Registration Dossier

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing 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 102 (Melting point / Melting Range)
Version / remarks:
(1995)
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
(2008)
GLP compliance:
yes (incl. QA statement)
Type of method:
thermal analysis
Remarks:
differential scanning calorimetry
Melting / freezing pt.:
54 °C
Atm. press.:
1 013 hPa
Decomposition:
no

The melting point of MDEA-Esterquat (Rewoquat V 10057) was investigated in a study conducted according to OECD Guideline 102 (Melting point / Melting Range; 1995) and EU Method A.1 (Melting / Freezing 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 corresponds 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.

Conclusions:
The melting point of MDEA-Esterquat C16-18 and C18 unsatd. was investigated in a study conducted according to OECD Guideline 102 (Melting point / Melting Range; 1995) and EU Method A.1 (Melting / Freezing Temperature; 2008). The melting point was determined to be 54°C at atmospheric pressure.
Executive summary:

The melting point of MDEA-Esterquat C16-18 and C18 unsatd. was investigated in a study conducted according to OECD Guideline 102 (Melting point / Melting Range; 1995) and EU Method A.1 (Melting / Freezing Temperature; 2008). The melting point was determined to be 54°C at atmospheric pressure.

Description of key information

54°C at atmospheric pressure

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
327.15 K

Additional information

The melting point of MDEA-Esterquat C16-18 and C18 unsatd. was investigated in a study conducted according to OECD Guideline 102 (Melting point / Melting Range; 1995) and EU Method A.1 (Melting / Freezing Temperature; 2008).