Registration Dossier
Registration Dossier
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EC number: 246-430-4 | CAS number: 24720-09-0
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:
- June 16, 2004
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- The study was conducted according to OECD/EU guideline, and under GLP. No deviation was reported. The substance is adequately characterised. Therefore full validation applies.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- Directive 92/69/EEC (which constitutes Annex V of Directive 67/548/EEC)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: Method for the Determination of Crystallizing Point (BS4633)
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Swiss GLP compliance programme (inspected on September 09 and 30, 2002/ signed on December 2002)
- Type of method:
- method to determine freezing temperature
- Specific details on test material used for the study:
- Storage condition of test material: Refrigerator (between 0 and 10 °C under nitrogen)
- Key result
- Melting / freezing pt.:
- 4 °C
- Executive summary:
The freezing point of the test substance was determined according to OECD 102/EU A1 guideline using BS4633 method for the determination of crystallizing point.
The determination was carried out in duplicate, and the mean final temperature was retained.
The freezing temperature of test substance has been determined to be 4 °C (277 K), with initiation.
Reference
The test material remained unchanged until 265 K, then a crystal of test material was added to the supercooled liquid to initiate the crystallization and the test tube was removed from the cold bath and allowed to warm at room temperature.
Determination 1: 277 K
Determination 2: 277 K
accuracy ± 0.5 °C; 277 ± 0.5 K
Description of key information
Freezing point = 4°C with initiation; no freezing observed down to -6°C without initiation.
The substance can be stable in supercooling conditions.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 4 °C
Additional information
A fully reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. It is considered as a key study, and the result is retained as key value for purpose of CSA.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
