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Physical & Chemical properties

Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to
Guideline:
other: NF T 20-048 AFNOR Sept.85
GLP compliance:
no
Type of method:
static method
Temp.:
20 °C
Vapour pressure:
133.1 Pa
Remarks on result:
other: estimated from vapour pressure curve

Original data:

2.67 kPa at 80 °C

5.60 kPa at 90 °C

11.7 kPa at 110 °C

17.6 kPa at 125 °C

Linear equation: log p = -2326.1*(1/T)+10.059

Accuracy: <10%

Nature of the change during measuring: none

Nature of the change for estimate: none

Temperature of transition: -

An estimate of the vapour pressure:

133.1 Pa at 209 °C

180.8 Pa at 25 °C

243.1 Pa at 30 °C

725.5 Pa at 50 °C

Endpoint:
vapour pressure
Type of information:
other: estimated by calculation
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Calculation based on the literature values for the substances present in the mixture
Qualifier:
no guideline followed
Principles of method if other than guideline:
Calculation method
GLP compliance:
no
Temp.:
25 °C
Vapour pressure:
12 Pa

Description of key information

133.1 Pa at 20 °C

(estimated from measured vapour pressure curve according to OECD 104)

Key value for chemical safety assessment

Vapour pressure:
133.1 Pa
at the temperature of:
20 °C

Additional information

The vapour pressure value for Tar acids, xylenol fraction will vary depending on the ratio of constituents present in the substance. A value of 133.1 Pa at 20 °C was experimentally determined according OECD 104. In a supporting study the vapour pressure of another material was calculated based on literature values for the substances present in the sample to be 12 Pa at 25 °C.