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Boiling point

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Reference
Endpoint:
boiling 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 perormed using standard methods of analysis
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Principles of method if other than guideline:
The boiling point determination of Test item 1-phenylazo-2-naphthol (CAS No. 842-07-9 ) was done as per the test guideline OECD 103. The method followed was according to Siwoloboff.
GLP compliance:
no
Type of method:
other: Siwoloboff
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
Boiling pt.:
> 265 °C
Atm. press.:
978.2 hPa
Remarks on result:
other: no other details available

Method Details

Observations

Remarks if, any

Guideline

OECD 103

 

Method

Method according to

Siwoloboff

 

Principle of Boiling

point test

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

Silicone oil

SILICON

Atmospheric

pressure

hPa

978.2

mean Boiling

point (°C)

(RESULT)

°C

Greater than 265

Conclusions:
The boiling point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9) was done following OECD Guideline 103 and according to the method of Siwoloboff. The test was conducted and the chemical melts at 157.1-162.3 °C.String of bubbles were not observed but the test item rises in capillary above 265°C,inferring boiling point to be greater than 265°C at 978.2 hPa at 978.2 hPa.
Executive summary:

The boiling point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9) was done following OECD Guideline 103 and according to the method of Siwoloboff. The test was conducted and the chemical melts at 157.1-162.3 °C. String of bubbles were not observed but the test item rises in capillary above 265°C, inferring boiling point to be greater than 265°C at 978.2 hPa at 978.2 hPa.

Description of key information

The boiling point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9) was done following OECD Guideline 103 and according to the method of Siwoloboff. The test was conducted and The chemical melts at 157.1-162.3 °C.String of bubbles were not observed but the test item rises in capillary above 265°C,inferring boiling point to be greater than 265°C at 978.2 hPa at 978.2 hPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
265 °C

Additional information

The boiling point determination of 1-phenylazo-2-naphthol (CAS No. 842-07-9) was done following OECD Guideline 103 and according to the method of Siwoloboff. The test was conducted and The chemical melts at 157.1-162.3 °C.String of bubbles were not observed but the test item rises in capillary above 265°C,inferring boiling point to be greater than 265°C at 978.2 hPa at 978.2 hPa.