Benzimidazole

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

05-11-2016 – 05-11-2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Experimental test result performed using standard OECD test guidelines

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Principles of method if other than guideline:

The boiling point determination of Test item Benzimidazole (CAS No. 51-17-2) was done as per the test guideline OECD 103 by Siwoloboff method.

GLP compliance:

not specified

Type of method:

method according to Siwoloboff

Specific details on test material used for the study:

- Name of test material : Benzimidazole
- Molecular formula : C7H6N2
- Molecular weight :118.1384 g/mol
- Smiles notation : c12c(nc[nH]1)cccc2
- InChl : 1S/C7H6N2/c12476(31)8597/h15H,(H,8,9)
- Substance Type: Organic
- Physical State: Solid crystalline powder (Off white)
- Purity: 99.5%

Key result

Boiling pt.:

> 250 °C

Atm. press.:

973.4 hPa

Decomposition:

no

Remarks on result:

other: The heating was continued till 250°C but no bubbles emerged from the capillary.Hence, the boiling point of the test item was inferred to be greater than 250°C.

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	973.4
mean Boiling point (°C) (RESULT)	°C	greater than 250

Conclusions:

The boiling point of Benzimidazole (CAS No. 51-17-2) is determined to be greater than 250°C at 973.4 hPa.

Executive summary:

The boiling point determination of Benzimidazole (CAS No. 51-17-2) was done following OECD Guideline 103 and according to the method of Siwoloboff. The boiling point was found to be greater than 250°C at 973.4 hPa.

Description of key information

The boiling point of Benzimidazole (CAS No. 51-17-2) is determined to be greater than 250°C at 973.4 hPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

250 °C

Additional information

The boiling point determination of Benzimidazole (CAS No. 51-17-2) was done following OECD Guideline 103 and according to the method of Siwoloboff. The boiling point was found to be greater than 250°C at 973.4 hPa.

Other supporting data from various reliable handbooks and authoritative databases, also determined the boiling point of chemical Benzimidazole as >360 degree C.