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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:
14-04-2017 – 15-04-2017
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
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Principles of method if other than guideline:
The temperature at which a solid becomes a liquid at standard atmospheric pressure is measured.
GLP compliance:
not specified
Type of method:
other: Capillary/metal block.
Key result
Melting / freezing pt.:
>= 231.5 - <= 235.6 °C
Atm. press.:
968.9 hPa
Decomposition:
no
Sublimation:
no

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

968.9hPa

Decomposition

Decomposition temperature

(°C), if applicable

 

No

Sublimation

 

Sublimation temperature

(°C), if applicable

No

Mean melting

temperature range

°C

231.5 °C-235.6°C

Conclusions:
The melting point determination of 4-(phenylazo)benzene-1,3-diamine (CAS No. 495-54-5) 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 231.5 °C-235.6°C at 968.9hPa.
Executive summary:

The melting point determination of Test item 4-(phenylazo)benzene-1,3-diamine (CAS No. 495-54-5 ) 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 231.5 °C-235.6°C at 968.9 hPa.

Description of key information

The melting point determination of 4-(phenylazo)benzene-1,3-diamine (CAS No. 495-54-5) 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 231.5 °C-235.6°C at 968.9hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
231.5 °C

Additional information

The melting point determination of 4-(phenylazo)benzene-1,3-diamine (CAS No. 495-54-5) 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 231.5 °C-235.6°C at 968.9hPa.

Supporting data from authorative handbook and database (Sax handbook and HSDB substance database)indicate that the melting point of 4-(Phenylazo)benzene-1,3-diamine in the range of 118-118.5°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 231.5 °C-235.6°C, thus considered as key study for the chemical safety assessment.