Diethyl carbonate

Vapour pressure

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

Test material information

Constituent 1

Reference substance name:

Diethyl carbonate

EC Number:

203-311-1

EC Name:

Diethyl carbonate

Cas Number:

105-58-8

Molecular formula:

C5H10O3

IUPAC Name:

diethyl carbonate

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 pressure

Vapour pressure 1

Temp.:

20 °C

Vapour pressure:

10.78 hPa

Vapour pressure 2

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.