Registration Dossier

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
January 23, 2004
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Valid method

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) / Differential Scanning Calorimetry (DSC)
Type of method:
thermal analysis
Remarks:
DTA/DSC

Test material

Constituent 1
Chemical structure
Reference substance name:
2-[[2-chloro-4-[3-chloro-4-[[1-(2,4-dimethylphenylamino)-1,3-dioxobutan- 2-yl]diazenyl]phenyl]phenyl]diazenyl]-N-(2-methylphenyl)-3-oxobutanamide
EC Number:
911-715-0
Molecular formula:
C36H34Cl2N6O4 // C35H32Cl2N6O4 // C34H30Cl2N6O4
IUPAC Name:
2-[[2-chloro-4-[3-chloro-4-[[1-(2,4-dimethylphenylamino)-1,3-dioxobutan- 2-yl]diazenyl]phenyl]phenyl]diazenyl]-N-(2-methylphenyl)-3-oxobutanamide
Constituent 2
Reference substance name:
Pigment Yellow 174
IUPAC Name:
Pigment Yellow 174

Results and discussion

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

Any other information on results incl. tables

The exothermal (decomposition) reaction shows an onset at approximately 300 °C (taken as decomposition temperature) and a peak at approximately 309 °C in the DSC curve, the reaction energy of the decomposition being approximately 130 J/g (mean from 2 measurements).

No discernible endothermal reaction (melting) was seen in the DTA.

Applicant's summary and conclusion

Conclusions:
Decomposition starts without discernible melting, the decomposition temperature is 300 °C.
Executive summary:

The DTA/DSC shows decomposition starting at 300 °C without discernible melting prior to decomposition.