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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 951-963-7 | 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:
- 02 Dec 2019 - 05 Dec 2019
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
- Specific details on test material used for the study:
- Name Sulphide Precipitate
Batch no. 20190601
Appearance blackish-green, wet sticky solid
Composition 2.9 % Cu; 18.0 % Zn; 0.5 % Fe; 0.1 % Pb; 0.7 % Cd; 0.4 % As; 0.3 % Sb; 0.1 % Sn; 0.0 % Bi; 0.0 % Br; 2.7 % Cl; 1.1 % F
CAS No. unknown
EC-No. 951-963-7
Molecular formula not stated
Molecular weight not stated
Purity 100 % (UVCB)
Homogeneity homogeneous
Vapour pressure not stated
Stability in solvents H2O: not stated; EtOH: not stated; acetone: not stated; CH3CN: not stated; DMSO: not stated
Solubility in solvents H2O: not stated; EtOH: not stated; acetone: not stated; CH3CN: not stated; DMSO: not stated
Production date not stated
Expiry date 31. Dec. 2025
Storage room temperature (20 ± 5 °C)
Stability stable under storage conditions - Key result
- Melting / freezing pt.:
- > 400 °C
- Atm. press.:
- 1 atm
- Conclusions:
- The melting point of the test item cannot be found and/or determined under these test circumstances up to 400 °C.
- Executive summary:
The determination of the melting point ofSulphide Precipitatewas performedvia DSC (differential scanning calorimetry).
Three DSC measurements were performed. In all measurements only events of the water fraction were detected.
In the pre-test the test item was solid like ice at -19.5 °C and in the pre-test with heating; the test item was not liquefied.
Since the test item is a UVCB substance and contains metals that have higher melting points, the melting point of the test item cannot be found and/or determined under these test circumstances up to 400 °C.
No observations were made which might cause doubts on the validity of the study outcome. Therefore, the result of the study is considered valid.
Reference
Mass test item |
Mass crucible (before measurement): |
Mass crucible (after measurement): |
Observations |
|
First Measurement |
2.30 mg |
35.02 mg |
33.53 mg |
The crucible was bloated after measurement |
Second Measurement
|
2.25 mg |
34.67 mg |
33.34 mg |
The crucible was Visually unchanged after measurement |
Third Measurement
|
2.34 mg |
35.07 mg |
33.69 mg |
The crucible was bloated after measurement |
Three DSC measurements were performed.
In the cooling phase a sharp peak of exothermic event was detected. According to the pre-test, this can be identified as the freezing point of the water content, since the test item contains water.
In the heating phase a flat wide endothermic event in the range of -18,56 ° to 4,90 °C and an endothermic behaviour at approx. 100 °C was detected. After 200 °C no event was to be seen any more.
The endothermic event can be assigned to the melting point of the water fraction and the endothermic behaviour should be identified as evaporation of the water fraction.
In the pre-test with heating, the test item was not liquefied.
Description of key information
The melting point of the substance is > 400 deg C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 400 °C
Additional information
The determination of the melting point ofSulphide Precipitatewas performedvia DSC (differential scanning calorimetry).
Three DSC measurements were performed. In all measurements only events of the water fraction were detected.
In the pre-test the test item was solid like ice at -19.5 °C and in the pre-test with heating; the test item was not liquefied.
Since the test item is a UVCB substance and contains metals that have higher melting points, the melting point of the test item cannot be found and/or determined under these test circumstances up to 400 °C.
No observations were made which might cause doubts on the validity of the study outcome. Therefore, the result of the study is considered valid.
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.
