Glycerides, tallow sesqui-, hydrogenated, propoxylated

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

07 December 2015 - 26 July 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Principles of method if other than guideline:

Identity: RM1006114
Appearance: White creamy solid (at 20°C)
Storage conditions: Room temperature (15 to 25°C)
Batch number: RL 686/15
Purity: 100%
Expiry date: 30 October 2018
Date received: 12 November 2015

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: vapour pressure balance

Key result

Test no.:

#2

Temp.:

ca. 25 °C

Vapour pressure:

ca. 0.003 Pa

Key result

Test no.:

#3

Temp.:

ca. 25 °C

Vapour pressure:

ca. 0.002 Pa

Key result

Temp.:

ca. 25 °C

Vapour pressure:

ca. 0.002 Pa

The first run was high and variable, which was consistent with the loss of impurities and degassing of the sample and therefore the data was not reported.

Conclusions:

The substance vapour pressure was evaluated in accordance with OECD Guideline 104 and EU Method A.4 via GLP-certified laboratory. Using the vapour pressure balance method the vapour pressure was determined to be 2.3 x 10^-3 Pa at 25°C.

Executive summary:

The substance vapour pressure was evaluated in accordance with OECD Guideline 104 and EU Method A.4 via GLP-certified laboratory. The procedure used the vapour balance method.

The microbalance was calibrated with a UKAS calibrated 1 mg weight. It was found that 1 μg produced a deflection of 1.184 x 10-3 V.

A quantity of test item (0.56 g) was added to the furnace. The apparatus was then assembled and evacuated to a pressure of less than 1.0 x 10-5 Torr (1.3 x 10-3 Pa).

After stabilisation at a given temperature, the shutter was opened to allow a stream of vapour to impact upon one balance pan. The temperature and pan deflection were recorded on a chart recorder. The trace obtained enabled the calculation of mass difference. The furnace temperature was then raised in steps of approximately 5ºC and further measurements taken.

Three runs were performed between temperatures of 27 and 82ºC. The same sample was used for each test, with the pressure being kept at 2.1 x 10-5 Torr (2.8 x 10-3 Pa) or below throughout the tests. The vapour pressure was determined to be 2.3 x 10^-3 Pa at 25°C. The first, of three runs was high and variable, which was consistent with the loss of impurities and degassing of the sample and therefore the data was not reported.

The vapour pressure was determined to be 2.3 x 10^-3 Pa at 25°C.

Description of key information

The substance vapour pressure was evaluated in accordance with OECD Guideline 104 and EU Method A.4 via GLP-certified laboratory. The procedure used the vapour balance method.

The microbalance was calibrated with a UKAS calibrated 1 mg weight. It was found that 1 μg produced a deflection of 1.184 x 10-3 V.

A quantity of test item (0.56 g) was added to the furnace. The apparatus was then assembled and evacuated to a pressure of less than 1.0 x 10-5 Torr (1.3 x 10-3 Pa).

After stabilisation at a given temperature, the shutter was opened to allow a stream of vapour to impact upon one balance pan. The temperature and pan deflection were recorded on a chart recorder. The trace obtained enabled the calculation of mass difference. The furnace temperature was then raised in steps of approximately 5ºC and further measurements taken.

Three runs were performed between temperatures of 27 and 82ºC. The same sample was used for each test, with the pressure being kept at 2.1 x 10-5 Torr (2.8 x 10-3 Pa) or below throughout the tests. The vapour pressure was determined to be 2.3 x 10^-3 Pa at 25°C. The first, of three runs was high and variable, which was consistent with the loss of impurities and degassing of the sample and therefore the data was not reported.

The vapour pressure was determined to be 2.3 x 10^-3 Pa at 25°C.

Key value for chemical safety assessment

Vapour pressure:

0.002 Pa

at the temperature of:

25 °C