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EC number: 203-997-2 | CAS number: 112-69-6
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 5/3/2010-21/4/2010
- 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:
- 2 010
- 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
- Reference substance name:
- Hexadecyldimethylamine
- EC Number:
- 203-997-2
- EC Name:
- Hexadecyldimethylamine
- Cas Number:
- 112-69-6
- Molecular formula:
- C18H39N
- IUPAC Name:
- hexadecyldimethylamine
Constituent 1
Results and discussion
Vapour pressure
- Temp.:
- 20 °C
- Vapour pressure:
- 0.023 Pa
Any other information on results incl. tables
| Temperature (ºC) | Weight loss (µg/min) | VT (g/cm^2/h) | log VT |
| 90 | 8.402 | 1.00x10^-3 | -3.00 |
| 10.44 | 1.25x10^-3 | -2.90 | |
| 100 | 18.91 | 2.26x10^-3 | -2.65 |
| 22.58 | 2.70x10^-3 | -2.57 | |
| 110 | 38.13 | 4.55x10 ^- 3 | -2.34 |
| 44.97 | 5.37x10^-3 | -2.27 | |
| 120 | 69.16 | 8.26x10^-3 | -2.08 |
| 80.06 | 9.56x10^-3 | -2.02 |
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 -5.76 for the logVT, 20 of the test substance. Fitting this value in the regression curve, a vapour pressure of 0.0223 Pa = 1.67 x 10.4mm Hg was obtained.
Applicant's summary and conclusion
- Conclusions:
- The vapour pressure of the test substance at 20ºC (293K) was 0.0223 Pa = 1.67x10^-4 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 0.0223 Pa = 1.67x10^-4 mmHg.
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