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Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From May 15, 2017 to July 12, 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: Knudsen cell
Specific details on test material used for the study:
Substanc name: linseed oil, ester with pentaerythritol
Batch no: 16.343.096
Appearance: yellow liquid
Composition: 100% UVCB
Purity: 100% as the substance is an UVCB
Homogeneity: homogeneous
Expiry date: 05. Oct. 2017
Storage Room Temperature:(20 ± 5°C), After opening keep under inert gas.
Key result
Test no.:
#1
Temp.:
ca. 20 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#2
Temp.:
ca. 25 °C
Vapour pressure:
0.001 Pa

Experimentally determined vapour pressures:

T T P Stand. Dev. P RSD P
°C K Pa Pa %
75 348.2 1.01E-02 1.96E-03 19.50%
90 363.2 1.95E-02 1.98E-03 10.20%
105 378.2 4.06E-02 1.04E-02 25.70%

In this table, E-0X represents multiplication with 10-X.

Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation

Calculated vapour pressures:

Vapour pressure at 20°C: 3.66 * 10-04 Pa
Vapour pressure at 25°C: 5.19 * 10-04 Pa
Conclusions:
Under the study conditions, calculated vapour pressure of the test substance is 3.66E-4 and 5.19E-4 Pa at 20 and 25°C respectively.
Executive summary:

A study was conducted to determine the vapour pressure of the test susbtance, using the effusion method (weight loss) according to OECD Guideline 104, and EU Method A.4. The vapour pressure of the test substance was determined at nine different temperatures (30, 45, 60, 75, 90, 105, 120, 135 and 150°C). Experiment 1 -3 and 7 -9 (nominal temperature 30 - 60 and 120 - 150°C) showed no reproducible weight loss. When visible contaminations, caused by explosive evaporation of the test substance, were observed, the cells were meticulously cleaned and weighed. This weight was used as initial weight for the subsequent measurements. To avoid bias, these measurements were not used for calculations. Three experiments could be evaluated as they showed relevant and reproducible weight loss. All evaluated experiments showed good reproducibility, giving relative standard deviations of less than 26% and good correlation. Therefore, the result of the test can be considered valid. Under the study conditions, calculated vapour pressure of the test substance is 3.66E-4 and 5.19E-4 Pa at 20 and 25°C respectively (Krebs, 2018).

Description of key information

The vapour pressure of the test substance was determined using the effusion method (weight loss) according to OECD Guideline 104 and EU Method A.4 (Krebs, 2018).

Key value for chemical safety assessment

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

Additional information