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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-01-09 – 2017-01-09
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:
The melting point determination of Test item 1-phenylazo-2-naphthol (CAS No. 842-07-9 ) was done as per the test guideline OECD 102
GLP compliance:
no
Type of method:
other: Capillary/metal block.
Specific details on test material used for the study:
Name of test material (as cited in study report): 1-phenylazo-2-naphthol
Molecular formula :C16H12N2O
Molecular weight :248.284
Smiles notation : c12c(\N=N\c3ccccc3)c(ccc1cccc2)O
InChl : 1S/C16H12N2O/c1915111012645914(12)16(15)1817137213813/h111,19H/b1817+
Physical State: Solid
Substance type: Organic
Key result
Melting / freezing pt.:
157.1 - 162.3 °C
Atm. press.:
976.85 hPa
Decomposition:
no
Sublimation:
no
Conclusions:
The melting point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9) 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 157.1°C - 162.3°C at 976.8hPa.
Executive summary:

The melting point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9) 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 157.1°C -162.3°C at 976.8hPa.

Description of key information

The melting point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9) 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 157.1°C -162.3°C at 976.8hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
157.1 °C

Additional information

The melting point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9) 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 157.1°C -162.3°C at 976.8hPa.

Other supporting studies from various reliable sources such as authoritative database and handbooks suggests that the melting point of chemical was reported to be in the range of 131 degree C to 134 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 temperature as 157.1 degree C to 162.3 degree C, thus considered as key study for the chemical safety assessment.

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