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Section: 6 | Critical Constants of Inorganic Compounds |
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The recommended form of citation is:
John R. Rumble, ed., CRC Handbook of Chemistry and Physics, 103rd Edition (Internet Version 2022), CRC Press/Taylor & Francis, Boca Raton, FL.
If a specific table is cited, use the format: "Physical Constants of Organic Compounds," in CRC Handbook of Chemistry and Physics, 103rd Edition (Internet Version 2022), John R. Rumble, ed., CRC Press/Taylor & Francis, Boca Raton, FL.

CRITICAL CONSTANTS OF INORGANIC COMPOUNDS

The parameters of the liquid-gas critical point are important constants in determining the behavior of fluids. This table lists the critical temperature, pressure, and molar volume, as well as the normal boiling point, for over 140 inorganic compounds. Column definitions for the table are as follows.

Column heading Definition
Name Name of inorganic compound; compounds are listed alphabetically by name
Mol. form. Molecular formula of compound
Tbp Normal boiling point, in K, at a pressure of 101.325 kPa (1 atmosphere); an “sp” following the value indicates a sublimation point (temperature at which the solid is in equilibrium with the gas at a pressure of 101.325 kPa)
Tc Critical temperature, in K
Pc Critical pressure, in MPa
Vc Critical molar volume, in cm3 mol–1
Ref. Reference number

The number of digits given for Tb, Tc, and Pc indicates the estimated accuracy of these quantities; however, values of Tc greater than 750 K may be in error by 10 K or more. Although most Vc values are given to three figures, they cannot be assumed accurate to better than a few percent.

All values are experimentally determined except for a few values, indicated by an asterisk*, that are based on extrapolations. Methods of measurement are described and critiqued in Ref. 1. 

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Critical Constants of Inorganic Compounds



NameSynonymMol. form.CAS Reg. No.Mol. Wt.Tbp/KTc/KPc/MPaVc/cm3 mol-1Ref.
Continued on next page...
AluminumAl7429-90-526.98227926700 *2
Aluminum bromideAluminum tribromideAlBr37727-15-3266.6945287632.893103
Aluminum chlorideAluminum trichlorideAlCl37446-70-0133.341453 sp6202.632573
Aluminum iodideAluminum triiodideAlI37784-23-8407.6956559834083
AmmoniaR-717NH37664-41-717.031239.83405.5611.35869.83,4
Ammonium chlorideSal ammoniacNH4Cl12125-02-953.492611 sp1155163.53
Antimony(III) bromideAntimony tribromideSbBr37789-61-9361.4725619043003
Antimony(III) chlorideAntimony trichlorideSbCl310025-91-9228.119493.57942723
Antimony(III) iodideAntimony triiodideSbI37790-44-5502.47367311023
ArgonAr7440-37-139.94887.302150.6874.863753
Arsenic (gray)α-ArsenicAs7440-38-274.922889 sp167322.3353
Arsenic(III) chlorideArsenic trichlorideAsCl37784-34-1181.2814036542523
ArsineArsenic hydrideAsH37784-42-177.946210.7373.13
BerylliumGluciniumBe7440-41-79.01227415205 *5
BismuthBi7440-69-9208.98018374620 *5
Bismuth tribromideTribromobismuthineBiBr37787-58-8448.69273512203013
Bismuth trichlorideTrichlorobismuthineBiCl37787-60-2315.339714117912.02613
Boron tribromideTribromoboraneBBr310294-33-4250.523364.55812723
Boron trichlorideTrichloroboraneBCl310294-34-5117.170285.74553.872393

  • *Extrapolated.


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