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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:
2018
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)
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Melting / freezing pt.:
> 37.8 - < 40.6 °C
Melting / freezing pt.:
> 51.4 - < 65.4 °C

The test material appears to give a broad endotherm with more than one onset value, this could be due to the multi-component nature of the test material.

Table of Results:

 

Run B

Run C

Run D

 

Run E

Endotherm onset temp1. (°C)

37.77

40.60

38.77

38.04

Endotherm onset temp2. (°C)

65.54

57.26

60.84

51.42

Mass of Sample Used (g)

2.34

3.96

3.10

4.08

Start Temperature (°C)

0

0

0

0

Final Temperature (°C)

150

150

150

150

Scan Rate (K/min)

1

1

1

1

The melting point will be reported as the range of the onset values obtained for the leading edge and main peak endotherms:

Melting point 1 37.8 - 40.6°C

Melting point 2 51.4 - 65.4°C

Conclusions:
The melting point is reported as the range of the onset values obtained for the leading edge and main peak endotherms:
Melting point 1 37.8 - 40.6°C
Melting point 2 51.4 - 65.4°C
Executive summary:

The melting point of 1,1"-isopropylidenediferrocene was investigated using Differential Scanning Calorimetry (DSC), this study is assigned a reliability score of 1 in accordance with the criteria for assessing data quality set forth by Klimisch et al (1997).

The test material appears to give a broad endotherm with more than one onset value; the melting point is reported as the range of the onset values obtained for the leading edge and main peak endotherms:

Melting point 1 37.8 - 40.6°C

Melting point 2 51.4 - 65.4°C

Description of key information

The melting point of 1,1"-isopropylidenediferrocene was investigated using Differential Scanning Calorimetry (DSC). The test was conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A1 and OECD Test Guideline 102 and assigned a reliability score of 1 in accordance with the criteria for assessing data quality set forth by Klimisch et al (1997).

The test material ,1,1"-isopropylidenediferrocene appears to give a broad endotherm with more than one onset value; the melting point is reported as the range of the onset values obtained for the leading edge and main peak endotherms:

Melting point 1 37.8 - 40.6°C

Melting point 2 51.4 - 65.4°C

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
37.8 °C

Additional information

The melting point is reported as the range of the onset values obtained for the leading edge and main peak endotherms:

Melting point 1: 37.8 - 40.6°C

Melting point 2: 51.4 - 65.4°C