7.20 7.20 7.23 7.40 7.48 7.60 7.76 7.85 8.00 8.06 8.05 8.06 8.10 8.25 8.26 8.40 8.49 8.60 9.06 9.23 9.25 9.50 9.55 9.78 9.80 9.89 10.33 10.40 11.12 12.33 |
d pKa/dt
0.0044 - 0.0 -0.0018 -0.0016 0.0002 - -0.014 0.0 -0.011 - 0.0060 -0.0055 0.0 0.0 -0.011 - - - -0.0085 -0.020 -0.015 -0.020 -0.016 0.015 -0.0028 - -0.020 -0.014 -0.015 -0.020 -0.013 - -0.028 -0.021 -0.029 - -0.025 -0.018 0.018 - - -0.022 -0.008 -0.031 -0.029 0.029 -0.025 - - -0.009 0.032 - -0.026 |