PDI oligomers, isocyanurate (3x)

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 13 March 2017 to 14 March 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

2009

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

2006

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7950 (Vapor Pressure)

Version / remarks:

1996

Deviations:

no

GLP compliance:

yes

Type of method:

effusion method: isothermal thermogravimetry

Test material

Test material information

Constituent 1

Reference substance name:

1,3,5-tris(5-isocyanatopentyl)-1,3,5-triazinane-2,4,6-trione

Cas Number:

119934-71-3

Molecular formula:

C21 H30 N6 O6

IUPAC Name:

1,3,5-tris(5-isocyanatopentyl)-1,3,5-triazinane-2,4,6-trione

Constituent 2

Reference substance name:

2-methylpropyl N-(5-isocyanatopentyl)-N-(5-isocyanatopentylcarbamoyl)carbamate

Molecular formula:

C18 H30 N4 O5

IUPAC Name:

2-methylpropyl N-(5-isocyanatopentyl)-N-(5-isocyanatopentylcarbamoyl)carbamate

Test material form:

liquid: viscous

Details on test material:

Appearance: colourless or light yellow viscous liquid
Storage conditions: at room temperature, container tightly closed, flushed with nitrogen.

Specific details on test material used for the study:

reaction and/or decomposition at > 200°C

Results and discussion

Vapour pressure

Vapour pressure 1

Key result

Temp.:

20 °C

Vapour pressure:

< 0 Pa

Vapour pressure 2

Key result

Temp.:

25 °C

Vapour pressure:

< 0 Pa

Any other information on results incl. tables

The log PT versus 1/T curve for the substance over the range 150-180°C showed poor linearity (correlation coefficient r < 0.99). Extrapolation of the curve to 20°C or 25°C would not give reliable results for the vapour pressure of the substance at these temperatures.

Since the weight losses of the test item at 160°C, 170°C, 180°C and 190°C were lower than the weight losses of reference substance chrysene at the same temperatures, it was concluded that the vapour pressure of the substance at 20°C (25°C) is lower than the vapour pressure of chrysene at 20°C (25°C).

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the substance at 20°C was determined to be < 8.4E-07 Pa.
The vapour pressure of the substance at 25°C was determined to be < 2.2E-06 Pa.

Executive summary:

The vapour pressure of the substance was determined using the isothermal thermogravimetric effusion method in a GLP study according to EC A.4, OECD 104 and OPPTS 830.7950. From the measured weight losses in the temperature range 160°C -190°C the vapour pressure of the substance was determined to be lower than the vapour pressure of reference substance chrysene. The vapour pressure of the substance at 20°C and 25°C was therefore concluded to be < 8.4E-07 Pa and < 2.2E-06 Pa, resp.