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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1993
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: reliable, well-documented GLP study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1993
Report date:
1994

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
capillary method
Remarks:
additionally: DSC (thermal analysisis)

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Melting / freezing pointopen allclose all
Melting / freezing pt.:
473 - 480 K
Atm. press.:
1 atm
Decomposition:
yes
Decomp. temp.:
458 - 474 K
Remarks on result:
other: observed in the liquid bath
Melting / freezing pt.:
461 - 483 K
Atm. press.:
1 atm
Decomposition:
yes
Decomp. temp.:
461 - 483 K
Remarks on result:
other: endothermic processes (melting and decompositio)n measured by DSC

Any other information on results incl. tables

While the test substance was heated it decomposed into a liquid and a gas. Both determined temperature ranges in which the decomposition of substance took place were nearly in conformity (DSC: 461 K to 483 K; Liquid bath: 458 K to 474 K). The blue coloration of pH-paper caused by the evolving gas supports the assumption, that NH3 was released in the above listed temperature range. This is a supplementary proof that the test substance decomposes.

Applicant's summary and conclusion

Conclusions:
The liquefaction was observed in the range of 458 to 474 K. The process of liquefaction was superposed by decomposition in the range of 461 t0 483 K.