Octadecanoic acid, reaction products with triethylenetetramine

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-07-05 - 2017-07-12

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:

2006-03-23

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

2008-05-30

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: vapour pressure balance

Key result

Temp.:

20 °C

Vapour pressure:

0 Pa

Remarks on result:

other: calculated by extrapolation of the measured vapour pressure curve

Key result

Temp.:

25 °C

Vapour pressure:

0 Pa

Remarks on result:

other: calculated by extrapolation of the measured vapour pressure curve

Key result

Temp.:

50 °C

Vapour pressure:

0 Pa

Remarks on result:

other: calculated by extrapolation of the measured vapour pressure curve

THERMAL STABILITY

During the assessment of thermal stability with DSC, in the temperature range of 70 - 80 °C a small exothermic effect directly followed by an endothermic effect in the temperature range of 80 - 95 °C was observed. A small and broad exothermic effect in the temperature range of 190 - 230 °C could by observed. No further thermal effects were observed up to the test end temperature of 300 °C.

Results of the DSC-measurement:

No.	Sample weight / mg	Start / °C	Energy / J/g	Remark
PN13726	7.33	50 (endothermic)	+130	Figure 1

VAPOUR PRESSURE

The vapour pressure was measured in the temperature range of 128 °C to 173 °C.

Results of the effusion method (vapour pressure balance):

No.	Temperature / °C	Vapour pressure / Pa
1	64	4.31 × 10^-4
2	78	1.81 × 10^-3
3	102	1.41 × 10^-2
4	108	1.97 × 10^-2
5	118	4.20 × 10^-2
6	123	5.96 × 10^-2
7	128	8.51 × 10^-2

Conclusions:

The vapour pressure of the test item Octadecanoic Acid, reaction products with triethylenetetramine was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C.
At 20 °C, the vapour pressure is 3.4E-6 Pa.
At 25 °C, the vapour pressure is 6.3E-6 Pa.
At 50 °C, the vapour pressure is 1.1E-4 Pa.

Executive summary:

The vapour pressure of the test item Octadecanoic acid, reaction products with triethylenetetramine was determined by the "effusion method: vapour pressure balance" according to OECD Guideline 104 (23 March 2006) and according to the test method A.4."Vapour Pressure" as described in the Council Regulation (EC) No 440/2008 of 30 May 2008.

 

Before performing the test to determine the vapour pressure, the thermal stability of the test item was assessed with a DSC-measurement up to a temperature of 300 °C. In the temperature range of 50 – 130 °C an endothermic effect was observed. No further thermal effects were observed up to the test end temperature of 300 °C.

Following the assessment of thermal stability, seven measurements of the vapour pressure were performed in the temperature range of 64 °C to 128 °C.

The vapour pressure of the test item Octadecanoic acid, reaction products with triethylenetetramine was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C.

At 20 °C, the vapour pressure is 3.4E-6 Pa.

At 25 °C, the vapour pressure is 6.3E-6 Pa.

At 50 °C, the vapour pressure is 1.1E-4 Pa.

Description of key information

The vapour pressure of the test item Octadecanoic acid, reaction products with triethylenetetramine was determined by the "effusion method: vapour pressure balance" according to OECD Guideline 104 (23 March 2006) and according to the test method A.4."Vapour Pressure" as described in the Council Regulation (EC) No 440/2008 of 30 May 2008.

 

Before performing the test to determine the vapour pressure, the thermal stability of the test item was assessed with a DSC-measurement up to a temperature of 300 °C.

In the temperature range of 50 – 130 °C an endothermic effect was observed. No further thermal effects were observed up to the test end temperature of 300 °C.

Following the assessment of thermal stability, seven measurements of the vapour pressure were performed in the temperature range of 64 °C to 128 °C.

The vapour pressure of the test item Octadecanoic acid, reaction products with triethylenetetramine was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C.

At 20 °C, the vapour pressure is 3.4E-6 Pa.

At 25 °C, the vapour pressure is 6.3E-6 Pa.

At 50 °C, the vapour pressure is 1.1E-4 Pa.

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

20 °C