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 Dortmund Data Bank
Thermophysical Data for Process Design
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Query
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DDB# Name CAS-RN Formula
174 Water 7732-18-5 H2O Overview Details
2421 Phosphorus pentoxide 1314-56-3 O5P2 Overview Details
6357 Sodium dihydrogen phosphate 7558-80-7 H2NaO4P Overview Details
18148 Dipotassium dihydrogen pyrophosphate H2K2O7P2 Overview Details
18149 Disodium dihydrogen pyrophosphate 7758-16-9 H2Na2O7P2 Overview Details
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Mixture Data

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Vapor-Liquid Equilibria (VLE)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water 13 n.a. n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Liquid-Liquid Equilibria (Miscibility Gaps) (LLE)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water n.a. 2 n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Heat Capacities of Mixtures, Excess Heat Capacities (CPE)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water 4 1 n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

(A)zeotropic Data (AZD)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water 9 n.a. n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Solid-Liquid Equilibria (SLE)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water 7 1 n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Vapor-Liquid Equilibria of Electrolyte Systems (ELE)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water n.a. 24 1 n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Densities and Volumes of Mixtures, Excess Volumes (VE)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water 15 16 n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Salt Solubilities (ESLE)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water n.a. 2 2 n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Mixture Viscosities (VIS)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water 14 18 n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Mixture Surface Tensions (MSFT)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water n.a. 3 n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Mixture Speeds of Sound (MSOS)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water n.a. 13 n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Electrical Conductivities (ECND)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water n.a. 18 n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Further Thermodynamic Properties (X)
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water 1 2 n.a. n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Total
DDB# Name 2421 6357 18148 18149 Disodium dihydrogen pyrophosphate
174 Water 63 100 3 n.a.
2421 Phosphorus pentoxide n.a. n.a. n.a.
6357 Sodium dihydrogen phosphate n.a. n.a.
18148 Dipotassium dihydrogen pyrophosphate n.a.

Dortmund Data Bank Version: February 2024
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