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EC number: 241-047-9 | CAS number: 16970-55-1
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)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- -70.7 °C
- Conclusions:
- Dihydrogen tetrachloropalladate has a mean melting point of -70.7°C.
- Executive summary:
Nau (2017) is a GLP-compliant study following OECD guideline 102 and EU method A1. It is considered suitable for use as the key study for this endpoint. Dihydrogen tetrachloropalladate has a mean melting point of -70.7°C.
Reference
In the open crucibles, the measurement showed an endothermal effect in the temperature range of -75 to -40°C (during heating up). The onset temperature was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.After the DSC measurement in open glass crucibles, a mass loss of approximately 40 % was detected. This was probably due to evaporation of water (aqueous solution).
In the closed crucibles, the measurement showed an endothermal effect in the temperature range of -75 to -40°C (during heating up). No other endothermal or exothermal effect was observed up to the final temperature. The onset temperature of the endothermal effect was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.
Table1: Melting point (DSC measurements)
Ident No. |
Test item / mg |
Starting temperature / °C |
Final test temperature / °C |
Temperature range (endo-thermal) / °C |
Onset (melting) / °C |
Crucible |
Observations after the measurement |
36238 |
29.81 |
-100 |
25 |
-75 to -40 |
-70.8 |
glass, open |
Test item seemed unchanged; mass loss: 41 % |
36240 |
31.84 |
-100 |
25 |
-75 to -40 |
-70.4 |
glass, open |
Test item seemed unchanged; mass loss: 37 % |
36245 |
23.42 |
-100 |
25 |
-75 to -40 |
-71.0 |
glass, closed |
Test item seemed unchanged |
Description of key information
Dihydrogen tetrachloropalladate has a mean melting point of -70.7°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -70.7 °C
Additional information
Nau (2017) is a GLP-compliant study following OECD guideline 102 and EU method A1. It is considered suitable for use as the key study for this endpoint. Dihydrogen tetrachloropalladate has a mean melting point of -70.7°C.
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