1,1''-isopropylidenediferrocene

Melting point / freezing point

Link to relevant study record(s)

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

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

GLP compliance:

yes

Type of method:

differential scanning calorimetry

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