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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Naphthalene with Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) Naphthalene; C10H8; [91-20-3]
NIST Chemistry WebBook
for detail
Original Measurements:
Schwarz, F.P., J. Chem. Eng. Data. 1977, 22, 273-7.
Variables:
Temperature = 8.4 °C - 31.8 °C
Prepared By:
A. Maczynski
Experimental Data:
(Notes on the Nomenclature)
Solubility of naphthalene in water
t/°C
10
4
* Concentration c
1
[mol dm**-3]
g
1
/100 g solution (compiler)
g
1
/100 g soln. Note (compiler)
10
6
* Mole Fraction x
1
(compiler)
8.4
1.40 ± 0.02
1.79
3
2.52
11.1
1.49 ± 0.03
1.91
3
2.68
14.0
1.66 ± 0.05
2.13
3
2.99
17.5
1.88 ± 0.03
2.41
3
3.39
20.2
2.07 ± 0.02
2.65
3
3.73
23.2
2.22 ± 0.03
2.85
3
4.00
25.0
2.36 ± 0.02
3.03
3
4.25
26.3
2.48 ± 0.02
3.18
3
4.47
29.2
2.68 ± 0.02
3.44
3
4.83
31.8
2.83 ± 0.02
3.63
3
5.10
Method/Apparatus/Procedure:
Two methods were used.
At 25°C the solubility of (1) in (2) was determined from UV absorption measurements and was used as a standard at other temperatures. At other temperatures the spectrofluorimetry method was used.
The sealed fluorescence cells contained 5 mL of the aqueous solution and an excess of (1) were rotated at least 72 h in a water bath, then removed, quickly wiped dry and placed in the fluorimeter.
Source and Purity of Materials:
(1) source not specified; better than 99.9 mole%, by glc; used as received.
(2) distilled over KMnO
4
and Na OH and passed through a Sephadex column.
Estimated Errors:
Solubility: see above
Temperature: ± 0.1°C