Reaction products of disodium 3,5-diamino-2-[(2-sulfonatophenyl)diazenyl]benzoate and  diazotised sodium 2-[(4-aminophenyl)sulfonyl]ethyl sulfate

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 and end date - 04 March 2003; Study completion date - 28 April 2003

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 40810/A
Batch: WP 6/02
Purity: approx. 75 %
Appearance: Solid, dark brownish powder
Expiration date: 12 December 2010
Storage: At room temperature at about 20 °C

Melting / freezing pt.:

> 400 °C

Atm. press.:

1 atm

Decomposition:

no

Remarks on result:

other: Does not melt under the conditions of the test: max. test temp. >400°C

After measurement, the sample had lost about 21 % of its mass and the sample was black and carbonized. No.melting was observed.

 

Conclusions:

In conclusion, FAT 40810/A does not melt under the conditions of the test: max. test temp. >400 °.C

Executive summary:

The determination of the melting point was performed according to the EEC Directive 92/69, A.1 and OECD Guideline No 102. The DSC-curve of the preliminary test (heating rate of 20 K/min from 25 °C to 400 °C) was recorded. A not well defined endothermic heat effect was observed starting at about 65 °C. Starting at about 220 °C, an exothermic heat effect was observed. After the experiment, the sample had lost about 21 % of its mass and the sample was black and carbonized. In order to check the effects during the heating more precisely, further DSC-runs were recorded as main study between 25 °C and 270 °C with a heating rate of 10 K/min. During both runs no effect was observed from which the melting of the test item could be deduced. During these runs, the sample lost 9 % and 10 % of its mass, respectively. After the measurement the sample was black and carbonized. FAT 40810/A does not melt under the conditions of the test: max. test temp. > 400°C

Description of key information

The determination of the melting point was performed according to the EEC Directive 92/69, A.1 and OECD Guideline No 102. The DSC-curve of the preliminary test (heating rate of 20 K/min from 25 °C to 400 °C) was recorded. A not well defined endothermic heat effect was observed starting at about 65 °C. Starting at about 220 °C, an exothermic heat effect was observed. After the experiment, the sample had lost about 21 % of its mass and the sample was black and carbonized. In order to check the effects during the heating more precisely, further DSC-runs were recorded as main study between 25 °C and 270 °C with a heating rate of 10 K/min. During both runs no effect was observed from which the melting of the test item could be deduced. During these runs, the sample lost 9 % and 10 % of its mass, respectively. After the measurement the sample was black and carbonized. FAT 40810/A does not melt under the conditions of the test: max. test temp. >400 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

400 °C