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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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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:
from 2018-03-22 to 2018-03-22
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:
27 July 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
31 May 2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
March 1998
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Remarks:
and capillary method
Key result
Decomposition:
yes
Decomp. temp.:
124 °C
Remarks on result:
other: the test item decomposed starting at approximately 124 °C; no reactions of melting/boiling reactions were recorded

DSC test:

At the start of the experiment, the substance appeared as brownish paste; at the end of the experiment the substance appeared as dark brown paste. Initial weight of the test item was 2.0 and 1.5 mg and after analysis residue was found to be 1.6 and 1.0 mg, respectively.

An exothermic reaction occurred at ca. 124 °C, which can be associated to decomposition of the substance.

Table: Appearance and weight of the test item during DSC analysis

Replication No.

Appearance of the Test Item at the start

Initial Weight of the Test Item, (mg)

Residue
(mg (%))

Appearance of the Test Item at the end

R1

Brownish paste

2.0

1.6

Dark brown paste

R2

Brownish paste

1.5

1.0

Dark brown paste
Conclusions:
Based on the study results, it is concluded that the test item undergoes decomposition starting at approximately 124 °C. No reactions of melting/boiling reaction attributable to the test item were recorded.
Executive summary:

A study was conducted according to OECD guideline 102, EU Method A.1 and OPPTS 830.7200 to determine the melting point of the test item. The melting point of the test item was determined using the differential scanning calorimetry. 2.0 and 1.5 mg of the test item, respectively, was weighed into a crucible and it was closed. The prepared crucible was inserted in the DSC and heated from room temperature to 500 °C at a constant heating rate of 10 K/min. In result, the test item decomposed starting at approximately 124 °C. No reactions of melting/boiling reactions were recorded.

Description of key information

In a study according to OECD guideline 102, EU Method A.1 and OPPTS 830.7200 the test item decomposed starting at approximately 124 °C. No reactions of melting/boiling reaction attributable to the test item were recorded.

Key value for chemical safety assessment

Additional information

A study was conducted according to OECD guideline 102, EU Method A.1 and OPPTS 830.7200 to determine the melting point of the test item. The melting point of the test item was determined using the differential scanning calorimetry. 2.0 and 1.5 mg of the test item, respectively, was weighed into a crucible and it was closed. The prepared crucible was inserted in the DSC and heated from room temperature to 500 °C at a constant heating rate of 10 K/min. In result, the test item decomposed starting at approximately 124 °C. No reactions of melting/boiling reactions were recorded.