Trisodium 7-[[4-chloro-6-[ethyl[3-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(4-methoxy-2-sulphonatophenyl)azo]naphthalene-2-sulphonate

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Study period:

From December 01, 1998 to December 03, 1998

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

RA study

Reason / purpose for cross-reference:

read-across source

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Decomposition:

yes

Decomp. temp.:

ca. 150 - ca. 315 °C

Remarks on result:

other: no melting point in the temperature range of 25-375°C

Remarks:

atm. press.: not specified

- The measurement in a closed glass pan did not show any endothermic effect prior to a decomposition of the test substance in the range of 150 -290°C, with a decomposition energy of 290 J/g.

- The measurement in an aluminium pan showed a broad endothermal effect in the range of 140 - 215°C, which can be explained by drying of the test substance. At about 215°C, a exothermal decomposition was observed in the range 215 - 315°C, with a decomposition energy of 275 J/g.

Conclusions:

Under the study conditions, the substance did not show any melting point but only an exothermal decomposition starting at 150°C.

Executive summary:

A study was conducted to determine the melting point of the read across substance Reaktiv Scharlach F97 -0319 according to EU Method A.1, in compliance with GLP. The differential scanning calorimetry method was used in this study. The determination of the the melting point was carried out in closed glass pan (with a heating rate of 3.0 K/min) and covered aluminium pan (with a heating rate of 10.0 K/min). The measurement in a closed glass pan did not show any endothermic effect prior to a decomposition of the test substance in the range of 150 -290°C, with a decomposition energy of 290 J/g. The measurement in an aluminium pan showed a broad endothermal effect in the range of 140 - 215°C, which can be explained by drying of the test substance. At about 215°C, a exothermal decomposition was observed in the range 215 - 315°C, with a decomposition energy of 275 J/g. Under the study conditions, the substance did not show any melting point but only an exothermal decomposition starting at 150°C (Hoffman, 1999).

Description of key information

The melting point was determined according to EU Method A.1 (Hoffman, 1999).

Additional information

No melting point was observed but only an exothermal decomposition starting at 150°C.