| Name | Formula | pKa1 |
|---|
| 5,6,7,8-tetrahydro-2-naphthol | C10H12O | 10.48 |
| 5-amino-2-hydroxybenzoic acid | C7H7NO3 | 2.74 |
| 5-amino-4-oxo-pentanoic acid | C5H9NO3 | 8.90 |
| 5-aminopentanoic acid | C5H11NO2 | 4.27 |
| 5-aminotetrazole | CH3N5 | 5.95 |
| 5-bromo-2-hydroxy-N,3-dimethylbenzamide | C9H10BrNO2 | 7.52 |
| 5-bromo-2-hydroxybenzoic acid | C7H5BrO3 | 2.61 |
| 5-bromo-N-(4-chlorophenyl)-2-hydroxybenzamide | C13H9BrClNO2 | 6.00 |
| 5-butyl-5-prop-2-enyl-1,3-diazinane-2,4,6-trione | C11H16N2O3 | 7.98 |
| 5-chloro-2-benzoxazolinone | C7H4ClNO2 | 8.24 |
| 5-chloro-2-hydroxy-N-(2-methylphenyl)benzamide | C14H12ClNO2 | 6.60 |
| 5-chloro-2-hydroxy-N-phenylbenzamide | C13H10ClNO2 | 6.17 |
| 5-chloro-2-hydroxybenzoic acid | C7H5ClO3 | 2.63 |
| 5-chloro-2-nitrophenol | C6H4ClNO3 | 6.05 |
| 5-fluoro-2-nitrophenol | C6H4FNO3 | 6.07 |
| 5-hexenoic acid | C6H10O2 | 4.72 |
| 5-indanol | C9H10O | 10.32 |
| 5-isopropylbarbituric acid | C7H10N2O3 | 4.94 |
| 5-mercapto-1-methyltetrazole | C2H4N4S | 3.28 |
| 5-methyl-2-nitrophenol | C7H7NO3 | 7.41 |
| 5-methyl-5-phenyl-1,3-diazinane-2,4,6-trione | C11H10N2O3 | 7.73 |
| 5-nitrosalicylanilide | C13H10N2O4 | 3.03 |
| 5-norbornene-2-endo,3-exo-dicarboxylic acid | C9H10O4 | 4.06 |
| 5-oxohexanoic acid | C6H10O3 | 4.66 |
| 5-phenylpentanoic acid | C11H14O2 | 4.88 |