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 Dortmund Data Bank
Thermophysical Data for Process Design
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DDB# Name CAS-RN Formula
174 Water 7732-18-5 H2O Overview Details
2245 Phosphoric acid 7664-38-2 H3O4P Overview Details
4128 Potassium hydroxide 1310-58-3 HKO Overview Details
18148 Dipotassium dihydrogen pyrophosphate H2K2O7P2 Overview Details
1001697 Potassium pyrophosphate trihydrate K4P2O7*3H2O Overview Details
1006845 Tripotassium pentahydrogen dipyrophosphate K3H5(P2O7)2 Overview Details
1006846 Potassium hydrogen pyrophosphate trihydrate K3HP2O7*3H2O Overview Details
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Mixture Data

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Vapor-Liquid Equilibria (VLE)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 29 3 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Heat Capacities of Mixtures, Excess Heat Capacities (CPE)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 21 56 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Solid-Liquid Equilibria (SLE)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 11 3 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Vapor-Liquid Equilibria of Electrolyte Systems (ELE)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 15 43 1 n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Densities and Volumes of Mixtures, Excess Volumes (VE)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 42 119 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Salt Solubilities (ESLE)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 2 13 2 n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Critical Data of Mixtures (CRI)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 1 n.a. n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Mixture Viscosities (VIS)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 40 33 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Mixture Surface Tensions (MSFT)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 3 8 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Mixture Speeds of Sound (MSOS)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 12 9 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Mixture Thermal Conductivities (MTCN)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 13 9 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Mixture Dielectric Constants (MDEC)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 2 20 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Mixture P-v-T Data (MPVT)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water n.a. 1 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Electrical Conductivities (ECND)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 27 32 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Diffusion Coefficients (DIF)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 3 3 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Further Thermodynamic Properties (X)
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 21 23 n.a. n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Total
DDB# Name 2245 4128 18148 1001697 1006845 1006846 Potassium hydrogen pyrophosphate trihydrate
174 Water 242 375 3 n.a. n.a. n.a.
2245 Phosphoric acid n.a. n.a. n.a. n.a. n.a.
4128 Potassium hydroxide n.a. n.a. n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a. n.a. n.a.
1001697 Potassium pyrophosphate trihydrate n.a. n.a.
1006845 Tripotassium pentahydrogen dipyrophosphate n.a.

Dortmund Data Bank Version: February 2024
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