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Physical & Chemical properties

Melting point / freezing point

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Link to relevant study record(s)

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
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Principles of method if other than guideline:
Melting temperature is measured
GLP compliance:
not specified
Type of method:
other: standard laboratory method
Specific details on test material used for the study:
- Name of test material:(8-((4-Amino-3-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylamm- onium chloride
- Molecular formula: C19H20N5O3Cl
- Molecular weight: 401.852 g/mol
- Smiles notation: [N+](c1cc(\N=N\c2c3cc([N+](C)(C)C)ccc3ccc2O)ccc1N)([O-])=O.[ClH-]
- Substance type: Organic
- Physical state: Solid
Melting / freezing pt.:
>= 182 - <= 187.5 °C
Atm. press.:
972.6 hPa
Decomposition:
no
Sublimation:
no
Remarks on result:
other: other details not available
Conclusions:
The melting point determination of [8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2- naphthyl]trimethylammonium chloride (CAS No. 68391-32-2) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined to be 182 °C-187.5°C at 972.6hPa.
Executive summary:

The melting point determination of [8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2- naphthyl]trimethylammonium chloride (CAS No. 68391-32-2) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined to be 182 °C-187.5°C at 972.6hPa.

Description of key information

The melting point determination of [8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2- naphthyl]trimethylammonium chloride (CAS No. 68391-32-2) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined to be 182 °C-187.5°C at 972.6hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
182 °C

Additional information

The melting point determination of [8-[(4-amino-3-nitrophenyl)azo]-7-hydroxy-2- naphthyl]trimethylammonium chloride (CAS No. 68391-32-2) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined to be 182 °C-187.5°C at 972.6hPa.

Other supporting study from review article also indicates that the melting point of chemical (8-((4-Amino-3-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylamm- onium chloride was determined  to be in the range of 200 degree C to 202 degree C.

As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of melting point as 182 degree C to 187.5 degree C,thus considered as key study for the chemical safety assessment