Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Before 1973
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Justification for type of information:
The study was conducted before OECD criteria were adopted. The method used for the assessment is a recognized test principle in the OECD guideline no. 104.

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
1973
Report Date:
1973

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
not specified
GLP compliance:
no
Type of method:
effusion method: Knudsen cell
Remarks:
Differential colorimetry combined with Knudsen effusion

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
- Purity: 99.5 moles %
- Source: Fluka

Results and discussion

Vapour pressure
Key result
Temp.:
298 K
Vapour pressure:
0 Pa

Any other information on results incl. tables

Vapour pressure at 25°C (298 K) was calculated using the Clapeyron-Clausius equation from the ΔHvap= 29055 cal/mol at 467 K and corresponding vapour pressure 6.16 e-5 atm.

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the test item is 1.2 e-7 Pa at 25°C indicating low volatility.
Executive summary:

In this study, vapour pressure of the test item was assessed utilizing a technique based on differential calorimetry combined with Knudsen effusion cell. The data reported allowed to calculate the vapour pressure at 25°C (298 K), i.e. 1.2 e-7 Pa. The test substance has a low volatility.