Registration Dossier
Registration Dossier
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EC number: 268-220-1 | CAS number: 68037-96-7 This substance is identified by SDA Substance Name: C16-C18 and C18 unsaturated alkyl dimethyl amine and SDA Reporting Number: 11-040-00.
Vapour pressure
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:
- 2 011
- 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
- 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
Constituent 1
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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