Reaction products of Sodium 1-amino-4-bromo-9,10-dioxoanthracene-2-sulphonate coupled with Aniline, subsequently coupled with p-(1,1-dimethylpropyl)phenol, subsequently coupled with Ethyl benzoylacetate, subsequently coupled with Fuming Sulfuric acid, sodium salts.

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:

March 02nd, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

adopted July 27, 1995

Qualifier:

according to guideline

Guideline:

other: OECD guideline 113 (Screening Test for Thermal Stability and Stability in Air)

Version / remarks:

adopted May 12, 1981

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

The test item was used in its initial form.

Decomposition:

yes

Decomp. temp.:

325 °C

Before the test the appearance of test item was purple powder. After the experiments the test item became a black melt with a few bubbles in the melt and its volume slightly increased.

	Sample weight [mg]	Total loss of Mass of the Sample (%)	Left Limit [°C]	Right Limit [°C]	Energy [J/g]
Repliate 1	3.96	36.9	324.75	338.30	4.21 (exothermic)
			359.14	405.67	11.38 (exothermic)
			406.73	436.84	4.82 (exothermic)
Repliate 2	4.72	36.2	359.70	441.70	37.24 (exothermic)

During the heating up phase endothermic signals were observed in the temperature range of approx. 130 – 190 °C that can be associated with the water loss of the test item. During the cooling down phase no thermal effects were observed from 200 to 25 °C.

	Sample weight [mg]	Total loss of Mass of the Sample (%)	Observation
Repliate 1	3.97	10.3	dark purple powder
Repliate 2	4.35	10.3	dark purple powder

Conclusions:

The test item starts to decompose before melting/boiling, at the temperature of approximately 325 °C.

Executive summary:

The thermal behaviour of the substance was investigated in accordance with method and procedures outlined into the OECD guidelines 102 and 113. The differential scanning calorimetry method was used. The test was carried out at normal atmospheric pressure. Applying a linear heating rate melting point was not observed from room temperature up to 500 °C. The experiment was performed in duplicate. A supplementary test was run, in order to clarify the thermal behavior of the substance. The prepared capsule was inserted into the furnace of the DSC device and heated from 25 to 180 °C and 200 °C with 10 °C/minutes heating rate, than cooled down to 25 °C.

Before the test the appearance of test item was purple powder; after the experiments the test item became a black melt with a few bubbles in the melt and its volume slightly increased. During the heating up phase endothermic signals were observed in the temperature range of approx. 130 – 190 °C that can be associated with the water loss of the test item. During the cooling down phase no thermal effects were observed from 200 to 25 °C.

Conclusion

The test item starts to decompose before melting/boiling, at the temperature of approximately 325 °C.

Description of key information

The test item starts to decompose before melting/boiling, at the temperature of approximately 325 °C.

Additional information

OECD 102/113 - differential scanning calorimetry