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Environmental fate & pathways

Henry's Law constant

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Administrative data

Endpoint:
Henry's law constant
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference
Reference Type:
publication
Title:
Comparison of headspace and gas-stripping methods for determining the Henry's law constant (H) for organic compounds of low to intermediate H
Author:
Sagebiel J.C., Seiber J.N. and Woodrow J.E
Year:
1992
Bibliographic source:
Chemosphere, 25: 1763-1768

Materials and methods

Principles of method if other than guideline:
No data
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Guaiacol
EC Number:
201-964-7
EC Name:
Guaiacol
Cas Number:
90-05-1
Molecular formula:
C7H8O2
IUPAC Name:
2-methoxyphenol
Details on test material:
Guaiacol was obtained from Aldrich Chemical Co.
Reported purities were 99%, and it was used without further cleanup.

Results and discussion

Henry's Law constant H
H:
0.11 Pa m³/mol
Temp.:
25 °C

Applicant's summary and conclusion

Executive summary:

Guaiacol solution (1000 ppm) was placed in a headspace vial, sealed, thermostated and then pressurized to ca. 179 kPa gauge. The vapour was sampled and analysed by gas chromatography. The Henry's law constant measured was 0.11 Pa.m3/mole at 25°C.