Ethanone, 1-(4-methoxyphenyl)-2-[(3-methoxyphenyl)thio]-

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

June 2006 to Feb 2007

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2007

Report date:

2007

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

GLP compliance:

yes

Type of method:

effusion method: Knudsen cell

Test material

Test material information

Constituent 1

Reference substance name:

-

EC Number:

469-300-0

EC Name:

-

Cas Number:

63675-73-0

Molecular formula:

Hill Empirical Formula: C16H16O3S CAS Empirical Formula: C16H16O3S

IUPAC Name:

1-(4-methoxyphenyl)-2-[(3-methoxyphenyl)sulfanyl]ethan-1-one

Test material form:

solid: particulate/powder

Details on test material:

Sponsor batch no: 151105Purity: 99.9%

Results and discussion

Vapour pressure

Vapour pressure 1

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

ca. 0 Pa

Remarks on result:

other: First vapour pressure

Vapour pressure 2

Test no.:

#2

Temp.:

25 °C

Vapour pressure:

ca. 0 Pa

Remarks on result:

other: Second vapour pressure

Applicant's summary and conclusion

Conclusions:

See below

Executive summary:

The vapour pressure of Beta Ketosulfide was determined in duplicate by the Knudsen Effusion Technique with test temperatures between 20 and 30C. The Clausius-Clapeyron equations were:-

Test 1:       lnp=9433/T - 43.0 with a correlation of 0.5092

Test 2: lnp=26270/T - 98.1 with a correlation of 0.9390

From these regressions, the mean vapour pressures at environmental temperatures were calculated to be:

1.11 x 10^-4Pa at 20C (0.111 mPa)

2.82 x 10^-5Pa at 25C (0.028 mPa)

These results should be interpreted as providing an approximate indication of the vapour pressure only. The melting point of the test substance is approximately 55C, and this restricted the temperature range available for measurements, and hence the reliability of the result.