Guaiacol

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Guideline:

other: no data

GLP compliance:

not specified

Type of method:

other: not specified

Temp.:

25 °C

Vapour pressure:

0.14 hPa

Temp.:

52 °C

Vapour pressure:

1.33 hPa

Temp.:

144 °C

Vapour pressure:

133 hPa

Reference 2

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Principles of method if other than guideline:

no data

GLP compliance:

not specified

Temp.:

79 °C

Vapour pressure:

6.7 hPa

Reference 3

Endpoint:

vapour pressure

Type of information:

other:

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: Probably values from a literature compilation.

GLP compliance:

not specified

Guaiacol is N°1408.

A=7.32082
B=1786.15
C=196.72

This appears to be valid between 88 and 206°C.

Reference 4

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: Secondary literature.

GLP compliance:

not specified

Temp.:

89 °C

Vapour pressure:

ca. 13.3 hPa

Temp.:

103 °C

Vapour pressure:

26.7 hPa

Temp.:

118.6 °C

Vapour pressure:

53.3 hPa

Temp.:

128 °C

Vapour pressure:

80 hPa

Temp.:

141.5 °C

Vapour pressure:

133 hPa

Temp.:

161 °C

Vapour pressure:

267 hPa

Temp.:

183 °C

Vapour pressure:

533 hPa

Temp.:

205 °C

Vapour pressure:

1 013 hPa

10 mm Hg was reached at 85.9°C (Stull) or 92°C (Dykyj).

20 mm Hg was reached at 100°C (Stull) or 106°C (Dykyj).

40 mm Hg was reached at 115.6°C (Stull) or 121.6°C (Dykyj).

60 mm Hg was reached at 125.5°C (Stull) or 131°C (Dykyj).

100 mm Hg was reached at 139°C (Stull) or 144°C (Dykyj).

200 mm Hg was reached at 159.1°C (Stull) or 162.7°C (Dykyj).

400 mm Hg was reached at 181.9°C (Stull) or 184.1°C (Dykyj).

760 mm Hg was reached at 205.6°C (Stull) or 205°C (Dykyj).

Reference 5

Endpoint:

vapour pressure

Type of information:

other: secondary source

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: Secondary literature.

GLP compliance:

not specified

Temp.:

82 °C

Vapour pressure:

13.33 hPa

This paper compiles a list of chemicals which were found in pulp mill effluents, tabulates their physico-chemical and ecotoxicological  properties, and 

explores the feasibility of establishing broad  structure-property-activity relationships.

A vapor pressure = 1333 Pa at 82°C is cited coming from Boublik et al.  (1973).

Reference 6

Endpoint:

vapour pressure

Type of information:

calculation (if not (Q)SAR)

Remarks:

Migrated phrase: estimated by calculation

Adequacy of study:

other information

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: Secondary literature and calculation.

Principles of method if other than guideline:

Method: other (calculated)

GLP compliance:

no

Temp.:

25 °C

Vapour pressure:

0.2 hPa

log g-w = 2.115 (experimental : 2.376)

log g-o = -0.276 (experimental : 0.24)

log Ps = 1.317 corresponding to Ps = 20.7 Pa (experimental : 1.387,  corresponding to 24.4 Pa), supposedly at 25°C.

The authors also calculated  Henry's law constant :
log H = -1.31 corresponding to : 0.049 Pa.m3/mol (experimental : -0.89   corresponding to : 0.129 Pa.m3/mol).
Only for this property is the source cited : Sagebiel et al. (1992).

Description of key information

Different studies providing the following values are reported:
0.14 hPa at 25 °C
6.7 hPa at 79 °C
1.33 hPa at 52 °C
ca. 26.7 hPa at 103 °C
ca. 53.3 hPa at 118.6 °C
ca. 80 hPa at 128 °C
ca. 133 hPa at 141.5 °C
ca. 533 hPa at 183 °C
ca. 1013 hPa at 205 °C

Additional information

The study reporting the value at 25°C has been selected as the key study. As the other values measured at higher temperatures show an increasing Vapour Pressure with temperature, they have been selected as supporting studies.