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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2 February 2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was performed according to an industry accepted guideline
Qualifier:
according to guideline
Guideline:
other: ASTM E2550-07 Standard Test Method for Thermal Stability by Thermogravimetry
Deviations:
no
GLP compliance:
no
Remarks:
The company is ISO 9001/2000 certified which requires regularaudits to demonstrate ability to provide products meeting customer & regulatory requirements including documentation of analytical procedures, maintenance & calibration of equipment.
Type of method:
other: Thermogravimetric analysis
Decomposition:
yes
Decomp. temp.:
209 °C
Remarks on result:
other: 58.8 % of test material
Decomposition:
yes
Decomp. temp.:
250 °C
Remarks on result:
other: 19.9 % of test material
Decomposition:
yes
Decomp. temp.:
529 °C
Remarks on result:
other: 11.9% of test material

TGA data show there were three main thermal events resulting in weight loss associated with sample decomposition. Derivative peaks at 209 0C, 250 0C and 529 0C accounted for a weight loss of 91.5%. The overall onset of sample weight loss occurred at approx. 198 C.

A TGA thermograph is attached as Figure 1

Table 1: Results of TGA Analysis

Derivative Peak (oC)

% Weight Loss

209

58.8

250

19.8

529

11.9

Residue at 700oC

9.5

Conclusions:
Analysis by TGA indicates the test substance decomposes before boiling. The test material’s weight loss associated with decomposition occurred at temperatures of 209, 250 and 529 C. The onset of decomposition occurred at 198 C.
Executive summary:

A thermogravimetric analysis performed according to the ASTM E2550 -07 guideline indicates the test substance decomposes before boiling.

The test material was heated under nitrogen up to 700 oC. Examination of the TGA curve showed test material weight loss associated with decomposition. The onset of weight loss occurred at approx. 198 oC. There were three main thermal events at derivative peak values of 209, 250 and 529 oC corresponding to weight loss values of approximately 58.8, 19.8 and 11.9 %, respectively. A residue remained at 700 oC equivalent to 9.5 % of the test material.

Description of key information

Analysis by TGA indicates the test substance decomposes before boiling.  The test material’s weight loss associated with decomposition occurred at temperatures  of 209, 250 and  529 C. The onset of decomposition occurred at 198 C (ASTM E2550 -07).

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
198 °C

Additional information

A thermogravimetric analysis performed according to the ASTM E2550 -07 guideline indicates the test substance decomposes before boiling. The test material was heated under nitrogen up to 700 °C. Examination of the TGA curve showed test material weight loss associated with decomposition.The onset of weight loss occurred at approx. 198 °C. There were three main thermal events at derivative peak values of 209, 250 and 529 °C corresponding to weight loss values of approximately 58.8, 19.8 and 11.9 %, respectively. A residue remained at 700oC equivalent to 9.5 % of the test material.