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Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Reference:
Composition 0
Qualifier:
no guideline followed
GLP compliance:
no
Test material information:
Composition 1
Key result
Melting / freezing pt.:
20 - 35 °C
Conclusions:
The melting point of MTDID 15670 is 20 - 35 °C.
Executive summary:

The melting point of MTDID 15670 is 20 - 35 °C. Only the result was reported on the MSDS and no information about the pressure or method used was provided; therefore the reliability of the data is not assignable.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Reference:
Composition 0
Qualifier:
no guideline followed
GLP compliance:
no
Test material information:
Composition 1
Key result
Melting / freezing pt.:
20 - 35 °C
Conclusions:
The melting point of MTDID 15670 is 20 - 35 °C.
Executive summary:

The melting point of MTDID 15670 is 20 - 35 °C. Only the result was available in the report and no information about the pressure or method used was provided; therefore the reliability of the data is not assignable.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24 Jun - 22 Aug 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: 605803
- Physical state: White waxy solid
- Analytical purity: 98.4%
- Expiration date of the lot/batch: 31 December 2016

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: at room temperature
Key result
Melting / freezing pt.:
24 °C
Decomposition:
no

The DSC-curves obtained during the two experiments are included in attachments. During the cooling in the first experiment, an exothermic peak between -30 °C and 15 °C was observed. The effect was obtained due to crystallization of the test item. During heating two endothermic peaks between -25 °C and 50 °C were observed. A first broad peak followed by a sharp second peak. The peak maximum of the first peak was 24.68 °C and its extrapolated onset temperature was 9.08°C. The peak maximum of the second peak was 35.99°C. It was assumed that the first peak was due to melting of the test item. The source of the second effect was unknown.

In order to investigate the peaks between -25 °C and 50 °C, a repeated heating cycle was applied in the second experiment. With the first heating, the peak maximum of the first peak was 23.92 °C and its extrapolated onset temperature was 9.29 °C. The peak maximum of the second peak was 35.23 °C. With the second heating, the first peak had a maximum of 24.07 °C and an extrapolated onset temperature was 18.68 °C. The second peak had a maximum of 33.08 °C.

Conclusions:
The melting point of MTDID 15670 was determined to be 24 °C by the EU Method A.1.
Executive summary:

The melting point of MTDID 15670 was tested using differential scanning calorimetry (DSC). The melting temperature was determined to be 24 °C. The study was conducted in accordance with EU Method A.1 and was GLP compliant; therefore the study is considered reliable without restrictions.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Reference:
Composition 0
Qualifier:
no guideline followed
GLP compliance:
no
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Specific details on test material used for the study:
Lot# 649867 and lot# 605803
Key result
Melting / freezing pt.:
>= 27.34 - <= 32.81 °C
Remarks on result:
other: Results are available using two different samples of MTDID 15670. The reported range represents the results from the two tests.
Conclusions:
The melting point of MTDID 15670 was determined to be 27.34 - 32.81 °C using differential scanning calorimetry (DSC) to analyze two samples.
Executive summary:

The melting point of MTDID 15670 was determined to be 27.34 - 32.81 °C using differential scanning calorimetry (DSC) to analyze two samples. The study did not follow guideline protocol nor were the details of the study reported; therefore the reliability of the data is not assignable.

Description of key information

The melting point of MTDID 15670 was determined to be 24 °C by the EU Method A.1.

Key value for chemical safety assessment

Additional information

The melting point of MTDID 15670 was tested using differential scanning calorimetry (DSC). The melting temperature was determined to be 24 °C. The study was conducted in accordance with EU Method A.1 and was GLP compliant; therefore the study is considered reliable without restrictions. In a supporting study, the melting point of MTDID 15670 was determined to be 27.34 - 32.81 °C using differential scanning calorimetry (DSC) to analyze two samples. The study did not follow guideline protocol nor were the details of the study reported; therefore the reliability of the data is not assignable. Two additional supporting studies reported melting point ranges of 20 -35 °C. The reports only included the result and no information about the pressure of method used were provided; therefore the reliability of the data is not assignable.