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Physical & Chemical properties

Melting point / freezing point

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Reference
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
Justification for type of information:
Experimental result performed using standard methods of analysis
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Principles of method if other than guideline:
The melting point of N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride was determined
GLP compliance:
not specified
Type of method:
capillary method
Specific details on test material used for the study:
- Name of test material: Gentian violet
- IUPAC name: N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride
- Molecular formula: C25H30ClN3
- Molecular weight: 407.986 g/mole
- Smiles : C(\c1ccc(N(C)C)cc1)(c1ccc(N(C)C)cc1)=C1\C=C\C(=[N+](/C)C)C=C1.[ClH-]
- Inchl: 1S/C25H30N3.ClH/c1-26(2)22-13-7-19(8-14-22)25(20-9-15-23(16-10-20)27(3)4)21-11-17-24(18-12-21)28(5)6;/h7-18H,1-6H3;1H/q+1;/p-1
- Substance type: Organic
- Physical state: Solid green powder
Key result
Melting / freezing pt.:
>= 198 - <= 250 °C
Remarks on result:
other: Softening and sticking to wall at ~205°C
Conclusions:
Thus the melting point of N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride observed in the range of 198-250 °C.
Executive summary:

The melting point of N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride was calculated according to OECD Guideline 102 by using capillary viscometer (static).

The substance N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride starts melting and swelling at 198°C, does not completely melt till 250°C. Softening and sticking to wall observed at ~205°C.

Thus the melting point of N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride observed in the range of 198-250 °C.

Description of key information

Thus the melting point of N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride observed in the range of 198-250 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
198 °C

Additional information

Based on available data from various reliable sources such as authoritative database, handbooks and study reports,

the melting point chemical N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloridewas determined as followed,

According to first study the melting point of N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N- methylmethanaminium chloride was calculated according to OECD Guideline 102 by using capillary viscometer (static).

The substance N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride starts melting and swelling at 198°C, does not completely melt till 250°C. Softening and sticking to wall observed at ~205°C.

Thus the melting point of N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride observed in the range of 198-250 °C.

Other supporting studies from various reliable resources like authoritative database and handbooks, exhibited the melting point of chemical N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride as 215 ˚C which is in the range of selected key study.

Data from one more supporting study determined the melting point chemical N-(4-{bis[4-(dimethylamino)phenyl]methylene}cyclohexa-2,5-dien-1-ylidene)-N-methylmethanaminium chloride in the range of 205-215 ˚C which is also in the range of selected key study.