Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Results of standard method testing w ere reported in a reliable review dossier.

Data source

Reference
Reference Type:
review article or handbook
Title:
ROBUST SUMMARY OF INFORMATION ON LUBRICATING OIL BASESTOCKS
Author:
American Petroleum Institute
Year:
2003
Bibliographic source:
ROBUST SUMMARY OF INFORMATION ON LUBRICATING OIL BASESTOCKS pag 6-7

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
not specified
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Vapour pressure
Temp.:
ca. 298.15 K
Vapour pressure:
>= 0 - <= 0 Pa

Any other information on results incl. tables

Three runs on the sample were conducted. There was initially substantial reduction (equivalent to 3°C temperature change) of estimated VP on prolonged pumping after Run 1 but this was reduced to the equivalent of 0.65°C change between Runs 2 and 3. The latter runs provided values at room temperature of 1.882 and 1.563 x 10-4 Pascals, yielding a mean value of Vp (298.15K) = 1.723 x 10-4 Pascals. The condensation rates onto the pan observed in Run 3 increased with temperature more rapidly than the mass difference indicating an increasing efficiency of condensation and thus precluding the use of the condensation data to produce a satisfactory VP relation. The final values of rate of condensation were however equivalent in pressure regime to the mass differences assuming a rough equality between the numerical magnitudes of temperature and molar mass.

Applicant's summary and conclusion