Sodium 3-(p-anilinophenylazo)benzenesulphonate

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

09-08-2017 – 09-08-2017

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

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Principles of method if other than guideline:

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 about 1 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.

GLP compliance:

no

Type of method:

method according to Siwoloboff

Specific details on test material used for the study:

- Name of test material : sodium 3-[(4-anilinophenyl)diazenyl]benzenesulfonate
- Molecular formula : C18H14N3O3S.Na
- Molecular weight: 375.383 g/mol
- Smiles notation : c1(Nc2ccccc2)ccc(\N=N\c2cc(ccc2)S(=O)(=O)[O-])cc1.[Na+]
- InChl : 1S/C18H15N3O3S.Na/c22-25(23,24)18-8-4-7-17(13-18)21-20-16-11-9-15(10-12-16)19-14-5-2-1-3-6-14;/h1-13,19H,(H,22,23,24);/q;+1/p-1/b21-20+;
- Substance type: Organic
- Physical state: Solid

Key result

Boiling pt.:

> 325 °C

Atm. press.:

970.4 hPa

Decomposition:

no

Method Details		Observations	Remarks if, any
Guideline	OECD 103	-	test item melts above 325°C ,inferring the boiling point to be greater than 325°C at 970.4 hPa.
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	1 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	970.4
Mean Boiling point(°C) (RESULT)	°C	greater than 325

Conclusions:

The boiling point determination of Sodium 3-(p-anilinophenylazo)benzenesulphonate (CAS No. 587-98-4) was done following OECD Guideline 103 and according to the method of Siwoloboff. The test item melts above 325 °C, inferring the boiling point to be greater than 325°C at 970.4 hPa.

Executive summary:

The boiling point determination of Test item Sodium 3-(panilinophenylazo) benzenesulphonate (CAS No. 587-98-4) was done as per the test guideline OECD 103. The method followed was according to Siwoloboff. test item melts above 325 °C, inferring the boiling point to be greater than 325°C at 970.4 hPa.

Description of key information

The boiling point determination of Test item Sodium 3-(panilinophenylazo) benzenesulphonate (CAS No. 587-98-4) was done as per the test guideline OECD 103. The method followed was according to Siwoloboff. test item melts above 325 °C, inferring the boiling point to be greater than 325°C at 970.4 hPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

325 °C

Additional information

The boiling point determination of Test item Sodium 3-(panilinophenylazo) benzenesulphonate (CAS No. 587-98-4) was done as per the test guideline OECD 103. The method followed was according to Siwoloboff. test item melts above 325 °C, inferring the boiling point to be greater than 325°C at 970.4 hPa.

Other supporting data based on the prediction done using the EPI Suite MPVPBP V1.43, indicates the boiling point of chemical sodium 3-[(4-anilinophenyl)diazenyl]benzenesulfonate to be 741.38 ˚C, which is greater than 325 ˚C and thus supports the key value.