Dissociation Constants Of Organic Acids And Bases
	This table lists the acid-base dissociation constants of over 600 organic compounds, including many amino acids.  All data apply to
	dilute aqueous solutions and are presented in the form of pKa, which is the negative of the logarithm of the acid dissociation constant Ka.
	Molecular formula		Name		Step		TI°C		pKa
	CH2O2		Formic acid				20		3.75
	CH4N2O		Urea				21		0.10
	CH5N		Methylamine				25		10.63
	C2HCl3O2		Trichloroacetic acid				25		0.70
	C2H2Cl2O2		Dichloroacetic acid				25		1.48
	C2H2O3		Glyoxylic				25		3.18
	C2H2O4		Oxalic acid		1		25		1.23
					2		25		4.19
	C2H3BrO2		Bromoacetic acid				25		2.69
	C2H3ClO2		Chloroacetic acid				25		2.85
	C2H3IO2		Iodoacetic acid				25		3.12
	C2H4OS		Thioacetic acid				25		3.33
	C2H4O2		Acetic acid				25		4.76
	C2H4O3		Glycolic acid				25		3.83
	C2H5N		Ethyleneimine				25		8.01
	C2H5NO		Acetamide				25		0.63
	C2H5NO2		Glycine		1		25		2.35
					2		25		9.78
	C2H6O2		Ethylene glycol				25		14.22
	C2H7AsO2		Cacodylic acid		1		25		1.57
					2		25		6.27
	C2H7N		Dimethylamine				25		10.68
	C2H7N		Ethylamine				25		10.70
	C2H7NO		Ethanolamine				25		9.50
	C2H7NO3S		Taurine		1		25		1.5
					2		25		9.061
	C2H7NS		Cysteamine		1		25		8.35
					2		25		10.81
	C2H8N2		1,2-Ethanediamine		1		0		10.712
					2		0		7.564
	C3H3NO2		Cyanoacetic acid				25		2.45
	C3H3NS		Thiazole				20		2.44
	C3H4N2		1H-Imidazole				25		6.953
	C3H4N2S		2-Thiazolamine				20		5.36
	C3H4O2		Acrylic acid				25		4.25
	C3H4O3		Pyruvic acid				25		2.39
	C3H4O4		Malonic acid		1		25		2.83
					2		25		5.69
	C3H5ClO2		2-Chloropropanoic acid				25		2.83
	C3H5ClO2		3-Chloropropanoic acid				25		3.98
	C3H6N6		Melamine				25		5.00
	C3H6O2		Propanoic acid				25		4.86
	C3H6O3		3-Hydroxypropanoic acid				25		4.51
	C3H6O3		Lactic acid				100		3.08
	C3H6O4		Glyceric acid				25		3.52
	C3H7N		Azetidine				25		11.29
	C3H7NO2		L-Alanine		1		25		2.34
					2		25		9.87
	C3H7NO2		b-Alanine		1		25		3.55
					2		25		10.24
	C3H7NO2		Methylglycine		1		25		2.21
					2		25		10.12
	C3H7NO2S		Cysteine		1		25		1.92
					2		25		8.37
					3		25		10.70
	C3H7NO3		Serine		1		25		2.19
					2		25		9.21
	C3H7NO5S		l-Cysteic acid		1		25		1.3
					2		25		1.9
					3		25		8.70
	C3H7N3O2		Glycocyamine				25		2.82
	C3H8O3		Glycerol				25		14.15
	C3H9N		Propylamine				20		10.60
	C3H9N		Trimethylamine				25		9.80
	C3H9NO		1-Amino-2-methoxyethane				10		9.89
	C3H9NO		Trimethylamine oxide				25		4.65
	C3H10N2		1,2-Propanediamine		1		25		9.82
					2		25		6.61
	C3H10N2		1,3-Propanediamine		1		10		10.94
					2		10		9.03
	C3H11N3		1,2,3-Triaminopropane		1		20		9.59
