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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:
2018-01-05 to 2018-02-15
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
CAS No.: 17696-62-7
Batch: 018964K19K
Expiry date: 02 August 2018
Purity: 99.1%
Appearance: White powder
Storage: In darkness at room temperature
Key result
Melting / freezing pt.:
170.1 °C
Remarks on result:
other: The melting point was investigated under atmospheric pressure.

Two assays were perfomred during the test.

Assay No. 1:

- Gas used: Nitrogen

- Ventilation: Yes

- Crucible used: Aluminium, 120 µl, with lid

- Mass of test item: 11.99 mg

- Program Phase 1: Isotherm at 25 °C for 5 minutes, heating phase from 25 °C to 600 °C at 10 °C/min

The melting point of the test item for this assay was 169.8 °C. The test item became a black carbonised solid after the end of the assay. It remained 6.15 mg in the crucible (corresponding to 51.3% of the initial mass).

Assay No. 2:

- Gas used: Nitrogen

- Ventilation: Yes

- Crucible used: Aluminium, 120 µl, with lid

- Mass of test item: 9.90 mg

- Program Phase 1: Isotherm at 25 °C for 5 minutes, heating phase from 25 °C to 250 °C at 10 °C/min

An orange residue was observed after the end of the assay. It remained 9.56 mg in the crucible (corresponding to 96.6% of the initial mass).

Conclusions:
The mean melting point of the test item phenyl 4 -hydroxybenzoate was 170.1 °C ± 0.5 °C.
Executive summary:

The mean melting point of the test item phenyl 4 -hydroxybenzoate determined by differential scanning calorimetry according to OECD guideline 102 was 170.1 °C ± 0.5 °C.

Description of key information

The mean melting point of the test item phenyl 4 -hydroxybenzoate determined by differential scanning calorimetry according to OECD guideline 102 was 170.1 °C ± 0.5 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
170.1 °C

Additional information