1,3,5-tris[3-(trimethoxysilyl)propyl]-1,3,5-triazine-2,4,6(1H,3H,5H)-trione

Boiling point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

2013-09-13

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

The study was conducted in accordance with a relevant test method and in compliance with a known quality system (ISO 9001:2008)

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

no

Other quality assurance:

other: ISO 9001:2008

Type of method:

dynamic method

Key result

Atm. press.:

1 013 hPa

Decomposition:

yes

Decomp. temp.:

216.7 - 274.8 °C

Remarks on result:

other: The colour of the test substance changes from slightly yellow to yellow-brown

Results:

Method 1: Dynamic method

Table 1: Results of Method 1 – Dynamic method

Test	Measured boiling temperature		Measured pressure (kPa)	Boiling temperature corrected to normal pressure
	°C	K		°C	K
1	273	546.2	97.2	274.9	548.1
2	215	488.2	97.2	216.7	489.9

Approximate accuracy of the instrument: ± 0.5 K (up to 600 K)

 

With method 1 (dynamic method) it was not possible to achieve a constant boiling temperature. When repeating the measurement the boiling temperature falls to finally 215°C. During this test the colour of the test substance changes from slightly yellow to yellow-brown.

Conclusions:

Decomposition temperature of 216.7 - 274.9°C was obtained for the substance using a relevant test method and in compliance with a known quality system. During the study colour of the test substance changes from slightly yellow to yellow-brown. The result is considered to be reliable.

Reference 2

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

2013-10-25

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

The study was conducted in accordance with a relevant test method and in compliance with a known quality system (ISO 9001:2008)

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

no

Other quality assurance:

other: ISO 9001:2008

Type of method:

photocell detection

Key result

Boiling pt.:

210 - 287 °C

Atm. press.:

1 013 hPa

Method 2: Capillary tube method

Visual observation:

- Begin of bubbling at about 208°C (1-2 bubbles / min)

- Constant bubbling at about 285°C (1 bubble / 5-1 0 s)

- Constant bubbling at about 292°C (1 bubble / 2-3 s)

- Instrument stops the measurement at 300°C (upper limit) without photocell detection

Atmospheric pressure: 96.9 kPa

Corrected temperature: 210 – 287°C (483 – 560 K) at 101.32 kPa

The temperatures were corrected to normal atmospheric pressure (101.32 kPa).

Conclusions:

A boiling range of 210-287°C at 1013 hPa was determined for the substance using a relevant test method and in compliance with a known quality system. The result is considered to be reliable.

Reference 3

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

2013-07-30 to 2013-10-24

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

The study was conducted in accordance with a relevant test method and in compliance with a known quality system (ISO 9001:2008)

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

no

Remarks:

ISO 9001:2008

Type of method:

differential thermal analysis

Remarks:

Differential Scanning Calorimetry (DSC) combined with thermogravimetrie (TGA)

Key result

Atm. press.:

97 kPa

Decomposition:

yes

Decomp. temp.:

210

Remarks on result:

other: A small mass loss of about 3% at 210°C was observed in a TGA thermogram. This was followed by a 78% mass loss with onset temperature of about 269°C

Method 3: DSC/TGA method

With exclusive application of the DSC method it was not possible to detect a boiling temperature (no endothermic peak). See enclosure 1 (attached DSC diagram).

The TGA-diagram shows a small loss of mass (ca. 3%) at about 210°C. At this temperature, a clear decline of the mass curve begins. This sharp decline had an onset temperature of about 269°C. At the end of the measurement (400°C) about 78 % of the test substance had evaporated. See enclosure 2 (attached TGA diagram).

Conclusions:

An onset decomposition temperature of about 208°C was obtained for the substance using a relevant test method and in compliance with a known quality system. The result is considered to be reliable.

Description of key information

Boiling temperature: The substance was observed to undergo thermal decomposition from about 210°C (EU Method A.2)

Additional information

The boiling point of the substance has been determined using three different methods (Haas 2013); 1) dynamic method, 2) capillary tube method / photocell detection method and 3) Differential Scanning Calorimetry (DSC) combined with thermogravimetric analysis (TGA) method in accordance with EU Test Method A.2 and in compliance with a known quality system (ISO 9001:2008).

In the dynamic method, it was not possible to obtain a constant boiling temperature for the substance but a decomposition temperature of 216.7 - 274.9°C at 1013 hPa was obtained. During the study, a colour change from slight yellow to yellow-brown was observed. To further evaluate the boiling point of the substance accurately, a capillary tube/photocell detection method was used. The results of visual observation indicate an onset of boiling temperature from about 210 - 287°C. Also, in the DSC/TGA method, onset of decomposition temperature was observed at about 208°C with initial mass loss of about 3%. This was followed by sharp decline with an onset temperature of about 269°C. At the end of the study (400°C), about 78% of the test substance has been lost.

Based on the findings in the above studies, the submission substance is considered to undergoes thermal decomposition from about 210°C. The results are considered to be reliable and are used as weight of evidence.

In available secondary sources to which reliability could not be assigned, boiling point values of 237 - 247°C at 35 hPa and >250°C at 0.13 hPa, 236°C were reported for the substance.