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Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
03-11-2016 – 03-11-2016
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 102 (Melting point / Melting Range)
Principles of method if other than guideline:
The melting point determination of Test item Benzimidazole (CAS No. 51-17-2) was done as per the test guideline OECD 102 via Capillary/metal block method.
GLP compliance:
not specified
Type of method:
other: Capillary/metal block method
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
Melting / freezing pt.:
>= 158.83 - <= 166 °C
Atm. press.:
977 hPa
Decomposition:
no
Sublimation:
no
Remarks on result:
other: no other details mentioned

 

TEST DESCRIPTION AND RESULT

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

 

Yes

Atmospheric pressure

hPa

977hPa

Decomposition

Decomposition temperature(°C), if applicable

No

Sublimation

Sublimation temperature(°C), if applicable

No

Mean Melting temperature range

°C

158.83 - 166°C
Conclusions:
The Mean Melting temperature range of Benzimidazole (CAS No. 51-17-2) was found be 158.83 - 166°C at 977 hPa.
Executive summary:

The melting point determination of Benzimidazole (CAS No. 51-17-2) 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 determined to be 158.83 - 166°C at 977 hPa.

Description of key information

The Mean Melting temperature range of Benzimidazole (CAS No. 51-17-2) was found be 158.83 - 166°C at 977 hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
166 °C

Additional information

The melting point determination of Benzimidazole (CAS No. 51-17-2) 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 determined to be 158.83 - 166°C at 977 hPa.

Other supporting data from various reliable handbooks and authoritative databases, also determined the melting point of Benzimidazole (CAS No. 51-17-2) as 170.5 degree C, 172 degree to 174 degree C, 172.2 degree C and 170 degree C to 172 degree C respectively.