4-(phenylazo)benzene-1,3-diamine

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

14-04-2017 – 14-04-2017

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

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Principles of method if other than guideline:

The boiling point of a liquid is the temperature at which that liquid is converted to a gaseous state. It can be defined as the temperature at which the vapour pressure of the liquid becomes equal to the pressure at the surface of the liquid.

GLP compliance:

no

Type of method:

method according to Siwoloboff

Key result

Boiling pt.:

> 300 °C

Atm. press.:

970.2 hPa

Decomposition:

no

Method Details		Observations	Remarks if, any
Guideline	OECD 103	-	the test item does not show string of bubbles upto 305 °C, inferring boiling point greater than 300°C.
Method	Method according to Siwoloboff	-
Principle of method	A sample is heated gradually in a tube which is immersed in a liquid bath. The sample tube is held in close contact with a thermometer and it contains a boiling capillary which is fused about1 cm above its lower end. Upon approach of the boiling temperature bubbles emerge rapidly from the lower open end of the capillary. The boiling temperature is that temperature at which, on momentary cooling, the string of bubbles stops and liquid suddenly rises in the capillary.	-
Quantity of chemical used	g/ml	2 g
Nature of the Bath taken	·       Oil bath ·       Water bath	OIL
	If oil bath is used, specify ·       Liquid paraffin ·       Silicon oil	Silicon oil
Atmospheric pressure	hPa	970.2
(°C) (RESULT)	°C	greater than 300

Conclusions:

The boiling point determination of 4-(phenylazo)benzene-1,3-diamine (CAS No. 495-54-5) was done following OECD Guideline 103 and according to the method of Siwoloboff. The test item does not show string of bubbles upto 305 °C, inferring boiling point to be greater than 300°C.at 970.2 hPa.

Executive summary:

The boiling point determination of Test item 4-(phenylazo)benzene-1,3-diamine (CAS No. 495-54-5 ) was done as per the test guideline OECD 103. The method followed was

according to Siwoloboff. the test item does not show string of bubbles upto 305 °C, inferring boiling point to be greater than 300°C at 970.2 hPa.

Description of key information

The boiling point determination of 4-(phenylazo)benzene-1,3-diamine (CAS No. 495-54-5) was done following OECD Guideline 103 and according to the method of Siwoloboff. The test item does not show string of bubbles upto 305 °C, inferring boiling point to be greater than 300°C.at 970.2 hPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

300 °C

Additional information

The boiling point determination of Test item 4-(phenylazo)benzene-1,3-diamine (CAS No. 495-54-5 ) was done as per the test guideline OECD 103. The method followed was

according to Siwoloboff. the test item does not show string of bubbles upto 305 °C, inferring boiling point to be greater than 300°C at 970.2 hPa.

Other supporting data from reliable handbook source (SAX handbook) the boiling point of 4-(Phenylazo)benzene-1,3-diamine is determined to be 286°C.

As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of boiling point as >300°C, thus 300°C is considered as key study for the chemical safety assessment.