Pentaerythritol tetrabenzoate

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:

04.06.2018 - 03.07.2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

resp. EU A.1

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Name: Pentaerythritol tetrabenzoate
Appearance: off-white solid
Composition: Pentaerythritol tetrabenzoate >96%
CAS No.: 4196-86-5
EINECS-No.: 224-079-8
Molecular formula: C33H28O8
Molecular weight: 552.576 g/mol
Purity: >96%
Homogeneity: homogeneous
Expiry date: Nov. 2018
Storage: Room Temperature (20 ± 5°C)

Key result

Melting / freezing pt.:

> 103.48 - < 103.55 °C

Decomposition:

yes

Decomp. temp.:

ca. 375.51 °C

Sublimation:

no

Values DSC Test Item first determination

Melting Point Temperature [°C] 103.56 (Onset), energy [J/g] 55.98

Beginning of decomposition Temperature [°C] 375.51, energy [J/g] 15.6

Values DSC Test Item second determination

Melting Point Temperature [°C] 103.49 (Onset), energy [J/g] 56.93

Beginning of decomposition Temperature [°C] 377.54, energy [J/g] 15.6

The deviation of melting point between the first and second determination was < 0.5 K; therefore, no further determination needs to be performed.

Conclusions:

The melting point under these circumstances as the endothermic event is:
103.53 ± 0.05 °C (376.68 ± 0.05 K)
This value is the mean of two independent determinations. The beginning of decomposition should be stated with: 375.51 °C (648.66 K). This value is the lowest value of two independent determinations.

Executive summary:

The determination of the melting / boiling point was determined via DSC (differential scanning calorimetry). In both DSC measurements one endothermic event was detected. In accordance to the pre-test the first endothermic event can be identified as melting point, evaluated with the onset function.

In the further process a turbulent baseline was observed which probably supposed to be beginning of decomposition.

The melting point under these circumstances as the endothermic event should be stated with:

103.53 ± 0.05 °C (376.68 ± 0.05 K)

This value is the mean of two independent determinations. The beginning of decomposition should be stated with: 375.51 °C (648.66 K). This value is the lowest value of two independent determinations.

Description of key information

The determination of the melting / boiling point was determined via DSC (differential scanning calorimetry). In both DSC measurements one endothermic event was detected. In accordance to the pre-test the first endothermic event can be identified as melting point, evaluated with the onset function.

In the further process a turbulent baseline was observed which probably supposed to be beginning of decomposition.

The melting point under these circumstances as the endothermic event should be stated with:

103.53 ± 0.05 °C (376.68 ± 0.05 K)

This value is the mean of two independent determinations. The beginning of decomposition should be stated with: 375.51 °C (648.66 K). This value is the lowest value of two independent determinations

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

103.53 °C