IUPAC-NIST Solubility Database
NIST Standard Reference Database 106


Glass Ball as Bullet Solubility System: Nitroethane with Hexane

Components:
   (1) Hexane; C6H14; [110-54-3]  NIST Chemistry WebBook for detail
   (2) Nitroethane; C2H5NO2; [79-24-3]  NIST Chemistry WebBook for detail

Evaluator:
   V P. Sazonov, Technical University, Samara, Russia, May, 2000.

Critical Evaluation:

           Quantitative solubility data for the system nitroethane + hexane were reported in the publications listed in Table 1.

        All original data are given in the data sheets immediately following this Critical Evaluation. The following individual points in otherwise satisfactory studies are in marked disagreement with other studies and have been rejected: in the nitroethane-rich phase at 298 K (Snyder and Eckert3), 301.5 and 302.4 K.1    Table 2 and Table 3 has been prepared on the basis of all other reported data.
        Values obtained by the evaluator by graphical interpolation or extrapolation from the data sheets are presented in the Table 2 and Table 3. Data are"recommended" if two or more apparently reliable studies are in reasonable (± 5 % relative) agreement. All other data are regarded as tentative only.

        The upper critical solution temperature has been reported as 300.575 K,6   302.5 K,1  304.1 K,5  304.5 K,3  and 305.7 K.2    Thus, the tentative value is: Tc = (303.5 ± 2) K. The corresponding critical solution composition has been reported as xcl = 0.500 (Beridze and Karshibaev5) and xcl = 0.560.6  Thus, the tentative value is: xcl = 0.53 ± 0.03.
        The recommended and tentative values for the mutual solubility reported in the above table were approximated by an equation based on the scaling law (described in the preface to this volume) for which the following parameters were derived: a1 = 0.82346, a2 = 0.31876, b1 = 4.24293, b2 = -3.51701    (mean standard error of estimate was 0.0359).
        For this approximation, the tentative values of UCST and xcl have been used. This relationship is presented in Fig. 5 together with experimental data reported in four references.1-3,6

Experimental Data:   (Notes on the Nomenclature)

Table 1. Summary of solubility data for the system nitroethane + hexane
AuthorT/KReferenceSolubilityMethod
Hwa et al.276 to 3021mutualanalytical/synthetic
Clever et al.289 to 3062mutualsynthetic
Snyder and Eckert et al.301 to 3053mutualsynthetic
Hsu and Clever2984mutualnot stated
Beridze and Karshibaev3045UCSTnot stated
Ziolo et al.289 to 3016mutualnot stated
Table 2. Recommended and Tentative values for the mutual solubilities of nitroethane (1) and hexane (2)
T/K102 * Mass Fraction w1w1 NoteMole Fraction x1x1 NoteComment(s)
278.2 8.8tentative0.100tentativehexane-rich phase
283.210.8tentative0.123tentativehexane-rich phase
288.213.6tentative0.153tentativehexane-rich phase
293.218.2tentative0.203tentativehexane-rich phase
298.223.9recommended0.265recommendedhexane-rich phase
301.228.6recommended0.315tentativehexane-rich phase
303.230.4recommended0.334tentativehexane-rich phase
304.234.2recommended0.374tentativehexane-rich phase
Table 3. Recommended and tentative values for the mutual solubilities of nitroethane (1) and hexane (2)
T/K102 * Mass Fraction w2w2 NoteMole Fraction x2x2 NoteComment(s)
278.211.0tentative0.097tentativenitroethane-rich phase
283.213.8tentative0.116tentativenitroethane-rich phase
288.218.8recommended0.168recommendednitroethane-rich phase
293.222.0recommended0.197recommendednitroethane-rich phase
298.227.4recommended0.247recommendednitroethane-rich phase
301.231.0recommended0.281recommendednitroethane-rich phase
303.235.0recommended0.319recommendednitroethane-rich phase
304.238.2recommended0.350recommendednitroethane-rich phase
View Figure 1 for this Evaluation

References: (Click a link to see its experimental data associated with the reference)

   1  Hwa, S.C.P.; Techo, R.; Ziegler, W.T., J. Chem. Eng. Data 8, 409-11 (1963).
   2  Clever, H.L.; Pirkle, Q.R. Jr.; Allen, B.J. Jr.; Derrick, M.E., J. Chem. Eng. Data 17, 31-4 (1972).
   3  Snyder, R.B.; Eckert, C.A., J. Chem. Eng. Data 18, 282-5 (1973).
   4  Hsu, K.Y.; Clever, H.L., J. Chem. Eng. Data 20, 268-71 (1975).
   5  Beridze, D.K.; Karshibaev, A.K., Fizika i fiziko-khimiaj zhidkostei. Moskva 3, 138-51 (1976).
   6  Ziolo, J.; Ziejewska, Z.; Piotrowska, J., J. Phys. Chem. 84, 979-80 (1980).