Disodium ar,ar'-[(9,10-dihydro-9,10-dioxo-1,4-anthrylene)diimino]bis[(4-chlorophenoxy)benzenesulphonate]

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 from 19 to 23, 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 on 27 July 1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

adopted on 12 May 1981

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Decomposition:

yes

Decomp. temp.:

249 - 264 °C

During the heating up phase, endothermic signal was recorded in the temperature range of approx. 29 – 101 °C that can be associated with the water loss.

Then, an endothermic reaction occurred between ca 249 and 264 °C, which can be associated to decomposition of the substance.

Replication No.	Appearance of the Test Item at the start	Initial Weight of the Test Item, (mg)	Retained Residue (mg (%))	Appearance of the Test Item at the end
R1	Green Powder	1.6	0.4 (25 %)	Black Powder
R2	Green Powder	1.8	0.6 (33.3 %)	Black Powder

Conclusions:

The substance decomposes before melting/boiling (at ca 249 °C).

Executive summary:

The thermal behaviour of the test item was investigated by Differential Scanning Calorimetry method, according to the OECD guidelines 102 and 113. A small amount of test item placed in aluminum cosed crucible and inserted into the furnace of the DSC device. The temperature was increased from 25 to 500 °C with 10 °C/minutes heating rate. The measurement was performed under nitrogen atmosphere. The experiment was performed in duplicate.

During the heating up phase, endothermic signal was recorded in the temperature range of approx. 29 – 101 °C that can be associated with the water loss. Then, an endothermic reaction occurred between ca 249 and 264 °C, which can be associated to decomposition of the substance.

Based on the study results, it is concluded the test item undergoes decomposition starting from approximately 249 °C up to 264 °C. No reactions of melting/boiling reaction attributable to the test item were recorded.

Conclusion

The substance decomposes before melting/boiling (at ca 249 °C).

Description of key information

The substance decomposes before melting/boiling (at ca 249 °C).

Additional information

OECD 102/113 - Differential Scanning Calorimetry