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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Qualifier:
according to guideline
Guideline:
other: ASTM E 537-76
Principles of method if other than guideline:
method cited as CE n°440/2008 part A1 and part A2
GLP compliance:
not specified
Type of method:
thermal analysis
Melting / freezing pt.:
150.85 °C

Standardisation with indium (99.99% purity Mettler) standard

Results: T(onset)a = 156.52°C H = 28.54 J/g

Conclusion: as experimental T(onset) is comprised between 156.3°C and 156.9°C which are the validation criteria, the test is validated.

Experimental sample conditions:

- Crucible used : aluminium

- Mass of test item : 6 -7 mg

Temperature program:

- Ramp heating phase 1 : from 50°C to 165°C at 2°C/min

- Ramp cooling: from 765°C to 0°C at 10°C/min

- Ramp heating phase 2: from 0°C to 165°C at 2°C/min

- Gas used : Nitrogen, 50 mL/min

Executive summary:

The melting point of adipic acid is 150.85°C, measured according to EU Method A.1 (Melting / Freezing Temperature) (Rhodia, 2008).

Description of key information

The melting point of adipic acid is 150.85°C, measured according to EU Method A.1 (Melting / Freezing Temperature) (Rhodia, 2008).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
150.85 °C

Additional information

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