Registration Dossier
Registration Dossier
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EC number: 203-251-6 | CAS number: 104-91-6
Melting point / freezing point
Administrative data
- 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 with acceptable restrictions
- Justification for type of information:
- Performed to guidline, but limited detail reported
Various secondary sources of data suggest thermal degradation prior to melting, with instability starting at 100 - 120 C and reported melting temperatures between ca 110 and 135 C. The precise melting temperature is academic in view of thermal instability and the self-reactivity of the substance.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Principles of method if other than guideline:
- Thermogravimetric methods used to demonstrate initial degradation prior to melting for a range of phenol derivatives
- GLP compliance:
- yes
- Type of method:
- hot stages
Test material
- Reference substance name:
- 4-nitrosophenol
- EC Number:
- 203-251-6
- EC Name:
- 4-nitrosophenol
- Cas Number:
- 104-91-6
- Molecular formula:
- C6H5NO2
- IUPAC Name:
- 4-nitrosophenol
- Test material form:
- solid
Constituent 1
- Specific details on test material used for the study:
- No details
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- ca. 133 °C
- Atm. press.:
- ca. 1 atm
- Decomposition:
- yes
- Decomp. temp.:
- > 120 °C
Any other information on results incl. tables
The testing laboratory did not record any observations, but various sources of data suggest decomposition will start at > 120 C
Applicant's summary and conclusion
- Conclusions:
- A result of 133 C was obtained from recent testing.
A primary research reference was found demonstrating thermal instabilty from 118 C
Various secondary sources of data suggest thermal degradation prior to melting, with instability starting at 100 - 120 C and reported melting temperatures between ca 110 and 135 C. The precise melting temperature is academic in view of thermal instability and the self-reactivity of the substance.
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