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Physical & Chemical properties

Vapour pressure

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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
August 01st, 2011 - August 09th, 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: According to the OECD Guideline 104 and EU method A.4

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report date:
2011

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
no
Type of method:
dynamic method

Test material

Constituent 1
Chemical structure
Reference substance name:
Hexadecyldimethylamine
EC Number:
203-997-2
EC Name:
Hexadecyldimethylamine
Cas Number:
112-69-6
Molecular formula:
C18H39N
IUPAC Name:
N,N-dimethylhexadecan-1-amine

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
0 hPa
Temp.:
25 °C
Vapour pressure:
0 hPa
Temp.:
50 °C
Vapour pressure:
0.004 hPa

Any other information on results incl. tables

Vapour Pressure (Dynamic Method):

The vapour pressure was measured with the dynamic method in the temperature range of 175 °C to 285 °C.The measured vapour pressures at the corresponding temperatures are listed in the following table:

 

Temperature / °C

Vapour pressure / hPa

175.0

9.6

202.2

30.2

212.1

50.0

234.0

99.7

245.6

150.3

264.6

299.8

284.7

499.5

222.4

69.5

193.8

20.1

The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C as shown here:

T / °C

p / hPa

p / Pa

20

2.0× 10-4

2.0× 10-2

25

3.4× 10-4

3.4× 10-2

50

3.6× 10-3

3.6× 10-1

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the test substance was 0.02 Pa at 20°C and 0.034 Pa at 25°C.
Executive summary:

The vapour pressure of the test item was determined according to the European Commission Regulation (EC) No. 440/2008, Part A: Methods for the determination of physico-chemical properties A.4. Vapour pressure: Vapour pressure (dynamic method) and OECD test guideline OECD 104 (Vapour pressure).

The Antoine constants from the regression of the data from the dynamic method were used to calculate the vapour pressure for 20, 25 and 50 °C:

T / °C

p / hPa

p / Pa

20

2.0× 10-4

2.0× 10-2

25

3.4× 10-4

3.4× 10-2

50

3.6× 10-3

3.6× 10-1

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