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Boiling point

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Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12. