(S)-1,2-epoxypropane

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2002

Reliability:

2 (reliable with restrictions)

Data source

Reference

Reference Type:

review article or handbook

Title:

Unnamed

Year:

2002

Materials and methods

Principles of method if other than guideline:

Experimental measurement (data is taken from a reliable published summary report, information about the methodology is not available).

GLP compliance:

no

Type of method:

other:

Test material

Test material information

Constituent 1

Reference substance name:

propylene oxide

IUPAC Name:

propylene oxide

Constituent 2

Reference substance name:

Methyloxirane

EC Number:

200-879-2

EC Name:

Methyloxirane

Cas Number:

75-56-9

IUPAC Name:

2-methyloxirane

Details on test material:

Test material was racemate from both R(+) and S(-) propylene oxide. This endpoint is not measured / determined with enantio-selective sensors.
Therefore the S(-) value is identical to the racemate endpoint.

Results and discussion

Vapour pressure

Temp.:

20 °C

Vapour pressure:

> 58.4 - < 61.2 kPa

Any other information on results incl. tables

The vapour concentration could only be estimated at the flash point temperature since the vapour pressure was only reported to -24.17°C and the Antoine constants calculated by McDonald et al. (1959) were only valid to -20°C. Therefore, it was not possible to validate the lower explosive limit or flash point in this way.

Applicant's summary and conclusion

Conclusions:

Several reliable measured vapour pressures are reported giving values in the range of 55 - 70 kPa between 19 and 25°C. The true value of the vapour pressure is probably between 58.4 and 61.2 kPa at 20°C. The middle of this range, 59.8 kPa, shall be used for exposure assessment.