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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
Test method was found not to be suitable for the test material
Principles of method if other than guideline:
A sample of Isophoronediamine-cresyl glycidyl ether adduct was analyzed by Thermogravimetric Analysis (TGA) in order to determine the boiling point of the material. Conventional boiling point techniques could not detect a boiling point for this material.
GLP compliance:
yes (incl. certificate)
Type of method:
other: Thermogravimetric Analysis
Boiling pt.:
197 °C
Atm. press.:
101.2 kPa
Decomposition:
yes
Decomp. temp.:
> 197 °C

An attempt was made to determine the boiling point of the sample by the Siwoloboff method in a heated metal block using photocell detection consistent with OECD Guidelines for The Testing of Chemicals, 103, July 27 1995. However, the instrument was unable to detect a boiling point due to sample loading issues. As a result, a deviation from the OECD 103 guideline was necessary and the boiling point test was obtained by performing thermogravimetric analysis (TGA) on the sample.

Using thermogravimetric analysis, the sample is placed in a DSC hermetic pan with a laser drilled pinhole in the lid. When the sample starts to boil, the vapor pressure in the pan increases causing a weight loss through the pinhole in the lid. The onset of the derivative of this weight loss is taken to be the boiling point of the sample.

The boiling point was measured using a TA Instruments 2950 TGA and hermetic pin-hole DSC pans. Approximately 4 mg samples were analyzed. The sample was heated from room temperature to 500°C at 5°C/min. Two replicate trials were performed.

The TGA results indicate Isophoronediamine-cresyl glycidyl ether adduct has two components boiling at different temperatures. The lowest boiling component has a boiling point of 470°K (197°C) average and is not completely resolved from the higher boiling component.

Conclusions:
The first boiling point of Isophoronediamine-cresyl glycidyl ether adduct is 470°K (197°C). There is one boiling peak above this temperature. However, the sample may be decomposing while boiling at the higher temperatures. To be conservative, the lowest boiling component is reported as the boiling point of the sample
Executive summary:

The first boiling point of Isophoronediamine-cresyl glycidyl ether adduct is 470°K (197°C). There is one boiling peak above this temperature. However, the sample may be decomposing while boiling at the higher temperatures. To be conservative, the lowest boiling component is reported as the boiling point of the sample

Description of key information

The first boiling point of Isophoronediamine-cresyl glycidyl ether adduct is 470°K (197°C). There is one boiling peak above this temperature. However, the sample may be decomposing while boiling at the higher temperatures. To be conservative, the lowest boiling component is reported as the boiling point of the sample.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
197 °C

Additional information