Registration Dossier
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EC number: 446-630-3 | CAS number: 181587-01-9
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 12 Aug - 04 Oct 1999
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Qualifier:
- according to guideline
- Guideline:
- other: Directive 94/37/EC, Annex I, Section 2, § 2.3
- GLP compliance:
- yes
- Type of method:
- gas saturation method
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: extrapolated
Reference
The trapping and extraction efficiency was checked with two different quantities.
Quantity / µg |
First trap: recovery /% |
Second trap: recovery /% |
Total recovery /% |
4.75 |
109.0 |
0.0 |
109.0 |
36.1 |
95.0 |
0.0 |
95.0 |
The preliminary tests showed that the substance vapours were completely collected by the first adsorption tube. The vapour pressures obtained at 50 °C were found 1.91E-6 and 1.60E-6 Pa when the gas flow rate was respectively 1 an 0.5 L/min. These results did not show a dependence on the flow rate.
Temperatur / K |
324.8 |
315.5 |
Vapour pressure / Pa |
1.6 E-6 |
6.3 E-7 |
The logarithm of the vapour pressure was found to be linear function of the inverse of the thermodynamic temperature according to the equation below.
Log P = (-5098 / T) + 8.05
The vapour pressure of the substance, calculated at 25 °C (298 K) was found to be 9.1E-8.
For the impurity profile of the test item recovered from the Raschig rings no significant changes were detected in the size or number of peaks observed. The quantification analysis by HPLC showed that the test item was stable under the operating conditions used for the experiment.
Description of key information
< 0.0001 Pa at 25 °C
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure (9.1E-08 Pa at 25 °C) of the test item was determined according to OECD Guideline 104.
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