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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:
2017-06-14 to 2017-07-06
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

PN13590

6.37

70 (exothermic)

80 (endothermic)

190 (exothermic)

-10
+90
-20

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

128

1.92 × 10-2

2

133

2.82 × 10-2

3

143

5.51 × 10-2

4

153

9.80 × 10-2

5

163

1.67 × 10-1

6

168

2.25 × 10-1

7

173

2.69 × 10-1

Conclusions:
The vapour pressure of the test item N,N′-[(methylimino)bis-(trimethlene)]bis-(stearamide) 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 1.3E-6 Pa.
At 25 °C, the vapour pressure is 2.3E-6 Pa.
At 50 °C, the vapour pressure is 3.6E-5 Pa.
Executive summary:

The vapour pressure of the test item N,N′-[(methylimino)bis-(trimethlene)]bis-(stearamide) 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 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 be 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 128 °C to 173°C.

The vapour pressure of the test item N,N′-[(methylimino)bis-(trimethlene)]bis-(stearamide) 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 1.3E-6 Pa.

At 25 °C, the vapour pressure is 2.3E-6 Pa.

At 50 °C, the vapour pressure is 3.6E-5 Pa.

Description of key information

The vapour pressure of the test item N,N′-[(methylimino)bis-(trimethlene)]bis-(stearamide) 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.

 

The vapour pressure of the test item N,N′-[(methylimino)bis-(trimethlene)]bis-(stearamide) 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 1.3 x 10-6Pa.

At 25 °C, the vapour pressure is 2.3 x 10-6Pa.

At 50 °C, the vapour pressure is 3.6 x 10 -5Pa.

Key value for chemical safety assessment

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

Additional information

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 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.

 

Following the assessment of thermal stability, seven measurements of the vapour pressure were performed in the temperature range of 128 °C to 173°C.

The vapour pressure of the test item N,N′-[(methylimino)bis-(trimethlene)]bis-(stearamide) 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 1.3 x 10-6Pa.

At 25 °C, the vapour pressure is 2.3 x 10-6Pa.

At 50 °C, the vapour pressure is 3.6 x 10 -5Pa.

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