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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 274-798-6 | CAS number: 70714-66-8
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:
- Testing was conducted between 31 March 2010 and 24 August 2010.
- 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
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 723 K
- Decomposition:
- yes
- Remarks:
- Test item gradually decomposed upon heating
- Sublimation:
- no
- Remarks on result:
- other: No atmospheric pressure was recorded for this endpoint.
- Conclusions:
- The melting/freezing temperature of the test item has been determined to be not less than 450°C (723K). The test item was determined to gradually decompose upon heating.
- Executive summary:
Two physico-chemical properties of the test item have been determined.
Methods employed are designed to be compatible with those specified in Commission Regulation (EC) No 440/2008 of 30 May 2008, Part A: Methods for the determination of physico-chemical properties.
Method
The determination was carried out by differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86 designed to be compatible with Method A1 Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008.
Conclusion
The melting/freezing temperature of the test item has been determined to be not less than 450°C (723K). The test item was determined to gradually decompose upon heating.
Reference
Please see Attachment 1 for Results.
Description of key information
Melting point: The acid form [DTPMP-H] was observed to have a melting/freezing temperature of >450°C (723 K) and to gradually decompose when heated (Tremain 2010). This conclusion is read across to the salt to indicate that DTPMP-xNH4 will also undergo decomposition when heated.
Key value for chemical safety assessment
Additional information
The melting point of the anhydrous form of the parent acid (DTPMP-H) was determined using differential scanning calorimetry (DSC) in accordance with EU Method A.1 test method. DTPMP-H (anhydrous form) was observed to have a melting/freezing temperature of >450°C (723 K) and undergo gradual decomposition when heated.
This result is read-across to the salt, DTPMP-xNH4; that the salt will have a higher melting point than the parent acid and also undergoes thermal decomposition when heated. Salts would be expected to melt at a higher temperature than the parent acid, and to decompose on heating.
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.
