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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
Study period:
17-08-2017 – 17-08-2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental test result performed using standard test guidelines
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
no
Type of method:
other: Capillary/metal block
Test material information:
Composition 1
Key result
Melting / freezing pt.:
>= 153.5 - <= 156.6 °C
Atm. press.:
964.8 hPa
Decomposition:
no
Sublimation:
no
Remarks on result:
other: other details not available

Method Details

Observations

Remarks if,

any

Guideline

OECD 102

-

 

 

 

 

 

 

-

Method

Capillary/metal block

-

Principle of method

 

The temperature at which a

solid becomes a liquid at

standard atmospheric

pressure

-

Grinding of Test

item done

 

Not required

Atmospheric

pressure

hPa

964.8hPa

Decomposition

Decomposition temperature

(°C), if applicable

 

No

Sublimation

 

Sublimation temperature

(°C), if applicable

No

Mean melting

temperature range

°C

153.5-156.6°C

Conclusions:
The melting point determination of 1-(2,4-dimethylphenylazo)-2-naphthol (CAS No. 3118-97-6) 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 found to be 153.5-156.6°C at 964.8hPa.
Executive summary:

The melting point determination of Test item 1-(2,4-dimethylphenylazo)-2-naphthol (CAS No. 3118-97-6 ) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block. The Mean Melting Temperature Range was found to be 153.5-156.6°C at 964.8 hPa.

Description of key information

The melting point determination of 1-(2,4-dimethylphenylazo)-2-naphthol (CAS No. 3118-97-6) 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 found to be 153.5-156.6°C at 964.8hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
153.5 °C

Additional information

The melting point determination of Test item 1-(2,4-dimethylphenylazo)-2-naphthol (CAS No. 3118-97-6 ) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block. The Mean Melting Temperature Range was found to be 153.5-156.6°C at 964.8 hPa.

From the other reliable sources melting point of 1-[(2,4 -dimethylphenyl)diazenyl]-2-naphthol was determined to be in the range of 156 to 166°C, which is close to the selected key value.