Registration Dossier
Registration Dossier
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EC number: 269-503-2 | CAS number: 68259-00-7
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Reported 04Dec2001
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 001
- Report date:
- 2001
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- not specified
- GLP compliance:
- yes
- Type of method:
- other: Differential Scanning Calorimeter
Test material
- Reference substance name:
- Methyl 1-methyl-4-[(methylphenylhydrazono)methyl]pyridinium sulphate
- EC Number:
- 269-503-2
- EC Name:
- Methyl 1-methyl-4-[(methylphenylhydrazono)methyl]pyridinium sulphate
- Cas Number:
- 68259-00-7
- Molecular formula:
- C14H16N3.CH3O4S
- IUPAC Name:
- methyl 1-methyl-4-[(methylphenylhydrazono)methyl]pyridinium sulphate
- Test material form:
- solid: particulate/powder
- Details on test material:
- See study reports for batch and purity information
Constituent 1
- Specific details on test material used for the study:
- Chemical name: Pyridinium, 1 -methyl-4-[(methylphenylhydrazono)methyl]-
methyl sulphate
CAS Number: 68259-00-7
Physical state: Yellow powder
Sponsor batch: 028400A8AA
Purity: 90.5% (stated by Sponsor)
Expiry date: 1 November 2003 (stated by Sponsor)
Storage conditions: Room temperature (10 to 30°C)
Results and discussion
Melting / freezing point
- Key result
- Melting / freezing pt.:
- >= 150 - <= 164 °C
- Atm. press.:
- ca. 1 atm
- Decomposition:
- yes
- Remarks:
- Decomposition was seen to occur above nominally 240°C
- Decomp. temp.:
- >= 240 °C
- Sublimation:
- no
Any other information on results incl. tables
There were two definite melting events between 94 and 97°C, and between 99 and 101°C, indicated by the small double endotherm. The parameter values replicate well in the repeated segments of Run 2. These two events are considered due to impurities. The main endotherm, representing melting of the active ingredient, was between 150 and 164°C. A degradation process was subsequently observed to be taking place, indicated by the broad exotherm above 240°C. A black crispy residue remained at the end of the tests.
Applicant's summary and conclusion
- Conclusions:
- The overall conclusion from this study is that the test item melts at nominally 150-164°C (423 to 437 K). Decomposition was seen to occur above nominally 240°C (513 K). There were additional melting signals, due to impurities, between 94 and 101°C (367 and 374 K).
- Executive summary:
The overall conclusion from this study is that the test item melts at nominally 150-164°C (423 to 437 K). Decomposition was seen to occur above nominally 240°C (513 K). There were additional melting signals, due to impurities, between 94 and 101°C (367 and 374 K).
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