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Physical & Chemical properties

Melting point / freezing point

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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
2012-10-05 to 2013-01-09
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Cross-reference
Reason / purpose for cross-reference:
reference to same study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report date:
2013

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
thermal analysis
Remarks:
Differential Scanning Calorimetry (DSC)

Test material

Constituent 1
Chemical structure
Reference substance name:
2-[[(4-methoxyphenyl)methylhydrazono]methyl]-1,3,3-trimethyl-3H-indolium methyl sulphate
EC Number:
258-946-7
EC Name:
2-[[(4-methoxyphenyl)methylhydrazono]methyl]-1,3,3-trimethyl-3H-indolium methyl sulphate
Cas Number:
54060-92-3
Molecular formula:
C20H24N3O.CH3O4S C21H27N3O5S
IUPAC Name:
2-{[2-(4-methoxyphenyl)-2-methylhydrazin-1-ylidene]methyl}-1,3,3-trimethyl-3H-indol-1-ium methyl sulfate
Test material form:
solid

Results and discussion

Melting / freezing point
Melting / freezing pt.:
> 111 - < 159 °C
Atm. press.:
ca. 1 013 hPa
Decomposition:
yes
Decomp. temp.:
> 175 - < 265 °C

Any other information on results incl. tables

Thermal Stability (DSC)

The DSC-measurement in a closed glass crucible with the test item showed a two-stage endothermal effect in the temperature range of 100- 155 °C. An exothermal was observed in the temperature range of 175 - 260 °C with an energy of 583 J/g.

Melting Point / Boiling Point / (DSC and capillary measurement)

A DSC-run up to 300 °C in an aluminium crucible with a hole showed a two-step endothermic effect in the temperature range of 85 - 160 °C and an exothermal effect in the temperature range of 175 - 265 °C. An optical inspection showed a black residue.

Two DSC-runs up to 200 °C in an aluminium crucible with a hole showed a two-step endothermic effect in the temperature range of 95 - 155 °C and an exothermal effect in the temperature range of 175 - 265 °C. The test item appeared dark and melted after the measurement. Due to the broad shape of the endothermic signals no onset temperatures can be identified as a melting point. ln order to clarify the results of the DSC measurements an additional measurement with the capillary method was performed.

Due to the results of the capillary measurements it is concluded that the test item has a melting range of approx. 111 - 159 °C.

Applicant's summary and conclusion

Conclusions:
In conclusion, due to the results of the capillary measurements it is concluded that the test item has a melting range of approx. 111 - 159 °C.
Executive summary:

The melting temperature of the test substance was determined using differential scanning calorimetry (DSC). First , a thermal stability measurement (DSC) in a closed glass crucible with the test item showed a two-stage endothermal effect in the temperature range of 100- 155 °C. An exothermal was observed in the temperature range of 175 - 260 °C with an energy of 583 J/g.

Afterwards, a DSC-run up to 300 °C in an aluminium crucible with a hole showed a two-step endothermic effect in the temperature range of 85 - 160 °C and an exothermal effect in the temperature range of 175 - 265 °C. An optical inspection showed a black residue. Two DSC-runs up to 200 °C in an aluminium crucible with a hole showed a two-step endothermic effect in the temperature range of 95 - 155 °C and an exothermal effect in the temperature range of 175 - 265 °C. The test item appeared dark and melted after the measurement. Due to the broad shape of the endothermic signals no onset temperatures can be identified as a melting point.

ln order to clarify the results of the DSC measurements an additional measurement with the capillary method was performed.

Due to the results of the capillary measurements it is concluded that the test item has a melting range of approx. 111 - 159 °C.

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