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Physical & Chemical properties

Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
15 July to 15 August 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-compliant, guideline study
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
not applicable
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: vapour pressure balance
Temp.:
25 °C
Vapour pressure:
0.003 Pa
Remarks on result:
other: Mean value
Conclusions:
The vapour pressure of di-tert-nonyl polysulfide at 25°C is 0.00325 Pa.
Executive summary:

Fox (2010) is a GLP-compliant, vapour pressure balance method study following an equivalent to EC method A4. The study is considered reliable and suitable for use for this endpoint.

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
10/05/06 - 06/06/06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant, Guideline study, Acceptable without restrictions
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
not specified
GLP compliance:
yes
Type of method:
gas saturation method
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Extrapolated from experimental results
Conclusions:
The vapour pressure of 300 µPa at 25°C was extrapolated from an experimentally derived curve by results of 3.5 mPa at 50°C, 7.8 mPa at 60°C and 19 mPa at 70°C.
Executive summary:

Weissenfeld (2006) is a GLP-compliant gas saturation study which follows OECD guideline 104. The study is considered reliable and suitable for this endpoint.

Description of key information

The vapour pressure of 300 µPa at 25°C was extrapolated from an experimentally derived curve by results of 3.5 mPa at 50°C, 7.8 mPa at 60°C and 19 mPa at 70°C.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

The vapour pressure of di-tert-nonyl polysulfide was measured at test temperatures 50, 60 and 70°C and was determined to be3.5 x 10-5 hPa at 50°C, 7.8 x 10-5 hPa at 60°C, 1.9 x 10-4 hPa at 70°C. The retention time of di-tert-nonyl polysulfide was at about 2.7 minutes for the first, 3.2 minutes for the second and 4.0 minutes for the third peak under these HPLC conditions. To quantify di-tert-nonyl polysulfide, the sum of the peak areas of all three peaks was used. The above key result is taking from Weissenfeld (2006) is a GLP-compliant gas saturation study which follows OECD guideline 104. The study is considered reliable and suitable for this endpoint.