					2		20		7.95
	C4H4N2		Pyrazine				27		0.65
	C4H4N2		Pyridazine				20		2.24
	C4H4N2O3		Barbituric acid				25		4.01
	C4H4N2O5		Alloxanic acid				25		6.64
	C4H4N4O2		5-Nitropyrimidinamine				20		0.35
	C4H4O4		trans-Fumaric acid		1		18		3.03
					2		18		4.44
	C4H4O4		Maleic acid		1		25		1.83
					2		25		6.07
	C4H4O5		Oxaloacetic acid		1		25		2.22
					2		25		3.89
					3		25		13.03
	C4H5N3		2-Pyrimidinamine				20		3.45
	C4H6N2		1-Methylimidazol				25		6.95
	C4H6N4O3		Allantoin				25		8.96
	C4H6O2		3-Butenoic acid				25		4.34
	C4H6O2		trans-Crotonic acid				25		4.69
	C4H6O3		Acetoacetic acid				18		3.58
	C4H6O3		2-Oxobutanoic acid				25		2.50
	C4H6O4		Methymalonic acid		1		25		3.07
					2		25		5.76
	C4H6O4		Succinic acid		1		25		4.16
					2		25		5.61
	C4H6O5		Malic acid		1		25		3.40
					2		25		5.11
	C4H6O6		a-Tartaric acid		1		25		2.98
					2		25		4.34
	C4H6O6		meso-Tartaric acid		1		25		3.22
					2		25		4.82
	C4H6O8		Dihydroxytartaric acid				25		1.92
	C4H7CIO2		2-Chlorobutanoic acid				RT		2.86
	C4H7CIO2		3-Chlorobutanoic acid				RT		4.05
	C4H7CIO2		4-Chlorobutanoic acid				RT		4.52
	C4H7NO2		4-Cyanobutanoic acid				25		2.42
	C4H7NO3		N-Acetylglycine				25		3.669
	C4H7NO4		Aspartic acid		1		25		1.99
					2		25		3.90
					3		25		9.90
	C4H7N3O		Creatinine		1		25		4.83
					2				9.2
	C4H8N2O3		Asparagine		1		20		2.17
					2		20		8.80
	C4H8N2O3		N-Glycylglycine				25		3.139
	C4H8O2		Butanoic acid				25		4.83
	C4H8O2		2-Methylpropanoic acid				25		4.88
	C4H8O3		3-Hydroxybutanoic acid				25		4.70
	C4H8O3		4-Hydroxybutanoic acid				25		4.72
	C4H9N		Pyrrolidine				25		11.27
	C4H9NO		Morpholine				25		8.33
	C4H9NO2		2-Aminobutanoic acid		1		25		2.29
					2		25		9.83
	C4H9NO2		4-Aminobutanoic acid		1		25		4.031
					2		25		10.556
	C4H9NO2		N,N-Dimethylglycine				25		9.89
	C4H9NO2		2-Methylalanine		1		25		2.36
					2		25		10.21
	C4H9NO2S		Homocysteine		1		25		2.22
					2		25		8.87
					3		25		10.86
	C4H9NO3		Homoserine		1		25		2.71
					2		25		9.62
	C4H9NO3		DL-Methoxyalanine				25		2.037
	C4H9NO3		Threonine		1		25		2.09
					2		25		9.10
	C4H9N3O2		Creatine		1		25		2.63
					2		25		14.3
	C4H10N2		Piperazine		1		23		9.83
					2		23		5.56
	C4H10N2O2		2,4-Diaminobutanoic acid		1		25		1.85
					2		25		8.24
					3		25		10.44
	C4H11N		Butylamine				20		10.77
	C4H11N		sec-Butylamine				25		10.56
	C4H11N		tert-Butylamine				25		10.68
	C4H11N		Diethylamine				40		11.02
	C4H12N2		1,4-Butanediamine		1		20		10.80
					2		20		9.35
	C4H12O2		1,2-Dimethylaminoethane		1		25		10.40
					2		25		8.26
	C5H4BrN		3-Bromopyridine				25		2.84
	C5H4CIN		3-Chloropyridine				25		2.84
	C5H4N4		Purine		1		20		2.30
