Registration Dossier
Registration Dossier
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EC number: 241-007-0 | CAS number: 16940-92-4
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:
- other: GLP compliant, guideline study, available as unpublished report, acceptable without restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM E537-86, designed to be compatible with Method A1 Melting/Freezing Temperature of Commission Regulation(EC) No 440/2008 and Method 102 of OECD Guidelines for Testing of Chemical
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- other: Differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86
- Melting / freezing pt.:
- ca. 325 °C
- Decomposition:
- yes
- Decomp. temp.:
- ca. 60 °C
- Remarks on result:
- other: decomposed from approximately 60°C (333K), with signs of partial melting of the decomposition product from approximately 325°C (598K)
- Conclusions:
- Diammonium hexachloroiridate decomposed from approximately 60°C with signs of partial melting of the decomposition product from approximately 325°C.
- Executive summary:
Melting point was determined in a GLP-compliant study using differential scanning calorimetry, using ASTM E537-86 and designed to be compatible with EU method A1 and OECD guideline 102 (Harlan 2011). Diammonium hexachloroiridate decomposed from approximately 60°C with signs of partial melting of the decomposition product from approximately 325°C.
Reference
Authors state as a result of the low rate of enthalpy change during (initial) decomposition, the onset temperature can only be approximated. Similar thermographic profiles were obtained using air and nitrogen atmospheres, indicating observed decomposition is probably thermal and not oxidative.
Description of key information
Diammonium hexachloroiridate decomposed from approximately 60°C with signs of partial melting of the decomposition product from approximately 325°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 325 °C
Additional information
Melting point was determined in a GLP-compliant study using differential scanning calorimetry, using ASTM E537-86 and designed to be compatible with EU method A1 and OECD guideline 102 (Harlan 2011). Diammonium hexachloroiridate decomposed from approximately 60°C with signs of partial melting of the decomposition product from approximately 325°C.
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