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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:
01 March 2010 – 25 March 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
thermal analysis
Remarks:
(differential scanning calorimetry)
Key result
Melting / freezing pt.:
197 °C
Atm. press.:
1 013.25 hPa
Decomposition:
yes
Remarks:
Reaction and/or decomposition was observed directly after melting
Decomp. temp.:
> 197 °C
Sublimation:
no
Melting / freezing pt.:
471 K
Conclusions:
The melting temperature of ammonium dihydrogenorthophosphate was determined to be 197°C using using differential scanning calorimetry (GLP-compliant study in accordance with EC A.1, OECD 102). The substance decomposes during melting.

Description of key information

The melting temperature of ammonium dihydrogenorthophosphate was determined to be 197°C using differential scanning calorimetry (EC A.1, OECD 102, GLP). The substance decomposes directly after melting.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
197 °C

Additional information