Liquid Junction Potential Calculator

LJPcalc Ion Charge and Conductivity Library

Notes

  • This document provides a table supplying elementary charge and molar conductivity for common ions.
  • All conductivities on this page assume ambient temperature (~25C).
  • Conductivities normalized to K (73.5) are suffixed with "*K".
  • Ions higher in the list are used by LJPcalc when duplicates are present.
  • Uncharged molecules (like glucose) don't conduct electricity in solution and therefore do not influence LJP
  • Large charged molecules (like EGTA and phosphocreatine) have low mobilities so their influence on LJP is negligible when solutions contain appreciable concentrations of small ions. Therefore, large molecules can be omitted from LJP calculations for most biological applications.

Langes Handbook of Chemistry

Fifteenth Edition, Table 8.32, page 997
http://fptl.ru/biblioteka/spravo4niki/dean.pdf

Inorganic Cations Charge Conductivity (E-4)
Ag +1 61.9
Al +3 61
Ba +2 63.9
Be +2 45
Ca +2 59.5
Cd +2 54
Ce +3 70
Co +2 53
Co(NH3)6 +3 100
Co(ethylenediamine)3 +3 74.7
Cr +3 67
Cs +1 77.3
Cu +2 56.6
D +1 213.7
Dy +3 65.7
Er +3 66
Eu +3 67.9
FeII +2 53.5
FeIII +3 69
Gd +3 67.4
H +1 350.1
Hg2 +2 68.7
Hg +2 63.6
Ho +3 66.3
K +1 73.5
La +3 69.6
Li +1 38.69
Mg +2 53.06
Mn +2 53.5
NH 4 73.7
N2H5 +1 59
Na +1 50.11
Nd +3 69.6
Ni +2 50
Pb +2 71
Pr +3 69.6
Ra +2 66.8
Rb +1 77.8
Sc +3 64.7
Sm +3 68.5
Sr +2 59.46
Tl +1 74.9
Tm +3 65.5
UO2 +2 32
Y +3 62
Yb +3 65.2
Zn +2 52.8
Inorganic Anions Charge Conductivity (E-4)
Au(CN)2 -1 50
Au(CN)4 -1 36
B(C6H5)4 -1 21
Br -1 78.1
Br3 -1 43
BrO3 -1 55.7
Cl -1 76.31
ClO2 -1 52
ClO3 -1 64.6
ClO4 -1 67.3
CN -1 78
CO3 -2 69.3
Co(CN)6 -3 98.9
CrO4 -2 85
F -1 55.4
Fe(CN)6 IIII -4 110.4
Fe(CN)6 III -3 100.9
H2AsO4 -1 34
HCO3 -1 44.5
HF2 -1 75
HPO4 -2 33
H2PO4 -1 33
HS -1 65
HSO3 -1 50
HSO4 -1 50
H2SbO4 -1 31
I -1 76.9
IO3 -1 40.5
IO4 -1 54.5
MnO4 -1 61.3
MoO4 -2 74.5
N3 -1 69.5
N(CN)2 -1 54.5
NO2 -1 71.8
NO3 -1 71.42
NH2SO3 (sulfamate) -1 48.6
OCN (cyanate) -1 64.6
OH -1 198
PF6 -1 56.9
PO3F -2 63.3
PO4 -3 69
P2O7 -4 96
P3O9 -3 83.6
P3O10 -5 109
ReO4 -1 54.9
SCN (thiocyanate) -1 66.5
SeCN -1 64.7
SeO4 -2 75.7
SO3 -2 79.9
SO4 -2 80
S2O3 -2 85
S2O4 -2 66.5
S2O6 -2 93
S2O8 -2 86
WO4 -2 69.4
Organic Cations Charge Conductivity (E-4)
Decylpyridinium +1 29.5
Diethylammonium +1 42
Dimethylammonium +1 51.5
Dipropylammonium +1 30.1
Dodecylammonium +1 23.8
Ethylammonium +1 47.2
Ethyltrimethylammonium +1 40.5
Isobutylammonium +1 38
Methylammonium +1 58.3
Piperidinium +1 37.2
Propylammonium +1 40.8
Tetrabutylammonium +1 19.5
Tetraethylammonium +1 32.6
Tetramethylammonium +1 44.9
Tetrapropylammonium +1 23.5
Triethylsulfonium +1 36.1
Trimethylammonium +1 47.2
Trimethylsulfonium +1 51.4
Tripropylammonium +1 26.1
Organic Anions Charge Conductivity (E-4)
Acetate -1 41
Benzoate -1 32.4
Bromoacetate -1 39.2
Bromobenzoate -1 30
Butanoate -1 32.6
Chloroacetate -1 42.2
m-Chlorobenzoate -1 31
o-Chlorobenzoate -1 30.5
Citrate -3 70.2
Crotonate -1 33.2
Cyanoacetate -1 43.4
Cyclohexanecarboxylate -1 28.7
Cyclopropane-1,3-dicarboxylate2 -1 53.4
Decylsulfonate -1 26
Dichloroacetate -1 38.3
Diethylbarbiturate -2 26.3
Dihydrogencitrate -1 30
Dimethylmalonate -2 49.4
3, 5-Dinitrobenzoate -1 28.3
Dodecylsulfonate -1 24
Ethylmalonate -1 49.3
Ethylsulfonate -1 39.6
Fluoroacetate -1 44.4
Fluorobenzoate -1 33
Formate -1 54.6
Fumarate -2 61.8
Glutarate -2 52.6
Hydrogenoxalate -1 40.2
Iodoacetate -1 40.6
Lactate -1 38.8
Malate -2 58.8
Malonate -1 63.5
3-Methylbutanoate -1 32.7
Methylsulfonate -1 48.8
Naphthylacetate -1 28.4
1, 8-Octanedioate -2 36
Octylsulfonate -1 29
Oxalate -2 74.11
Phenylacetate -1 30.6
m-Phthalate -2 54.7
o-Phthalate -2 52.3
Picrate -1 30.37
Propanoate -1 35.8
Propylsulfonate -1 37.1
Salicylate -1 36
Succinate -2 58.8
Tartrate -2 59.6
Trichloroacetate -1 36.6
Trimethylacetate -1 31.9

