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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-06-27 to 2018-03-15
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
1995-07-27
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
2008-05-30
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Atm. press.:
1 013 Pa
Decomposition:
yes
Decomp. temp.:
>= 350 - <= 470 °C

During the heating phase an endothermic effect was observed in the temperature range of 50- 100 °C, which can be assigned to the melting of the test item.

The test item showed a second endothermic signal in the temperature range of approx. 350 - 470 °C.

No further thermal effects were observed up to the test end temperature of 500 °C.

Results of the DSC-measurements:

DSC run No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

PN13662

12.59

70.15 / 86.10

391.73

50 – 100 (endo)

350 – 470 (endo)

12.54

997.0

PN13824

10.37

69.32 / 85.31

389.07

50 – 100 (endo)

350 – 470 (endo)

10.44

998.9

Due to the shape of the second endothermic effect, which could not clearly be related to a boiling of the test item, a test with the capillary method was performed to verify a boiling or an endothermic decomposition.

The test item was tested with the capillary method in the temperature range 280 °C to 400 °C with a heating rate of 1 K/min. After the measurement a black residue remained in the boiling capillary.

The visual inspection of the measurement showed no boiling but decomposition accompanied with the release of volatile decomposition products of the test item in the temperature range of the endothermic effect seen in the DSC.

Conclusions:
The test item N'N'-[(methylimino)bis-(trimethlene)]bis-(stearamide) decomposes accompanied with the release of volatile decomposition products in a temperature from 350 - 470 °C.
Executive summary:

The Boiling Point of N,N′-[(methylimino)bis-(trimethlene)]bis-(stearamide) was determined by differential scanning calorimetry according to OECD Guideline 103 (27 July 1995) and according to the test method A.2." Boiling Temperature" as described in the Council Regulation (EC) No 440/2008 of 30 May 2008. The heating phase covered a range from room temperature to 500 °C.

During the heating phase an endothermic effect (double peak) was observed in the temperature range of 50 - 100°C, which can be assigned to the melting of the test item.

The test item showed a second endothermic signal in the temperature range of approx. 350 -470 °C. No further thermal effects were observed up to the test end temperature of 500°C.

Due to the shape of the second endothermic effect, which could not clearly be related to a boiling of the test item, a test with the capillary method was performed to verify a boiling or an endothermic decomposition.

The test item was tested with the capillary method in the temperature range 280 °C to 400 °C with a heating rate of 1 K/min. After the measurement a black residue remained in the boiling capillary.

The visual inspection of the measurement showed no boiling but decomposition accompanied with the release of volatile decomposition products of the test item in the temperature range of the endothermic effect seen in the DSC.

The test item N'N'-[(methylimino)bis-(trimethlene)]bis-(stearamide) decomposes accompanied with the release of volatile decomposition products in a temperature from 350 - 470 °C.

Description of key information

The test item N'N'-[(methylimino)bis-(trimethlene)]bis-(stearamide) decomposes accompanied with the release of volatile decomposition products in a temperature from 350 - 470 °C, using differential scanning calorimetry.

Key value for chemical safety assessment

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