Tetrasodium [2-({4-fluoro-6-[(2-{[4-fluoro-6-({5-(hydroxykappaO)-6-[(2-{[2-(hydroxy-kappaO)-5-sulfophenyl] diazenyl-kappaN1}-4,5-dimethoxyphenyl) diazenyl-kappaN2]-7-sulfo-2-naphthyl} amino)-1,3,5-triazin-2-yl] amino} propyl) amino]-1,3,5-triazin-2-yl} amino) benzene-1,4- disulfonato(6-)] cuprate(4-)

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experiment start date - 30 March 2006; Experiment completion date - 06 April 2006; Study completion date - 13 July 2006

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

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:

yes (incl. QA statement)

Type of method:

thermal analysis

Specific details on test material used for the study:

Identity: FAT 40825/A
Batch number: CHU 297 / BOP 04/05
Purity: Organic part (Na-salt): approx. 83.7 %; All coloured components: approx. 80.54 %; Main component: approx. 59.1 %.
Appearance: Solid, black powder
Storage conditions: At room temperature at about 20 °C
Expiry date: December 31, 2010

Melting / freezing pt.:

> 300 °C

Atm. press.:

1 atm

Decomposition:

no

Remarks on result:

other: the endothermic reaction was observed between about 81 °C and 210 °C. The endothermic heat effect was not due to melting, as the test item was still a black powder after the test

In order to determine the endothermic reaction more precisely, two further DSC-runs were recorded as main tests with 15.32 mg and 13.29 mg of test item, respectively, between 40 °C and 300 °C with a heating rate of 10 °C/min. In both main test runs, the endothermic reaction was observed between about 81 °C and 210 °C. The endothermic heat effect was not due to melting, as the test item was still a black powder after the test. However, further evaluation is beyond of the scope of the study. During these runs, the sample lost about 11 % and 10 % of its mass, respectively.

Conclusions:

The melting point of FAT 40825/A was found to be > 300 °C.

Executive summary:

The determination of the melting point / melting range of the test item was performed according to the EEC Directive 92/69, A.1 "Melting/Freezing temperature", December 1992 and to the OECD Guideline No. 102: "Melting point / melting range", adopted July 27, 1995. In order to determine the endothermic reaction more precisely, two further DSC-runs were recorded as main tests with 15.32 mg and 13.29 mg of test item, respectively, between 40 °C and 300 °C with a heating rate of 10 °C/min. In both main test runs, the endothermic reaction was observed between about 81 °C and 210 °C. The endothermic heat effect was not due to melting, as the test item was still a black powder after the test. However, further evaluation is beyond of the scope of the study. During these runs, the sample lost about 11 % and 10 % of its mass, respectively. In conclusion, FAT 40825/A does not melt under the conditions of the test. The melting point of the test material was determined to be above 300 °C.

Description of key information

The melting point of the test material was determined to be above 300 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

300 °C

Additional information

The determination of the melting point / melting range of the test item was performed according to the EEC Directive 92/69, A.1 "Melting/Freezing temperature", December 1992 and to the OECD Guideline No. 102: "Melting point / melting range", adopted July 27, 1995. In order to determine the endothermic reaction more precisely, two further DSC-runs were recorded as main tests with 15.32 mg and 13.29 mg of test item, respectively, between 40 °C and 300 °C with a heating rate of 10 °C/min. In both main test runs, the endothermic reaction was observed between about 81 °C and 210 °C. The endothermic heat effect was not due to melting, as the test item was still a black powder after the test. However, further evaluation is beyond of the scope of the study. During these runs, the sample lost about 11 % and 10 % of its mass, respectively. In conclusion, FAT 40825/A does not melt under the conditions of the test. The melting point of the test material was determined to be above 300 °C.