UNSW Medicine

https://medicalsciences.med.unsw.edu.au/research/research-services/ies/ionicmobilitytables

Ion Table 1 Charge Conductivity (E-4)
Choline +1 0.51*K
Cs +1 1.05*K
K +1 1*K
Li +1 0.526*K
NH4 (Ammonium) +1 1.001*K
Na +1 0.682*K
Rb +1 1.059*K
TEA (TetraethylAmmonium) +1 0.444*K
TMA (TetramethylAmmonium) +1 0.611*K
Acetate -1 0.556*K
Benzoate -1 0.441*K
Br -1 1.063*K
Cl -1 1.0382*K
ClO4 (Perchlorate) -1 0.916*K
F -1 0.753*K
H2PO -1 0.45*K
HCO3 -1 0.605*K
I -1 1.0456*K
NO3 (Nitrate) -1 0.972*K
Picrate -1 0.411*K
Propionate -1 0.487*K
SCN (Thiocyanate) -1 0.901*K
Co +2 0.367*K
Mg +2 0.361*K
HPO4 -2 0.39*K
SO4 -2 0.544*K
Ion Table 2 Charge Conductivity (E-4)
NMDG +1 0.33*K
Tris +1 0.4*K
Aspartate -1 0.3*K
Gluconate -1 0.33*K
Glutamate -1 0.26*K
HEPES -1 0.3*K
Isethionate -1 0.52*K
MES -1 0.37*K
MOPS -1 0.35*K
EGTA(2-) -2 0.24*K
EGTA(3-) -3 0.25*K
Ion Table 3 Charge Conductivity (E-4)
Thallium +1 1.02*K
Butyrate -1 0.44*K
Citrate -3 0.318*K
2-(Methyl-Amino) Ethanol +1 0.49*K
N-Methylethanolamine +1 0.49*K
Ion Table 4 Charge Conductivity (E-4)
Ag +1 0.842*K
Diethylammonium +1 0.57*K
Dimethylammonium +1 0.705*K
Ethyltrimethylammonium +1 0.551*K
H +1 4.757*K
Piperidinium +1 0.506*K
Tetrabutylammonium +1 0.265*K
Tetrapropylammonium +1 0.318*K
Triethylammonium +1 0.467*K
Trimethylammonium +1 0.643*K
Bromoacetate -1 0.533*K
Bromobenzoate -1 0.41*K
Chloroacetate -1 0.541*K
CNO (Cyanate) -1 0.879*K
Cyanoacetate -1 0.59*K
Dichloroacetate -1 0.521*K
Ethylsulfate -1 0.539*K
Ethylsulfonate -1 0.539*K
Fluoroacetate -1 0.604*K
Fluorobenzoate -1 0.45*K
Formate -1 0.743*K
Iodoacetate -1 0.552*K
Lactate -1 0.528*K
Methylsulfate -1 0.664*K
methanesulfonate -1 0.664*K
Methylsulfonate -1 0.664*K
OH (hydroxide) -1 2.69*K
ReO4 (Rhenate) -1 0.747*K
Salicylate -1 0.49*K
Trichloroacetate -1 0.476*K
Cd +2 0.37*K
Cu +2 0.365*K
Fe +2 0.37*K
Hg +2 0.433*K
Mn +2 0.364*K
Ni +2 0.337*K
Pb +2 0.48*K
Malate -2 0.4*K
Maleate -2 0.421*K
Oxalate -2 0.504*K
Succinate -2 0.4*K
Gd +3 0.305*K
Fe +3 0.308*K
La +3 0.316*K
Citrate -3 0.318*K
ATP (Adenosine 5'-Triphosphate) -2 0.15*K
ATP (Adenosine 5'-Triphosphate) -3 0.15*K
ATP (Adenosine 5'-Triphosphate) -4 0.15*K
Ion Table 5 Charge Conductivity (E-4)
2-AP (2-aminopyridine) +1 0.45*K
3-AP (3-aminopyridine) +1 0.46*K
4-AP (4-aminopyridine) +2 0.29*K

