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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
06-12 February 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The study was conducted according to an internationally recognised method, and under GLP. Test substance is adequately characterised. Therefore full validation applies.
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2008
Deviations:
no
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. QA statement)
Remarks:
Inspected on 13 and 14 October 2014/ signed on 8 april 2015
Type of method:
capillary method
Key result
Melting / freezing pt.:
>= 51.9 - <= 59.1 °C
Decomposition:
no
Remarks on result:
other: pressure not specified but assumed to be ambiant

Findings:

Pre-test 1:

Attempt

Selected temperature*

Melting range in °C

1

80.0

56.0 – 77.0

* Capillary tube containing the test item was set into channel 2 of the instrument at 17.2 °C

 

The test item melted to a clear yellow sticky mass and solidified after cooling down as a clear yellow solid like, original test item.

To prove this melting range an additional attempt was performed.

Pre-test 2:

Attempt

Selected temperature*

Melting range in °C

2

50.0

52.1 – 61.2

Main test:

Determination

Selected temperature*

Melting range in °C

1

49.0

51.9 – 59.0

2

49.0

51.9 – 59.1

* Capillary tube containing the test item was set into channel 2 of the instrument

 

In both experiment the test item melted to a yellow clear sticky mass and solidified after cooling down as a clear yellow solid.

Result:

The means between both determinations give the following values for the melting range:

Melting range:                                             51.9 to 59.1 °C (325.1 K to 332.3 K)

Standard deviation:                                   0.00 (begin); 0.07 (end)

Estimated accuracy:                                   ± 0.1 °C

Conclusions:
The determination of the melting point of the test item was performed with the Melting Point meter MPM-HV2.
The test item showed a melting range, no melting point. As the test item is an UVCB substance this is considered as normal.
The melting range was detected with: 51.9 to 59.1 °C (325.1 K to 332.3 K).
Executive summary:

The study was performed in order to determine the freezing/melting point of test item according OECD 102, resp. EU A.1 guideline, using the capillary method.

The melting range was detected with: 51.9 to 59.1 °C (325.1 K to 332.3 K).

Description of key information

The melting range was detected with: 51.9 to 59.1 °C (325.1 K to 332.3 K).

Key value for chemical safety assessment

Additional information

A fully reliable experimental study, conducted according to OECD 102/ EU A1 guideline is available.

It is considered as a key study, and the result is retained as key data.