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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2004
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Basic data given: comparable to guidelines/standards

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2004
Report date:
2004

Materials and methods

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

Test material

Constituent 1
Chemical structure
Reference substance name:
2-[(4-chloro-2-nitrophenyl)azo]-N-(2-chlorophenyl)-3-oxobutyramide
EC Number:
229-355-1
EC Name:
2-[(4-chloro-2-nitrophenyl)azo]-N-(2-chlorophenyl)-3-oxobutyramide
Cas Number:
6486-23-3
Molecular formula:
C16H12Cl2N4O4
IUPAC Name:
2-[(4-chloro-2-nitrophenyl)diazenyl]-N-(2-chlorophenyl)-3-oxobutanamide
Test material form:
solid: nanoform, no surface treatment

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
255 °C
Decomposition:
yes
Decomp. temp.:
259 °C

Any other information on results incl. tables

The DTA shows an endothermal reaction with an onset at 255.24 °C (rounded value of 255 °C taken as melting point) and a peak at 255.94 °C.

Decomposition starts from the melting substance. The (exothermal) decomposition reaction shows an onset at 258.98 °C (rounded value of 259 °C taken as decomposition temperature) and a peak at 289.99 °C, the reaction energy of the decomposition being 1146 J/g.

Almost identical values were obtained in a DTA with an open cup (under 20 bar air)

Applicant's summary and conclusion

Conclusions:
Decomposition starts from the melting substance, with a melting point of 255 °C and a decomposition temperature of 259 °C.
Executive summary:

The DTA shows decomposition from the melting substance starting at 259 °C with a melting point of 255 °C.

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