Table 2A. Protonation Constants of Phytate in Different Media and Ionic Strengths^b.

medium	ionic strength(mol L–1)	log K1a	log K2a	log K3	log K4	log K5	log K6	log K7	log K8	log K9	log K10	log K11	log K12
(C2H5)4NI	0.1	16.7	14.4	12.2	9.92	7.53	6.11	3.53
(n-C4H9)4NBr		>12	>12	>12	11.5	7.97	6.41	3.93	2.73	2	<1.5	<1.5	<1.5
LiCl		9.71	9.46	8.63	7.6	6.27	5	2.63
NaNO3		9.48	9.98	9.53	8.2	6.49	5.17	3.02
NaCl		9.58	9.84	9.5	8.14	6.5	5.25	2.88
KCl		10.2	9.5	9.93	8.37	6.62	5.35	2.93
CsCl		10.4	10.3	10.1	8.62	6.53	5.16	3.18
(CH3)4NCl	0.15	10.8	10.5	10.3	8.79	6.9	5.72	3.1	1.9	1.9
NaClO4	0.15	8.59	10.5	9.02	7.82	6.13	4.88	2.49	1.98
(C2H5)4NClO4	0.17	>13	>13	12.3	9.92	7.42	6.13	3.59	2	2.4	1	<1	<1
KCl	0.2	9.53	9.53	9.19	7.98	6.25	5.2	3.16	2.38	2.38	1.92	1.92	1.92
(C2H5)4NI	0.5	14.9	13.3	11.6	9.79	7.5	6.12	3.61
LiCl		9.06	8.81	7.96	6.93	5.63	4.39	2.08
NaNO3		8.73	9.39	8.82	7.57	5.88	4.59	2.6
NaCl		8.93	9.19	8.83	7.48	5.88	4.65	2.37
KCl		9.59	8.85	9.26	7.71	6.01	4.77	2.43
CsCl		9.79	9.54	9.51	7.93	5.78	4.51	2.49
(C2H5)4NI	1	13.6	12.5	11.1	9.71	7.5	6.16	3.72
LiCl		8.83	8.57	7.69	6.67	5.4	4.15	1.92
NaNO3		8.36	9.22	8.51	7.34	5.66	4.39	2.52
NaCl		8.69	8.95	8.56	7.21	5.65	4.42	2.22
NaClO4		8.41	9.19	8.29	7.03	5.38	4.14	1.77	1.8
KCl		9.35	8.61	8.99	7.45	5.77	4.54	2.28
CsCl		9.82	9.38	9.41	7.77	5.57	4.34	2.33
LiCl	3	8.6	8.34	7.34	6.35	5.18	3.95	2
NaCl		8.47	8.71	8.21	6.89	5.43	4.22	2.3
NaClO4		8.29	8.62	8.01	6.61	5.07	3.86	1.52	1.63
KCl		9.13	8.38	8.64	7.13	5.56	4.34	2.36
NaCl	5	8.5	8.74	8.12	6.83	5.47	4.27	2.63

^aPredicated values in italics.

^bAdapted from Crea et al.⁷⁹