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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11 Jan 2018 to 16 Feb 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
11 July 2006
Deviations:
no
GLP compliance:
no
Other quality assurance:
other: ISO 9001:2015
Type of method:
effusion method: isothermal thermogravimetry
Specific details on test material used for the study:
- Appearance: Viscous amber liquid (determined by CharlesRiver Den Bosch)
- Purity/Composition: >85%
- Test item storage: At room temperature

Additional information
- Test Facility test item number: 209080/A
- Purity/Composition correction factor: No correction factor required
- Test item handling: No specific handling conditions required
- Molecular structure: Not indicated
- Molecular formula: C63H116O12
- Molecular weight: 1065.6
Key result
Temp.:
20 °C
Vapour pressure:
< 0 Pa

Representative weight loss curves of the test item and benzo(ghi)perylene are shown in Figure 4 and Figure 5. The results are given in Table 3.

During both measurements no significant weight lost was observed. A log pversus1/T curve for the test itemin the range of 210°C and 240°C could not be determined. The coefficient of correlation (r) was < 0.99 (data is archived in the raw data).

The weight losses were compared with the results of benzo[ghi]peryleneat the same temperatures. Theweight loss curve of this reference substance is shown in Figure 5.

Table 3: Results of the Vapour pressure Isothermal TGA Analysis

Temperature
[°C]

Weight loss
[µg/min]

νT
[g/cm2/h]

logνT

logPT

PT
[Pa]

200

0.156195

1.86´10-5

-4.73

-0.92

0.12

 

0.106634

1.27´10-5

-4.90

-1.13

0.074

210

0.151155

1.80´10-5

-4.74

-0.94

0.12

 

0.0979314

1.17´10-5

-4.93

-1.18

0.067

220

0.146704

1.75´10-5

-4.76

-0.95

0.11

 

0.0850913

1.02´10-5

-4.99

-1.25

0.056

230

0.159461

1.90´10-5

-4.72

-0.91

0.12

 

0.135725

1.62´10-5

-4.79

-0.99

0.10

With both analyses the weight loss of the test item was lower than the weight loss ofbenzo[ghi]perylene. Based on this, the vapour pressure of the test item is reported inTable 4to be below that of this reference substance.

Table 4: Vapour Pressure of the Test Item

 

20°C

25°C

 

[Pa]

[mm Hg]

[Pa]

[mm Hg]

Test item

< 1.3´10-8

< 1.0´10-10

< 7.2´10-8

< 5.4´10-10

Conclusions:
The vapour pressure of the test substance was determined to be < 1.3E-8 Pa at 20 °C, under the conditions of the test.
Executive summary:

In this guideline (OECD 104) study, the vapour pressure of the test substance was determined to be 1.3E-8 Pa at 20 °C.

Description of key information

Study conducted to recognised testing guidelines [with GLP certification].

Key value for chemical safety assessment

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

Additional information