Registration Dossier
Registration Dossier
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EC number: 701-266-7 | CAS number: -
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 - 12 Apr 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 18 march 2002
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 27th July 1995
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- < -70 °C
- Atm. press.:
- 101 325 Pa
- Conclusions:
- The freezing point of the substance is below -70 °C.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 04 - 12 Feb 2010
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 27th July 1995
- Deviations:
- yes
- Remarks:
- Only one temperature: -25 °C
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 18 march 2002
- Deviations:
- yes
- Remarks:
- Heating was omitted
- Principles of method if other than guideline:
- Deviations from guideline:
The sample is a fluid at +20°C, so heating can be omitted
From literature it can be assumed, that the freezing point is under -20°C.
For REACH the freezing point only has to be determined till a lower limit of -20°C,so: A pour point analysis is performed at only one temperature: -25 °C
The measure to avoid super cooling was adding a few anti bumping granules.
The deviations will not lead to a different conclusion, only simplify the method - GLP compliance:
- no
- Type of method:
- pour point
- Melting / freezing pt.:
- < -20 °C
- Atm. press.:
- 101 325 Pa
- Conclusions:
- The freezing point of the substance is below -20 °C.
Referenceopen allclose all
Data below -70 °C are unreliable, as there is an effect of switching between the isothermal and heating stages. Similar effects as the ‘peak’ at -72 °C are observed, no matter what material or starting temperature. No melting, crystallization or glass transition can be assigned.
After one week at below -25 °C the surface of the substance moves, the substance is still fluid. A small rise in temperature may have occurred by removing the tubes from the freezer, but it is save to conclude the freezing point is below -20 °C for this substance.
Description of key information
The freezing point of the substance is below -70 °C.
Key value for chemical safety assessment
Additional information
Hantink-de Rooij E.E., 2010, Determination of freezing point of Pentaethylenehexamine PEHA, Research, Development & Innovation AkzoNobel Arnhem, The Netherlands.
The pour point is below -20 °C.
Hantink-de Rooij E.E., 2010, Determination of freezing point of Pentaethylenehexamine PEHA with DSC, Research, Development & Innovation AkzoNobel Arnhem, The Netherlands.
Below -70 °C no melting, crystallization or glass transition can be assigned at a scan rate 1 °C/min..
Both reports: Fair report, According to OECD guideline 102.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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