IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: 1-Octanol with Hexane (n-hexane) and Water
Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 1-Octanol (octyl alcohol, capryl alcohol); C8H18O; [111-87-5]  NIST Chemistry WebBook for detail
   (3) Hexane (n-hexane); C6H14; [110-54-3]  NIST Chemistry WebBook for detail
Evaluator:
   A. Skrzecz, Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland (1996.04)

 Critical Evaluation:
      A survey of reported compositions along the saturation curve (sat), and compositions of coexisting phases in equilibrium (eq.) for the system 1-octanol-hexane-water is given in Table 84.

Saturation curve
   The system 1-octanol-hexane-water forms a large miscibility gap of type 2 covering the majority of the concentration triangle. Compositions along the saturation curves were not reported independently in the references; the saturation curves can be constructed on the basis of equilibrium compositions of phases. Two binary systems, hexane-water and 1-octanol-water, form miscibility gaps. The data for these systems were compiled and critically evaluated in previously published SDS volumes, Refs. 3 and 4, respectively. The recommended values of mutual solubility of the hexane-water system3 at 293 K are x'2=0.99946 and x"2=2.5·10–6. The recommended values of mutual solubility of 1-octanol-water system4 at 298 K are: x'1=0.742 and x"1=7.5·10–5. Experimental solubilities of binary systems presented in Ref. 1 at 293.2 K are x'1=0.99970, x"2=7.1·10–6 and x'1=0.742, x"1=5.81·10–5, respectively.

Phases in equilibrium
   Compositions of coexisting phases in equilibrium for the ternary system 1-octanol-hexane-water were reported in both references. The experimental procedure was reported very briefly in Ref. 1 and not at all in Ref. 2. All compositions of phases in equilibrium reported in Refs. 1 and 2 at various temperatures are consistent one with another. All presented data are treated as tentative. To present system behavior, experimental compositions of coexisting phases in equilibrium at 293.2 K1 are presented in Fig. 46 .

 Experimental Data:   (Notes on the Nomenclature)
TABLE 84. Summary of experimental data for the system 1-octanol-hexane-water
AuthorT/KDataTypeReference
Kiryukhin et al., 1981293, 313eq. (21)1
Kiryukhin et al., 1983335-373eq. (12)2
 View Figure 1 for this Evaluation

Notes:
Table 84  Number of experimental points in parentheses.

 References: (Click a link to see its experimental data associated with the reference)
   1  Kiryukhin, A.M.; Lesteva, T.M.; Markuzin, N.P., Prom-st Sint. Kauch. 12, 12 (1981).
   2  Kiryukhin, A.M.; Lesteva, T.M.; Markuzin, N.P., Prom-st Sint. Kauch. 12, 3 (1983).
   3  Shaw, D.G., ed., Solubility Data Series, Vol. 37, Hydrocarbons with Water and Seawater, Part I: Hydrocarbons C5 to C7 (Pergamon, New York, 1989).
   4  Barton, A.F. M., ed., Solubility Data Series, Vol. 15, Alcohols with Water (Pergamon, New York 1984).