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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Sept 28, 2010 - Jan 20, 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was conducted according to an internationally recognised method, and under GLP. No deviation was reported. The substance is adequately characterised. Therefore full validation applies.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
+ EU-Method A.4 "Vapeur Pressure" dated 24. Aug . 2009
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
Copy of the GLP certificate (annex 1 of the attached full report)
Type of method:
static method

Test material

Constituent 1
Chemical structure
Reference substance name:
6,8-dimethylnon-7-enal
EC Number:
486-670-9
Cas Number:
899810-84-5
Molecular formula:
C11H20O
IUPAC Name:
6,8-dimethylnon-7-enal
Test material form:
other: Liquid
Details on test material:
Appearance : liquid
Composition : Noreenal (6,8-dimethyl-non-7 -enal mixture of isomers) > 96%; 4,8-d imethyl-7-nonena l max 2.2% 6,8-dimethyl-7- nonenol max 0.5%
CAS No.: 899810-84-5
ELINCS-No.: 486-670-9
Purity : 99.14% (sum of isomers)
Solubility : H20: < 0.1 g/L; EtOH; aceto ne: > 1 g/L; CH3CN
Production : date 01. Feb.2009
Expiry : date 01. Feb. 2011
Storage : Room Temperature: (20 ± 5°C)

Results and discussion

Vapour pressureopen allclose all
Temp.:
25 °C
Vapour pressure:
ca. 85 Pa
Temp.:
20 °C
Vapour pressure:
ca. 68 Pa

Any other information on results incl. tables

The vapeur pressure of the test item was measured as 68 Pa at 20°C, and 85 Pa at 25°C .

ln the first experiment the measured values of the heating and cooling down phase differed especially at the lower temperatures. This might be caused by using only tempera tures under 50°C, where the measured pressure is very low for the used measuring head. Therefore a second experiment with an enhanced temperature range was conducted, to yield more consistent pressure values at higher temperatures.

ln the second experiment the correspondence of the values is very good. Therefore the results of the second experiment and the study were considered valid.

Applicant's summary and conclusion

Conclusions:
Using the static method, vapour pressures of 68 Pa at 20°C and 85 Pa at 25°C were determined.
Executive summary:

Using the static method, vapour pressures of 68 Pa at 20°C and 85 Pa at 25°C were determined.

These values were calculated from the regression of 17 individual measurements .

The measured values for pressure P and temperature T were used to calculate pairs of log P and 1/T. These values were plotted, from the linear regression, vapour pressures at ambient temperature were determined .