Registration Dossier

Administrative data

Endpoint:
vapour pressure
Data waiving:
study technically not feasible
Justification for data waiving:
other:

Data source

Reference
Reference Type:
other: statement
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
yes
Remarks:
study technical not feasible
Principles of method if other than guideline:
1.Dynamic method according EG A.4. 1.6.1:
The vapor pressure curve for a mixture of substances does not lead to very sensible mathematically calculable relationship to Clausius-Clapeyron. This is because the mixture of substances changed during the experiment in its composition. The equilibrium of the boiling temperature / pressure pairs therefore agree with increasing and decreasing pressure do not coincide. This is a policy-compliant evaluation is not possible

2. Effusion methode according to EG A.4. 1.6.5
The measuring range is up to. 1 Pa. For higher steam pressures, the method is not suitable, since the mass loss too high and thus are no longer constant in unit time. Because of the TES, but 28 are already vapor pressures in the range expected by 10 hPa. A test carried out at 25 ° C and 40 ° C was too low vapor pressures in the range between 0.1 and 0.3 hPa

3. Static methode according to EG A.4. 1.6.2:
There is no equilibrium after previous cooling and degassing. I.e. the vapor pressure in the closed apparatus at the set measurement temperature of 25 ° C min of about 20 hPa in the first measurement after 30th Based on more and more. h. After about 4, a steam pressure of 100 hPa is reached without a balance would have set a plateau in Druck-/Zeitdiagramm. A repetition of the experiment showed similar behavior.
Possible reasons: a change in composition due to decomposition or reactions such as with metallic material of the apparatus.
.
Type of method:
other: diverent, see free text

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Applicant's summary and conclusion