Registration Dossier

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: study well documented, meets generally accepted scientific principles

Data source

Reference
Reference Type:
publication
Title:
Vapour pressure and enthalpy of vaporization of aliphatic dialkyl carbonates.
Author:
Kozlova SA, Emel'yanenko VN, Georgieva M, Verevkin SP, Chernyak Y, Schäffner B, Börner A
Year:
2008
Bibliographic source:
J Chem Thermodyn 40, 1136-1140 (2008)

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
The vapour pressures of diethyl carbonate were determined using the transpiration method: About 0.5 g of the sample was mixed with glass beads and placed in a thermostatted U-shaped tube. At constant temperature (±0.1 K), a nitrogen stream was passed through the U-tube and the transported amount of gaseous material was collected in a cooling trap. The flow rate of the nitrogen stream was measured using a soap bubble flow meter. The amount of condensed substance was determined by GC analysis using an external standard. The saturation vapour pressure p (sat/i) at each temperature Ti was calculated from the amount of the product collected within a definite period of time. The values of psat were calculated with the equation:

p (sat/i)=mi R Ta/V Mi; V=V( N2) + V i; (V (N2)>>V i)

with
R : 8.314472 J/K x mol
mi: mass of the transported compound
Mi: molar mass of the compound
Vi: volume contribution to the gaseous phase
V (N2): volume of the carrier gas and
Ta: temperature of the soap bubble meter

GLP compliance:
not specified
Type of method:
other: transpiration method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): diethyl carbonate
- Substance type: ester
- Physical state: liquid
- Analytical purity: >=99%
- Impurities (identity and concentrations): GC showed no traceable amounts of impurities
- Composition of test material, percentage of components:

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
10.78 hPa
Temp.:
25 °C
Vapour pressure:
15.36 hPa

Applicant's summary and conclusion

Conclusions:
Vapour pressures of 10.78 and 15.36 hPa were determined for diethyl carbonate at temperatures of 20 and 25°C, respectively.
Executive summary:

Vapour pressures of diethyl carbonate at various temperatures were determined using the transpiration method. At 20 and 25°C, vapour pressures of 10.78 and 15.36 hPa were determined, respectively. The applicability of the transpiration method was confirmed by comparison with literature data.