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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
August 02nd, 2011 - August 12th, 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: According to 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:
Amines, C12-14-alkyldimethyl
EC Number:
283-464-9
EC Name:
Amines, C12-14-alkyldimethyl
Cas Number:
84649-84-3
Molecular formula:
R-N(Me)2, whereas R= C12-14-alkyl (even numbered, unbranched, saturated)
IUPAC Name:
N,N-dimethyl-C12-14-(even numbered)-alkyl-1-amines

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
0.009 hPa
Temp.:
25 °C
Vapour pressure:
0.014 hPa
Temp.:
50 °C
Vapour pressure:
0.094 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 135 °C to 269 °C.The measured vapour pressures at the corresponding temperatures are listed in the following table:

 

Temperature / °C

Vapour pressure / hPa

135.2

9.6

157.9

30.4

170.7

50.2

188.7

102.1

201.5

150.0

223.8

300.8

244.1

500.6

258.1

700.1

268.9

898.5

211.2

200.3

179.6

69.6

149.2

19.8

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

9.0× 10-3

9.0× 10-1

25

1.4× 10-2

1.4

50

9.4× 10-2

9.4

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the test substance was 0.9 Pa at 20 °C and 1.4 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

9.0× 10-3

9.0× 10-1

25

1.4× 10-2

1.4

50

9.4× 10-2

9.4