Registration Dossier
Registration Dossier
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EC number: 236-875-2 | CAS number: 13530-50-2
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 06 October 2009 - 23 November 2009
- 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
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
- Remarks:
- Differential scanning calorimetry (DSC)
- Melting / freezing pt.:
- > 450 °C
- Conclusions:
- The test material was determined to have a melting temperature greater than 450°C (723 K). The test material underwent dehydration from approximately 421 K, but these thermal events were not associated with a phase transition (i.e. melting) of the test material.
- Executive summary:
- The test material was determined to have a melting temperature greater than 450°C (723 K), by differential scanning caloritry, using ASTM E537-86, Method A1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008. Although the test material was identified as undergoing dehydration from approximately 421 K; these thermal events were not associated with a phase transition (i.e. melting) of the test material.
Reference
Thermographic data and thermograms are shown in the attachment - Thermograms
Thermographic Data for the definitive tests are shown in the following tables:
Determination 1– Heating Step 1
Thermal Event |
Interpretation |
Temperature |
|
ºC |
K |
||
Endotherm onset temperature |
Onset of dehydration of the sample |
148.03 |
421 |
Endotherm onset temperature |
Continuation of dehydration |
231.94 |
505 |
Determination 2 – Heating Step 1
Thermal Event |
Interpretation |
Temperature |
|
ºC |
K |
||
Endotherm onset temperature |
Onset of dehydration of the sample |
149.71 |
423 |
Endotherm onset temperature |
Continuation of dehydration |
231.72 |
505 |
Overall result: Melting temperature greater than 450°C (>723 K). The test material underwent dehydration from approximately 421 K, but these thermal events were not associated with a phase transition (i.e. melting) of the test material.
Description of key information
Melting point: > 450 °C (EU Method A.1, GLP)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 450 °C
Additional information
The melting/freezing temperature of aluminium tris(dihydrogen phosphate) was determined by differential scanning calorimetry (DSC) in a study conducted according to EU Method A.1 and GLP (O'Conner & Woolley, 2010). The melting point of the test material was determined to be greater than 450 °C (723 K).
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