					2		20		8.96
	C5H4N4O3		Uric acid				12		3.89
	C5H5N		Pyridine				25		5.25
	C5H5NO		4-Pyridinol		1		20		3.20
					2		20		11.12
	C5H5NO		2(1H)-Pyridinone		1		20		0.75
					2		20		11.65
	C5H5N5		1H-Purin-6-amine		1		25		4.12
					2		25		9.83
	C5H6N2		2-Methylpyrazine				27		1.45
	C5H6N2		2-Pyridinamine				20		6.82
	C5H6N2		4-Pyridinamine				25		9.114
	C5H6O4		1,1-Cyclopropanedicarboxylic acid		1		25		1.82
					2		25		7.43
	C5H6O4		Itaconic acid		1		25		3.85
					2		25		5.45
	C5H6O4		Mesaconic acid		1		25		3.09
					2		25		4.75
	C5H6O5		2-Oxoglutaric acid		1		25		2.47
					2		25		4.68
	C5H7NO3		L-2-Pyrrolidone-5-carboxylic acid				25		3.32
	C5H7N3		Methylaminopyrazine				25		3.39
	C5H7N3		2,5-Pyridinediamine				20		6.48
	C5H8N2		2,4-Dimethylimidazzol				25		8.36
	C5H8O4		Dimethylmalonic acid				25		3.15
	C5H8O4		Glutaric acid		1		25		4.31
					2		25		5.41
	C5H8O4		Methylsuccinic acid		1		25		4.13
					2		25		5.64
	C5H9NO2		Proline		1		25		1.952
					2		25		10.64
	C5H9NO3		5-Aminolevulinic acid		1		25		4.05
					2		25		8.90
	C5H9NO3		trans-4-Hydroxyroline		1		25		1.818
					2		25		9.662
	C5H9NO3		8-Hydroxypurine		1		20		2.56
					2		20		8.26
	C5H9NO4		L-Glutamic acid		1		25		2.13
					2		25		4.31
	C5H9N3		Histamine		1		25		6.04
					2		25		9.75
	C5H10N2O2		Diaminopimelic acid		1		25		1.8
					2		25		2.2
					3		25		8.8
					4		25		9.9
	C5H10N2O3		L-Glutamine		1		25		2.17
					2		25		9.13
	C5H10N2O3		Glycylalanine				25		3.15
	C5H10N2O4		Glycylserine		1		25		2.98
					2		25		8.38
	C5H10O2		2-Methylbutanoic acid				25		4.80
	C5H10O2		3-Methylbutanoic acid				25		4.77
	C5H10O2		Pentanoic acid				25		4.84
	C5H10O2		Trimethylacetic acid				25		5.03
	C5H11N		N-Methylpyrrolidine				25		10.32
	C5H11N		Piperidine				25		11.123
	C5H11NO2		5-Aminopentanoic acid		1		25		4.27
					2		25		10.766
	C5H11NO2		Betaine				0		1.83
	C5H11NO2		Norvaline		1		25		2.32
					2		25		9.81
	C5H11NO2		N-Propylglycine		1		25		2.35
					2		25		10.19
	C5H11NO2		Valine		1		25		2.29
					2		25		9.74
	C5H11NO2S		Methionine		1		25		2.13
					2		25		9.27
	C5H12N2O2		Ornithine		1		25		1.705
					2		25		8.69
					3		25		10.76
	C5H13N		1-Aminno-2,2-dimethylpropane				25		10.15
	C5H13N		Diethylmethylamine				25		10.35
	C5H13N		3-Methyl-1-butanamine				25		10.60
	C5H13N		2-Methyl 2-butanamine				19		10.85
	C5H13N		3-Pentanamine				17		10.59
	C5H13N		Pentylamine				25		10.63
	C5H14NO		Choline				25		13.9
	C5H14N2		Cadaverine		1		25		10.05
					2		25		10.93
	C6H3CIN4		6-Cbloropteridine				20		3.68
	C6H3N3O7		Picric acid				25		0.38
	C6H4Cl2O		2,3-Dichlorophenol				25		7.44
	C6H4N2O3		5-Hydroxylysine				25		2.13