IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Hexadecane with Water

Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Hexadecane; C16H34; [544-76-3]  NIST Chemistry WebBook for detail

Evaluator:
   G.T. Hefter, School of Mathematical and Physical Sciences, Murdoch University, Perth, W.A., Australia. June 1986.

Critical Evaluation:

   Quantitative solubility data for the hexadecane (1) – water (2) system have been reported in the publications listed in Table 1.

The original data in all of these publications are compiled in the Data Sheets immediately following this Critical Evaluation. For convenience further discussion of this system will be divided into two parts.

1. THE SOLUBILITY OF HEXADECANE (1) IN WATER (2)

All data on the solubility of hexadecane in water have probably been obtained at 298 K (Table 1, although Yeshiva and Yamane (ref 4) did not specify their temperature). However the values are in poor agreement and no “best” value has been calculated. It may also be noted that all values are higher than the value of ~2 x 10^-9 g(1)/100 g s1n predicted by extrapolation of lower hydrocarbon solubilities (although whether this extrapolation remains valid for very long chain hydrocarbons is not known).

2. THE SOLUBILITY OF WATER (2) IN HEXADECANE (1)

The solubility of water in hexadecane at atmospheric pressure has been reported by Schatzberg (ref 1) and Englin et al. (ref 2) over a range of temperatures. However, agreement is poor (Table 3) and the data must be considered as very Tentative.

At higher pressures the solubility of water in hexadecane has been reported over the range 523-598 K and 1.7-78.5 MPa by Skripka et al. (ref 5, 7, 8). As these are the only data available under these conditions no Critical Evaluation is possible. The interested user is referred to the relevant Data Sheet for the experimental values.

Experimental Data:   (Notes on the Nomenclature)

Table 1. Quantitative Solubility Studies of Hexadecane (1) - Water (2) System
Author	T/K	T/KNote	Reference	Solubility	Method
Schatzberg	298, 313	-	1	(2) in (1)	Karl Fischer
Englin et al.	293-323	-	2	(2) in (1)	analytical
Franks	298	-	3	(1) in (2)	GLC
Yoshida and Yamane	-	a	4	(1) in (2)	GLC
Skripka and Namiot	598	b	5	(2) in (1)	-^a
Sutton and Calder	298	-	6	(1) in (2)	GLC
Skripka and Sultanov	523-598	b	7, 8	(2) in (1)	-^a

Table 2. Reported Solubility Values of Hexadecane (1) in Water (2)
T/K	Reference	Sol. Power	Solubility	Sol. Note
298	3, 4, 6	7	6.3, 5.57^b, 0.9 g(1)/100g sln	a

Table 3. Tentative Solubility Values of Water (2) in Hexadecane (1)
T/K	Reference	Sol. Power	Solubility	Best Sol. Power	Best Solubility	Best Sol. Note	x₂ Power	x₂	x₂ Note
293	2	3	6.9 g(1)/100g sln	3	7 g(1)/100g sln	b	3	0.9	b
298	1, 2	3	5.4, 9.6^a g(2)/100g sln	3	8 ± 2 g(2)/100g sln	b	3	1.0	b
303	2	3	12.3 g(1)/100g sln	3	12 g(1)/100g sln	b	3	1.5	b
313	1, 2	3	10.4, 20.9 g(1)/100g sln	3	16 ± 5 g(1)/100g sln	b	3	2.0	b
323	-	3	33.2 g(2)/100g sln	3	33 g(2)/100g sln	b	3	4.2	b

Notes:
Table 2^a  No "best" value calculated due to uncertainties in data, see text.
Table 2^b  Temperature not specified.
Table 3^a  Obtained by the Evaluator by grpahical interpolation of the authors' data.
Table 3^b  Obtained by averaging where appropriate; σ_n has no statistical significance.

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

   1  Schatzberg, P., J. Phys. Chem. 1963, 67, 776-9.
   2  Englin, B.A.; Plate, A.F.; Tugolukov, V.M. Pryanishnikova, M.A., Khim. Tekhnol. Topl. Masel 1965, 10, 42-6.
   3  Franks, F., Nature (London) 1966, 210, 87-8.
   4  Yoshida, F.; Yamane, T., Biotechnol. Bioeng. 1971, 13, 691-6.
   5  Skripka, V.G.; Namiot, A.Yu., Zh. Fiz. Khim. 1974, 48, 782.
   6  Sutton, C.; Calder, J.A., Environ. Sci. Technol. 1974, 8, 654-7.
   7  Skripka, V.G., Tr. Vses. Neftegazov. Nauch. Issled. Inst. 1976, 61, 139-51. Sultanov, R.G.; Skripka, V.G., Zh. Fiz. Khim. 1973, 47, 1035.