James Richard Fromm
| Common Name | Formula | Constant | pKa |
| Acetic Acid | CH3COOH | 1.75 x 10-5 | 4.756 |
| Ammonium Ion | NH4+ | 5.60 x 10-10 | 9.252 |
| Anilinium Ion | C6H5NH3+ | 2.54 x 10-5 | 4.596 |
| Benzoic Acid | C6H5COOH | 6.31 x 10-5 | 4.200 |
| Chloroacetic Acid | CH2ClCOOH | 1.36 x 10-3 | 2.866 |
| Cyanic Acid | HOCN | 3.54 x 10-4 | 3.451 |
| Dichloroacetic Acid | CHCl2COOH | 5.68 x 10-2 | 1.246 |
| Dimethylammonium Ion | (H3C)2NH2+ | 1.82 x 10-11 | 10.739 |
| Ethanol | CH3CH2OH | 1.31 x 10-14 | 13.882 |
| Formic Acid | HCOOH | 1.86 x 10-4 | 3.732 |
| Hydrazoic Acid | HN3 | 2.37 x 10-5 | 4.625 |
| Hydrazinium Ion | H2NNH3+ | 1.03 x 10-8 | 7.989 |
| Hydrochloric Acid | HCl | Greater than 1 | Negative |
| Hydrocyanic Acid | HCN | 5.85 x 10-10 | 9.233 |
| Hydrofluoric Acid | HF | 6.94 x 10-4 | 3.159 |
| Hydroxylammonium Ion | HONH3+ | 1.12 x 10-6 | 5.951 |
| Hypochlorous Acid | HClO | 2.81 x 10-8 | 7.551 |
| Imidazolium Ion | C3H3NNH2+ | 1.02 x 10-7 | 6.992 |
| Lactic Acid | H3CCHOHCOOH | 1.37 x 10-4 | 3.863 |
| Methylammonium Ion | H3CNH3+ | 2.39 x 10-11 | 10.622 |
| Ethanolammonium Ion | HOCH2CH2NH3+ | 3.17 x 10-10 | 9.499 |
| Nitric Acid | HNO3 | 27.79 | -1.444 |
| Nitrous Acid | HNO2 | 5.98 x 10-4 | 3.224 |
| Perchloric Acid | HClO4 | 38.29 | -1.583 |
| Phenol | C6H5OH | 1.08 x 10-10 | 9.968 |
| Pyridinium Ion | C5H5NH+ | 6.80 x 10-6 | 5.167 |
| Trimethylammonium Ion | (H3C)3NH+ | 1.72 x 10-10 | 9.763 |
| Water | H2O | 1.01 x 10-14 | 13.994 |