Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2019
Report Date:
2019

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: by loss of weight or by trapping vaporisate

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: crystalline

Results and discussion

Vapour pressure
Key result
Remarks on result:
not determinable
Remarks:
At a temperature of appr. 53 °C a continuously descreasing vapor pressure value was recorded. This could indicate a thermally caused change of the test item. Since the test item is a dried compound we assume the recorded pressure values are due to water escaping the test substance during the measurement at declining rates.

Any other information on results incl. tables

Results

In the temperature range used for vapor pressure measurements the test item was solid.

Temperature [°C]

Vapour pressure [hPa]

Cell 7

Vapour pressure [hPa]

Cell 6

53.0

7.4*10-4

5.3*10-4

53.0

4.2*10-5

3.0*10-5

53.0

2.9*10-5

1.9*10-5

53.0

1.9*10-5

1.3*10-5

53.1

5.9*10-6

<1*10-6

Molar mass used for the calculation: 261.7897 g/mol.

No regression was calculated.

The Vapor Pressure could not be determined.

Remarks

At a temperature of appr. 53 °C a continuously descreasing vapor pressure value was recorded. This could indicate a thermally caused change of the test item. Since the test item is a dried

compound we assume the recorded pressure values are due to water escaping the test substance during the measurement at declining rates.

Applicant's summary and conclusion