Ions likely irrelevant to LJP calculations

These ions are very unlikely to affect the calculated LJP due to exceptionally low mobility, no charge, or common use at extremely low concentrations (see the theory page for details).

By listing such molecules here we confirm we know they exist, and remind users they are probably not important for caculating LJP.

Irrelevant Ion Charge Conductivity (E-4)
GTP +1 0
Glucose 0 0
Sucrose 0 0
Dextrose 0 0
Source Code
Last edited on January 6th, 2021
---
title: LJPcalc - Table of Ion Mobilities
description: Mobilities and conductances for many ions with references
---

# LJPcalc Ion Charge and Conductivity Library

### Notes
* This document provides a table supplying [elementary charge](https://en.wikipedia.org/wiki/Elementary_charge) and [molar conductivity](https://en.wikipedia.org/wiki/Molar_conductivity) for common ions.
* All conductivities on this page assume ambient temperature (~25C).
* Conductivities normalized to K (73.5) are suffixed with "*K".
* Ions higher in the list are used by LJPcalc when duplicates are present.
* Uncharged molecules (like glucose) don't conduct electricity in solution and therefore do not influence LJP
* Large charged molecules (like EGTA and phosphocreatine) have low mobilities so their influence on LJP is negligible when solutions contain appreciable concentrations of small ions. Therefore, large molecules can be omitted from LJP calculations for most biological applications.

### **Langes Handbook of Chemistry**
Fifteenth Edition, Table 8.32, page 997\
http://fptl.ru/biblioteka/spravo4niki/dean.pdf

Inorganic Cations|Charge|Conductivity (E-4)
---|---|---
Ag|+1|61.9
Al|+3|61
Ba|+2|63.9
Be|+2|45
Ca|+2|59.5
Cd|+2|54
Ce|+3|70
Co|+2|53
Co(NH3)6|+3|100
Co(ethylenediamine)3|+3|74.7
Cr|+3|67
Cs|+1|77.3
Cu|+2|56.6
D|+1|213.7
Dy|+3|65.7
Er|+3|66
Eu|+3|67.9
FeII|+2|53.5
FeIII|+3|69
Gd|+3|67.4
H|+1|350.1
Hg2|+2|68.7
Hg|+2|63.6
Ho|+3|66.3
K|+1|73.5
La|+3|69.6
Li|+1|38.69
Mg|+2|53.06
Mn|+2|53.5
NH|4|73.7
N2H5|+1|59
Na|+1|50.11
Nd|+3|69.6
Ni|+2|50
Pb|+2|71
Pr|+3|69.6
Ra|+2|66.8
Rb|+1|77.8
Sc|+3|64.7
Sm|+3|68.5
Sr|+2|59.46
Tl|+1|74.9
Tm|+3|65.5
UO2|+2|32
Y|+3|62
Yb|+3|65.2
Zn|+2|52.8

