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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Ethyl-1-hexanol with Decahydronaphthalene (cis + trans) (decalin, bicyclo[4.4.0]decane) and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 2-Ethyl-1-hexanol; C8H18O; [104-76-7]
NIST Chemistry WebBook
for detail
(3) Decahydronaphthalene (cis+ trans) (decalin, bicyclo [4.4.0]decane); C10H18; [91-17-8]
NIST Chemistry WebBook
for detail
Original Measurements:
Ruiz, F.; Gomis, V.; Botella, R.F., Fluid Phase Equilib. 43, 317-27 (1988).
Variables:
Temperature = 298 K
Prepared By:
A. Skrzecz
Experimental Data:
(Notes on the Nomenclature)
Compositions of coexisting phases
t/°C
T/K
Mass Fraction w
1
Mass Fraction w
2
Mole Fraction x
1
(compiler)
Mole Fraction x
2
(compiler)
Comment(s)
25.0
298.2
0.976
0.000
0.864
0.000
organic-rich phase
25.0
298.2
0.786
0.198
0.745
0.155
organic-rich phase
25.0
298.2
0.593
0.396
0.599
0.331
organic-rich phase
25.0
298.2
0.397
0.597
0.427
0.531
organic-rich phase
25.0
298.2
0.199
0.798
0.227
0.754
organic-rich phase
25.0
298.2
0.000
1.000
0.000
1.000
organic-rich phase
25.0
298.2
0.0242
0.000 85 0.999 (a)
0.000 134
0.000 00
water-rich phase
25.0
298.2
0.0167
0.000 70 0.999
0.000 110
0.000 00
water-rich phase
25.0
298.2
0.0110
0.000 59 0.999
0.000 093
0.000 00
water-rich phase
25.0
298.2
0.0061
0.000 42 1.000
0.000 066
0.000 00
water-rich phase
25.0
298.2
0.0026
0.000 40 1.000
0.000 063
0.000 00
water-rich phase
25.0
298.2
0.0000
0.000 00 1.000 (b)
0.000 000
0.000 00
water-rich phase
Notes:
a
Result of phase equilibrium measurement of binary system 2-ethyl-1-hexanol-water.
b
Result of phase equilibrium measurement of binary system decahydronaphthalene-water.
Method/Apparatus/Procedure:
The analytical method was used. Mixtures of known overall compositions, by weight, were stirred intensely and allowed to settle for 2 h at constant temperature bath. Samples of each phase were taken and analyzed by glc method with 1-propanol as internal standard. (1-propanol also prevented phase separation). Analytical conditions: column 2 m x 3 mm, packed with Chromosorb 101 100/120, temp. 190°C, thermal conductivity detector for the organic phase, flame ionization detector for aqueous phase, helium flow rate-40 mL/min. Decahydronaphthalene was reported to be undetectable in the organic phase.
Source and Purity of Materials:
(1) Merck; used as received; <0.2 wt % impurities by glc.
(2) Merck; used as received; mixture of cis-and trans-isomers.
(3) Source not reported.
Estimated Errors:
Solubility: Not reported.
Temperature: Temp. ±0.1°C.