Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 210-288-1 | CAS number: 611-99-4
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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Remarks:
- DSC 8500, Perkin Elmer with one-way aluminium crucibles with perforated lid. Usage and calibration following to the corresponding SOP 11400296 in the current edition
- Specific details on test material used for the study:
- Name 4,4-Dihydroxybenzophenone
Batch no. 20111104
Composition 4,4-Dihydroxybenzophenone
CAS No. 611-99-4
Purity ≥ 99.5% purity - Key result
- Melting / freezing pt.:
- >= 214.34 - <= 228.58 °C
- Conclusions:
- The melting point of 4,4'-dihydroxybenzophenone was determined by DSC and found to cover the range 214.34 °C (487.49 K) to 228.58 °C (501.73 K).
The reason for a range is not fully understood but may indicate two species. The main peak was at 220.7°C and 220.5°C for the two runs and the second smaller peak was at 224.3°C and 224.6°C for the two runs. The average value is calculated to be 222.5°C.
Reference
In all performed runs one event with two peaks was detected. The event is an endotherm and can be identified as melting range according to the pre-test.The two peaks may indicate two main components which melt at different temperatures
Description of key information
The melting point of 4,4'-dihydroxybenzophenone was determined by DSC and found to cover the range 214.34 °C (487.49 K) to 228.58 °C (501.73 K).
The reason for a range is not fully understood but may indicate two species. The main peak was at 220.7°C and 220.5°C for the two runs and the second smaller peak was at 224.3°C and 224.6°C for the two runs. The average value is calculated to be 222.5°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 222.5 °C
Additional information
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.