Inorganic Anions|Charge|Conductivity (E-4)
---|---|---
Au(CN)2|-1|50
Au(CN)4|-1|36
B(C6H5)4|-1|21
Br|-1|78.1
Br3|-1|43
BrO3|-1|55.7
Cl|-1|76.31
ClO2|-1|52
ClO3|-1|64.6
ClO4|-1|67.3
CN|-1|78
CO3|-2|69.3
Co(CN)6|-3|98.9
CrO4|-2|85
F|-1|55.4
Fe(CN)6 IIII|-4|110.4
Fe(CN)6 III|-3|100.9
H2AsO4|-1|34
HCO3|-1|44.5
HF2|-1|75
HPO4|-2|33
H2PO4|-1|33
HS|-1|65
HSO3|-1|50
HSO4|-1|50
H2SbO4|-1|31
I|-1|76.9
IO3|-1|40.5
IO4|-1|54.5
MnO4|-1|61.3
MoO4|-2|74.5
N3|-1|69.5
N(CN)2|-1|54.5
NO2|-1|71.8
NO3|-1|71.42
NH2SO3 (sulfamate)|-1|48.6
OCN (cyanate)|-1|64.6
OH|-1|198
PF6|-1|56.9
PO3F|-2|63.3
PO4|-3|69
P2O7|-4|96
P3O9|-3|83.6
P3O10|-5|109
ReO4|-1|54.9
SCN (thiocyanate)|-1|66.5
SeCN|-1|64.7
SeO4|-2|75.7
SO3|-2|79.9
SO4|-2|80
S2O3|-2|85
S2O4|-2|66.5
S2O6|-2|93
S2O8|-2|86
WO4|-2|69.4

Organic Cations|Charge|Conductivity (E-4)
---|---|---
Decylpyridinium|+1|29.5
Diethylammonium|+1|42
Dimethylammonium|+1|51.5
Dipropylammonium|+1|30.1
Dodecylammonium|+1|23.8
Ethylammonium|+1|47.2
Ethyltrimethylammonium|+1|40.5
Isobutylammonium|+1|38
Methylammonium|+1|58.3
Piperidinium|+1|37.2
Propylammonium|+1|40.8
Tetrabutylammonium|+1|19.5
Tetraethylammonium|+1|32.6
Tetramethylammonium|+1|44.9
Tetrapropylammonium|+1|23.5
Triethylsulfonium|+1|36.1
Trimethylammonium|+1|47.2
Trimethylsulfonium|+1|51.4
Tripropylammonium|+1|26.1

Organic Anions|Charge|Conductivity (E-4)
---|---|---
Acetate|-1|41
Benzoate|-1|32.4
Bromoacetate|-1|39.2
Bromobenzoate|-1|30
Butanoate|-1|32.6
Chloroacetate|-1|42.2
m-Chlorobenzoate|-1|31
o-Chlorobenzoate|-1|30.5
Citrate|-3|70.2
Crotonate|-1|33.2
Cyanoacetate|-1|43.4
Cyclohexanecarboxylate|-1|28.7
Cyclopropane-1,3-dicarboxylate2|-1|53.4
Decylsulfonate|-1|26
Dichloroacetate|-1|38.3
Diethylbarbiturate|-2|26.3
Dihydrogencitrate|-1|30
Dimethylmalonate|-2|49.4
3, 5-Dinitrobenzoate|-1|28.3
Dodecylsulfonate|-1|24
Ethylmalonate|-1|49.3
Ethylsulfonate|-1|39.6
Fluoroacetate|-1|44.4
Fluorobenzoate|-1|33
Formate|-1|54.6
Fumarate|-2|61.8
Glutarate|-2|52.6
Hydrogenoxalate|-1|40.2
Iodoacetate|-1|40.6
Lactate|-1|38.8
Malate|-2|58.8
Malonate|-1|63.5
3-Methylbutanoate|-1|32.7
Methylsulfonate|-1|48.8
Naphthylacetate|-1|28.4
1, 8-Octanedioate|-2|36
Octylsulfonate|-1|29
Oxalate|-2|74.11
Phenylacetate|-1|30.6
m-Phthalate|-2|54.7
o-Phthalate|-2|52.3
Picrate|-1|30.37
Propanoate|-1|35.8
Propylsulfonate|-1|37.1
Salicylate|-1|36
Succinate|-2|58.8
Tartrate|-2|59.6
Trichloroacetate|-1|36.6
Trimethylacetate|-1|31.9

