Triglycerides, C16 and C18 (unsaturated)

Vapour pressure

Link to relevant study record(s)

Reference

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

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: isothermal thermogravimetry

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Batch No.of test material: 151124012
- Expiration date of the lot/batch: 01 March 2020
- Purity test date: Not reported

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Ambient

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: None

Test no.:

#1

Temp.:

25 °C

Vapour pressure:

0.007 Pa

Test no.:

#2

Temp.:

25 °C

Vapour pressure:

0.01 Pa

Key result

Temp.:

25 °C

Vapour pressure:

0.008 Pa

Remarks on result:

other: See 'Remarks'

Remarks:

The mean vapour pressure determined from run 1 and 2 for the test item.

The results from runs 1 and 3, which were performed using a fresh sample in each case, were reported as the vapour pressure decreased when the same sample was used multiple times. This is because the test item is a multicomponent mixture, and as multiple measurements were made, the more volatile components would have a tendency to evaporate first.

A summary of results for run 1 and 3 is shown in the table below:

Parameter	Run 1	Run 3
Correlation (R^2)	0.9877	0.9830
Slope	-2582	-2450
Intercept	6.501	6.233
log10PTat 25°C	-2.2	-2.0
PT(Pa) at 25°C	0.0069	0.010

Conclusions:

The vapour pressure determined of the test item, Triglycerides, C16 and C18 (unsaturated), was calculated to be 0.008 Pa at 25°C.

Executive summary:

A study to determine vapour pressure of the test item, triglycerides, C16 and C18 (unsaturated), was conducted according to OECD 104 and EC A.4 guidelines. The vapour pressure was determined by the effusion method using isothermal thermogravimetry analysis. The mean vapour pressure for the test item, triglycerides, C16 and C18 (unsaturated), was calculated to be 0.008 Pa at 25°C.

The study was conducted according to standard guidelines and is GLP-compliant and therefore is considered as reliable without restrictions.

Description of key information

The vapour pressure of triglycerides, C16 and C18 (unsaturated) is 0.008 Pa at 25°C.

Key value for chemical safety assessment

Vapour pressure:

0.008 Pa

at the temperature of:

25 °C

Additional information

The vapour pressure of the test item was determined in a study following OECD 104 and EC A.4 guidelines, by the effusion method using isothermal thermogravimetry analysis (Dunning 2019). The study is a GLP compliant, guideline experimental study and is fully acceptable for assessment of this endpoint.