A mixture of: N,N-di(hydrogenated alkyl C14-C18)phthalamic acid; dihydrogenated alkyl (C14-C18)amine

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1991

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study was conducted according to a current approved guideline and following good laboratory practices.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1992

Report date:

1992

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

GLP compliance:

yes

Type of method:

static method

Test material

Test material information

Constituent 1

Reference substance name:

Stepan TAB-2

IUPAC Name:

Stepan TAB-2

Constituent 2

Reference substance name:

A mixture of: N,N-di(hydrogenated alkyl C14-C18)phthalamic acid; dihydrogenated alkyl (C14-C18)amine

EC Number:

413-800-3

EC Name:

A mixture of: N,N-di(hydrogenated alkyl C14-C18)phthalamic acid; dihydrogenated alkyl (C14-C18)amine

Cas Number:

87787-81-3

Molecular formula:

C44H79NO3

IUPAC Name:

2-(dioctadecylcarbamoyl)benzoic acid; 2-(ditetradecylcarbamoyl)benzoic acid; 2-[(propan-2-yloxy)carbonyl]benzoic acid; 2-[octadecyl(tetradecyl)carbamoyl]benzoic acid; 2-octadecyl-2,3-dihydro-1H-isoindole-1,3-dione; 2-tetradecyl-2,3-dihydro-1H-isoindole-1,3-dione; benzene-1,2-dicarboxylic acid; dioctadecylamine; ditetradecylamine; octadecyl(tetradecyl)amine

Constituent 3

Reference substance name:

reaction mass of: N,N-di(hydrogenated alkyl C14-C18)phthalamic acid dihydrogenated alkyl (C14-C18)amine

IUPAC Name:

reaction mass of: N,N-di(hydrogenated alkyl C14-C18)phthalamic acid dihydrogenated alkyl (C14-C18)amine

Constituent 4

Reference substance name:

87787-81-3

EC Number:

618-070-1

Cas Number:

87787-81-3

IUPAC Name:

87787-81-3

Details on test material:

Test substance was treated as 100% pure. Test substance is stable at 50 deg C and Stored at room temperature in the dark. Expiry date April 30, 1992. Batch number of test substance: 198308.

Results and discussion

Vapour pressure

Temp.:

25 °C

Vapour pressure:

0.12 Pa

Any other information on results incl. tables

During the measurements 1 -14, made at 23.53 deg C, a decrease in vapour pressure could be observed. Therefore the sample was evacuated for 10 sec after each measurement. This decrease in vapour pressure was probably caused by the presence of a volatile impurity. Because the sample was re-exposed to a fresh vacuum at the start of each measurement, the most volatile impurity was removed gradually. This impurity was removed after approximately 14 measurements, indicating that the amount of this impurity was relatively low. Therefore the 10 second evacuation step between the measurements was stopped. The vapour pressure became nearly stable, therefore the vapour pressure was considered to show ideal behaviour. When raising the temperature it took some time (a few measurements) before the vapour pressure stabilized. This was probably caused by a bad heat contact within the test substance.

In order to obtain the vapour pressure at each temperature, the resulting vapour pressure readings in each series were averaged. The results were provided in Table 1 of the report.

The resulting values provided were plotted against the reciprocal temperature (1/T) in Kelvin, taking into account the calculated error.

The vapour pressure of Stepan TAB-2 at 25 deg C was interpolated from the vapour pressure curve and determined to be 0.12 Pa with an estimated error of +-0.02 Pa, i.e., (9.0 +-1.1) E-004 mm Hg.

Applicant's summary and conclusion

Conclusions:

The vapour pressure at 25 deg C of Stepan TAB-2 was determined by the static method to be: 0.12 +- 0.02 Pa or (9.0 +- 1.1) x E-004 mm Hg.