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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:
25.09.2008 to 09.03.2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Version / remarks:
(1995)
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Boiling pt.:
> 250 °C
Atm. press.:
1 013 hPa

The boiling point of MDEA-Esterquat (Rewoquat V 10057) was investigated in a study conducted according to OECD Guideline 103 (Boiling point/boiling range; 1995) and EU Method A.2 (Boiling Temperature; 2008).

In a preliminary test using a thermogravimetric analyzer, 2.54 mg test substance were heated from 25°C to 419°C with a rate of 20°C/min. from approximately 300°C upwards the weight of the sample decreased significantly (at 386°C ca. 25%). After the experiment, the sample was cooled to 50°C. A yellow/brown coloured molten deposit remained in the sample container; this indicates that a reaction and/or decomposition had occurred.

The main study consisted of three individual experiments (all experiments were conducted at atmospheric pressure under a flow of nitrogen)

-in the first experiment 4.84 mg test substance were heated from 25°C to 385°C: endothermic peaks in the range 25°C and 100°C and in the range 150°C and 250°C were observed. After the experiment, a yellow molten residue remained in the sample container.

-in the second experiment, 1.86 mg test substance were heated from -25°C to 200°C. During the initial cooling period (25 to -25°C) no effects were observed. After heating to 100°C, an endothermic peak was observed between 25°C and 100°C. The extrapolated onset temperature of this peak was 54°C. Between 125°C and 200°C a second endothermic effect was observed. After the experiment a white molten residue remained in the sample container.

-in the third experiment, 3.67 mg test substance were cooled from 25°C to -25°C and then heated to 100°C and subsequently to 250°C. During the cooling period no effects were observed. After heating, two endothermic peaks were observed (ranges: 25°C-100°C and 150°C -200°C).

The first peak was attributed to the melting point (extrapolated onset temperature: 54°C).

In this third experiment, compared to the first and second experiment, the peak apex had shifted to lower temperature which confirms that the observed effect was due to reaction and/or decomposition of the test substance and not due to boiling. In conclusion a boiling could not be determined up to a temperature of 250°C.

Conclusions:
The boiling point of MDEA-Esterquat C16-18 and C18 unsatd. was investigated in a study conducted according to OECD Guideline 103 (Boiling point/boiling range; 1995) and EU Method A.2 (Boiling Temperature; 2008). Based on the results of the differential scanning calorimetry a boiling point could not be determined up to a temperature of 250°C at 1013 hPa.
Executive summary:

The boiling point of MDEA-Esterquat C16-18 and C18 unsatd. was investigated in a study conducted according to OECD Guideline 103 (Boiling point/boiling range; 1995) and EU Method A.2 (Boiling Temperature; 2008). Based on the results of the differential scanning calorimetry a boiling point could not be determined up to a temperature of 250°C at 1013 hPa.

Description of key information

>250°C at 1013 hPa

Key value for chemical safety assessment

Additional information

The boiling point of MDEA-Esterquat C16-18 and C18 unsatd. could not be determined up to a temperature of 250°C at 1013 hPa in a study conducted according to OECD Guideline 103 (Boiling point/boiling range; 1995) and EU Method A.2 (Boiling Temperature; 2008).