2-[[3-acetamido-4-[(2-chloro-4-nitrophenyl)azo]phenyl](2-cyanoethyl)amino]ethyl acetate

Stability: thermal, sunlight, metals

Link to relevant study record(s)

Reference

Endpoint:

thermal stability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

March 22th 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

1981

GLP compliance:

no

Test substance thermally stable:

no

Operating temp.:

ca. 130 - ca. 170 °C

Remarks on result:

other: endothermic effect

Operating temp.:

ca. 180 - ca. 340 °C

Remarks on result:

other: exothermic effect

Remarks:

average decomposition energy release of -1410 J/g

Transformation products:

no

Results of the DSC-measurements

Measurement No.	Sample weight / mg	Start of effect / °C	Energy^1)/ J/g
PN17505	6.44	130 (endothermic)	70
		210 (exothermic)	-1370
PN17507	5.76	130 (endothermic)	60
		180 (exothermic)	-1440

 ¹⁾ Values are rounded

Conclusions:

The DSC-measurements showed an exothermic effect in the temperature range of 180-340°C with an average decomposition energy of -1410 J/g. The test item was black after the DSC-measurements.

Executive summary:

Two measurements with about 6 mg of the test item in a closed glass crucible under air atmosphere were performed. The upper end of the crucible was closed by melting with an oxyhydrogen flame. The crucible was then re-weighed with an accuracy of 0.01 mg. For the DSC (Differential Scanning Calorimetry) measurements and the evaluation of the heat flux a glass crucible with aluminium oxide was used as reference crucible. The determination of the thermal stability of the test item was performed via DSC. The prepared crucibles (crucible with test item and reference crucible) were placed in the DSC apparatus. Both crucibles were heated up from room temperature to 500 °C with a heating rate of 3 K/min. For the determination of the thermal stability, two investigations were performed.

The DSC-measurements showed an exothermic effect in the temperature range of 180 - 340 °C with an average decomposition energy of -1410 J/g. The test item was black after the DSC-measurements.

Description of key information

In the temperature range of 130 – 170 °C an endothermic effect could be observed. An exothermic effect was detected in the temperature range of 180 – 340 °C with an average energy release of ‑1410 J/g.

Additional information

Two measurements with about 6 mg of the test item in a closed glass crucible under air atmosphere were performed. The upper end of the crucible was closed by melting with an oxyhydrogen flame. The crucible was then re-weighed with an accuracy of 0.01 mg. For the DSC (Differential Scanning Calorimetry) measurements and the evaluation of the heat flux, a glass crucible with aluminium oxide was used as reference crucible. The determination of the thermal stability of the test item was performed via DSC. The prepared crucibles (crucible with test item and reference crucible) were placed in the DSC apparatus. Both crucibles were heated up from room temperature to 500 °C with a heating rate of 3 K/min. Two runs were performed.