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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 271-678-5 | CAS number: 68603-87-2
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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- , Nr. 440/2008 A1, A2
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM E 537-76
- Deviations:
- not specified
- GLP compliance:
- no
- Type of method:
- thermal analysis
- Remarks:
- Differential Scanning Calorimetry
- Melting / freezing pt.:
- > 45 - < 120 °C
- Atm. press.:
- 1 013 hPa
- Conclusions:
- The range of melting point of DIACIDES AGS is from > 45°C to 120°C.
- Executive summary:
The range of melting point of DIACIDES AGS is from > 45°C to 120°C. The proportional composition of the test substance is as follows: 51.6% glutaric acid (CAS Nr. 110-94-1), 23.5% adipic acid (CAS Nr. 124-04-9), 16.6% succinic acid (CAS Nr. 110-15-6). (Rhodia, 2008)
Reference
Standardization:
-with indium (99% purity Mettler) standard
-results: Tonseta=156.52°C,
-conclusion: as experimental Tonset is comprised between 156.3°C and 156.9°c which are the validation criteria, the test is validated.
a Tonset is the conventional temperature of fusion corresponding to the intersection of the line of greatest slope of the phenomenon with the extrapolated baseline.
Experimental sample conditions:
-crucible used: aluminium
-Mass of test item: 9 -11 mg
-Temperature program:
Ramp heating phase 1: from 100°C to 140°C at 2°C/min, Ramp cooling: from 140°C to -50°C at 10°C/min,
Ramp heating phase 2: from -50°C to 140°C at 2°C/min
-Gas used: Nitrogen, 50 mL/min
Interpretation:
The thermograms shows followed profile:
-Heating ramp 1: a complex profile of melting endotherm appears from 45°C and streches out to 120°C
-Cooling ramp: a complex crystallization phenomenon occurs from 90°C
-Heating ramp 2: the reversibility of the fusion is shown
Conclusion:
As it is quite difficult to measure Tonset (multi constituent substance), a range of melting point is given.
Description of key information
The range of melting point of DIACIDES AGS is from > 45°C to 120°C. The proportional composition of the test substance is as follows: 51.6% glutaric acid (CAS Nr. 110-94-1), 23.5% adipic acid (CAS Nr. 124-04-9), 16.6% succinic acid (CAS Nr. 110-15-6). (Rhodia, 2008)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 45 °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.