### UNSW Medicine
https://medicalsciences.med.unsw.edu.au/research/research-services/ies/ionicmobilitytables

Ion Table 1|Charge|Conductivity (E-4)
---|---|---
Choline|+1|0.51*K
Cs|+1|1.05*K
K|+1|1*K
Li|+1|0.526*K
NH4 (Ammonium)|+1|1.001*K
Na|+1|0.682*K
Rb|+1|1.059*K
TEA (TetraethylAmmonium)|+1|0.444*K
TMA (TetramethylAmmonium)|+1|0.611*K
Acetate|-1|0.556*K
Benzoate|-1|0.441*K
Br|-1|1.063*K
Cl|-1|1.0382*K
ClO4 (Perchlorate)|-1|0.916*K
F|-1|0.753*K
H2PO|-1|0.45*K
HCO3|-1|0.605*K
I|-1|1.0456*K
NO3 (Nitrate)|-1|0.972*K
Picrate|-1|0.411*K
Propionate|-1|0.487*K
SCN (Thiocyanate)|-1|0.901*K
Co|+2|0.367*K
Mg|+2|0.361*K
HPO4|-2|0.39*K
SO4|-2|0.544*K

Ion Table 2|Charge|Conductivity (E-4)
---|---|---
NMDG|+1|0.33*K
Tris|+1|0.4*K
Aspartate|-1|0.3*K
Gluconate|-1|0.33*K
Glutamate|-1|0.26*K
HEPES|-1|0.3*K
Isethionate|-1|0.52*K
MES|-1|0.37*K
MOPS|-1|0.35*K
EGTA(2-)|-2|0.24*K
EGTA(3-)|-3|0.25*K

Ion Table 3|Charge|Conductivity (E-4)
---|---|---
Thallium|+1|1.02*K
Butyrate|-1|0.44*K
Citrate|-3|0.318*K
2-(Methyl-Amino) Ethanol|+1|0.49*K
N-Methylethanolamine|+1|0.49*K

Ion Table 4|Charge|Conductivity (E-4)
---|---|---
Ag|+1|0.842*K
Diethylammonium|+1|0.57*K
Dimethylammonium|+1|0.705*K
Ethyltrimethylammonium|+1|0.551*K
H|+1|4.757*K
Piperidinium|+1|0.506*K
Tetrabutylammonium|+1|0.265*K
Tetrapropylammonium|+1|0.318*K
Triethylammonium|+1|0.467*K
Trimethylammonium|+1|0.643*K
Bromoacetate|-1|0.533*K
Bromobenzoate|-1|0.41*K
Chloroacetate|-1|0.541*K
CNO (Cyanate)|-1|0.879*K
Cyanoacetate|-1|0.59*K
Dichloroacetate|-1|0.521*K
Ethylsulfate|-1|0.539*K
Ethylsulfonate|-1|0.539*K
Fluoroacetate|-1|0.604*K
Fluorobenzoate|-1|0.45*K
Formate|-1|0.743*K
Iodoacetate|-1|0.552*K
Lactate|-1|0.528*K
Methylsulfate|-1|0.664*K
methanesulfonate|-1|0.664*K
Methylsulfonate|-1|0.664*K
OH (hydroxide)|-1|2.69*K
ReO4 (Rhenate)|-1|0.747*K
Salicylate|-1|0.49*K
Trichloroacetate|-1|0.476*K
Cd|+2|0.37*K
Cu|+2|0.365*K
Fe|+2|0.37*K
Hg|+2|0.433*K
Mn|+2|0.364*K
Ni|+2|0.337*K
Pb|+2|0.48*K
Malate|-2|0.4*K
Maleate|-2|0.421*K
Oxalate|-2|0.504*K
Succinate|-2|0.4*K
Gd|+3|0.305*K
Fe|+3|0.308*K
La|+3|0.316*K
Citrate|-3|0.318*K
ATP (Adenosine 5'-Triphosphate)|-2|0.15*K
ATP (Adenosine 5'-Triphosphate)|-3|0.15*K
ATP (Adenosine 5'-Triphosphate)|-4|0.15*K

Ion Table 5|Charge|Conductivity (E-4)
---|---|---
2-AP (2-aminopyridine)|+1|0.45*K
3-AP (3-aminopyridine)|+1|0.46*K
4-AP (4-aminopyridine)|+2|0.29*K

### **Ions likely irrelevant to LJP calculations**
These ions are very unlikely to affect the calculated LJP
due to exceptionally low mobility, no charge, or common
use at extremely low concentrations (see the theory page
for details).

By listing such molecules here we confirm we know they exist,
and remind users they are probably not important for caculating LJP.

Irrelevant Ion|Charge|Conductivity (E-4)
---|---|---
GTP|+1|0
Glucose|0|0
Sucrose|0|0
Dextrose|0|0