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Diss Factsheets

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
16 August 1996
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study conducted in accordance with EU Guideline with GLP certificate.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1996
Report date:
1996

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: vapour pressure balance

Test material

Constituent 1
Chemical structure
Reference substance name:
N1-(5-methylhexan-2-yl)benzene-1,4-diamine
Cas Number:
63302-43-2
Molecular formula:
C13H22N2
IUPAC Name:
N1-(5-methylhexan-2-yl)benzene-1,4-diamine
Details on test material:
Sponsor's Identification: TRAE
Date received: 22 April 1996
Description: Very dark purple solid block
Storage conditions: Room temperature

Results and discussion

Vapour pressure
Temp.:
25 °C
Vapour pressure:
0.005 Pa
Remarks on result:
other: The test material did not change in appearance under the conditions used in the determination.

Any other information on results incl. tables

A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 1 gives the following statistical data using an unweighted least squares treatment.

Slope -3589.188

Standard deviation in slope 274.334

Intercept 9.756

Standard deviation in intercept 0.883

The results obtained indicate the following vapour pressure relationship: Log10 (Vp(Pa)) = -3589.188/temp(K) + 9.756

The above yields a vapour pressure at 298.15K with a common logarithm of Log10 (Vp(Pa)) at 298.15K = -2.282.

A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 2 gives the following statistical data using an unweighted least squares treatment.

Slope -4256.645

Standard deviation in slope 288.484

Intercept 11.970

Standard deviation in intercept 0.923

The results obtained indicate the following vapour pressure relationship: Log10 (Vp(Pa)) = -4256.645/temp (K) + 11.970

The above yields a vapour pressure at 298.15K with a common logarithm of Log10 (Vp(Pa)) at 298.15K = -2.307.

A plot of Log10 (vapour pressure (Pa)) versus reciprocal temperature (1/T(K)) for Run 3 gives the following statistical data using an unweighted least squares treatment:

Slope -2825.890

Standard deviation in slope 107.495

Intercept 7.250

Standard deviation in intercept 0.344

The results obtained indicate the following vapour pressure relationship: Log10 (Vp (Pa)) = -2825.890/temp(K) + 7.250

The above yields a vapour pressure at 298.15K with a common logarithm of Log10 (Vp (Pa)) at 298.15K = -2.228.

Summary of results

Run

Log10 (Vp (25°C))

1

-2.282

2

-2.307

3

-2.228

Mean

-2.272

Vapour pressure = 5.3 x 10-3Pa

Applicant's summary and conclusion

Conclusions:
The vapour pressure of TRAE was determined to be 0.0053 Pa at 25 degrees C.
Executive summary:

The vapour pressure of the test substance was determined using a vapour pressure balance system with measurements being made at several temperatures and linear regression analysis used to calculate the vapour pressure at 25 degrees C. The study was conducted in accordance with EU Method A.4.

The vapour pressure of TRAE was determined to be 0.0053 Pa at 25 degrees C.