Registration Dossier

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
25/3/2010-29/7/2010
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:
2010
Report date:
2010

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: by loss of weight or by trapping vaporisate

Test material

Constituent 1
Chemical structure
Reference substance name:
Decyldimethylamine
EC Number:
214-302-7
EC Name:
Decyldimethylamine
Cas Number:
1120-24-7
Molecular formula:
C12H27N
IUPAC Name:
decyldimethylamine

Results and discussion

Vapour pressure
Temp.:
20 °C
Vapour pressure:
6.4 Pa

Any other information on results incl. tables

Temperature (ºC)  Weight loss (µg/min)  VT (g/cm^2/h)  log VT 
40  21.46  2.56x10^-3  -2.59 
  20.58  2.46x10^-3  -2.61 
50  50.47  6.02x10^-3  -2.22 
  49.68  5.93x10^-3  -2.23 
60  105.4  1.26x^10 -2  -1.90 
  104.4  1.25x10^-2  -1.90 

The plot of the log vT of the test substance as function of the reciprocal temperatures showed a coefficient of correlation (r) of > 0.99. Extrapolation of the curve to 20°C resulted in a value of -3.39 for the logVT, 20 of the test substance. Fitting this value in the regression curve, a vapour pressure of 6.40 Pa = 4.80 x 10.2mm Hg was obtained.

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the test substance at 20ºC (293K) was 6.40 Pa = 4.80x10^-2 mmHg.
Executive summary:

The test was perfomanced according to the OECD Guideline 104 and EU method A.4. The isothermal thermogravimetric effusion method was chosen for the determination of the vapours pressure of the test substance. The vapour pressure of the test substance at 20ºC (293K) was 6.40 Pa = 4.80x10^-2 mmHg.