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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
02 Feb 2006
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Valid method

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2006
Report date:
2006

Materials and methods

Principles of method if other than guideline:
Differential thermal analysis (DTA)
Type of method:
thermal analysis

Test material

Constituent 1
Chemical structure
Reference substance name:
2-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxopropyl]azo]benzoic acid
EC Number:
250-830-4
EC Name:
2-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxopropyl]azo]benzoic acid
Cas Number:
31837-42-0
Molecular formula:
C18H15N5O5
IUPAC Name:
2-({2-oxo-1-[(2-oxo-2,3-dihydro-1H-benzimidazol-5-yl)carbamoyl]propyl}diazenyl)benzoic acid

Results and discussion

Melting / freezing point
Decomposition:
yes
Decomp. temp.:
>= 300 °C

Any other information on results incl. tables

No melting point was observed. Decomposition (with a mean energy of -157 J/g from three measurements) starts at 300 °C. This decomposition temperature was also observed with the sample in an open glass crucible under elevated air pressure (20 bar).

Applicant's summary and conclusion

Conclusions:
The test substance decomposes at 300 °C.
Executive summary:

The thermal behaviour of the test substance was determined with Differential Thermal Analysis (DTA) measurements. No melting was observed. Decomposition started at 300 °C.