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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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:
January 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: ASTM E537-07, Standard test method for the thermal stability of chemicals by Differential Scanning Calorimetry, 2007
Deviations:
no
GLP compliance:
no
Other quality assurance:
other: ISO 9001-2015
Type of method:
other: Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analysis (TGA)
Key result
Decomposition:
yes
Decomp. temp.:
> 125 °C

Results

Calibration check

Measured values for Indium:

- Onset temperature: 156.7°C

- Enthalpy of melting: 29.0 J/g

The measured values are within the acceptance limits

Since the enthalpy of the endotherm was low (51 J/g) and the peak was broad, this could indicate decomposition of the material, instead of melting. Therefore a TGA measurement was performed. Test substance starts to decompose above 125°C (99.4% weight loss from 125°C → 310°C). For detailed graphs of DSC and TGA, kindly refer the attached baclground material section of the IUCLID.

Conclusions:
Under the study conditions, the melting point could not be determined due to decomposition of the test substance.
Executive summary:

A study was conducted to determine the melting point of the test substance, TMAC SC (88.3% active), using thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC), according to OECD Guideline 102, in compliance with ISO 9001:2015. Since the enthalpy of the endotherm was low (51 J/g) and the peak was broad, this could indicate decomposition of the material, instead of melting. Therefore a TGA measurement was performed. Test substance started to decompose above 125°C (99.4% weight loss from 125°C → 310°C). Under the study conditions, the melting point could not be determined due to decomposition of the test substance (Post, 2018).

Description of key information

The melting point of the test substance was determined using the differential scanning calorimetry (DSC) as well as thermal gravimetric methods, according to OECD Guideline 102 (Post, 2018). No melting point could be determined due to decomposition above 125°C.

Key value for chemical safety assessment

Additional information

The relative density of the substance is determined to be 0.899.