N-(2-nitrophenyl)phosphoric triamide

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:

2005-09-22 - 2005-11-08

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The GLP study was conducted according to an internationally accepted guideline. All study parameters are based on the specific guideline.

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

92/69/EWG, A.1 (DSC)

GLP compliance:

yes

Type of method:

thermal analysis

Key result

Atm. press.:

1 013 hPa

Decomposition:

yes

Decomp. temp.:

195.4 °C

Sublimation:

no

The DSC analysis was performed twice. According to the given information the temperature range for the investigation of the melting point was fixed in the range of about 30 °C. In each thermogram an endothermic signal followed by an exothermic signal was observed in the temperature range from 180 °C to 220 °C. The endothermic signals were evaluated and the following characteristic thermal data were determined.

run	weight [mg]	onset temperature [°C]	peak maximum [°C]
1	3.306	193.75	199.79
2	4.484	197.11	201.97
mean		195.4

The thermal stability of the test item was checked by a second run after cooling down of the samples. The thermograms of this runs showed an endothermic signal with an onset temperature of 62.7 °C (both samples), shown in Figure 3 for the first sample. According to this fact and the signals in the first run it can be concluded that the test item isn’t thermally stable.

The evaluation of the thermograms result in a decomposition temperature of the test item of 195.4 °C (onset temperature).

Conclusions:

N-(2-Nitrophenyl)phosphoric triamide decomposes at 195.4 °C.

Executive summary:

The melting point of N-(2-Nitrophenyl)phosphoric triamide was determined according to EU method A.1.

The test item is not thermally stable. It decomposed during the DSC analysis. The evaluation of the thermograms result in a decomposition temperature of the test item of 195.4 °C (onset temperature).

Description of key information

The melting point of N-(2-Nitrophenyl)phosphoric triamide was determined according to EU method A.1. N-(2-Nitrophenyl)phosphoric triamide decomposes at 195.4 °C.

Additional information

N-(2-Nitrophenyl)phosphoric triamide decomposes at 195.4 °C.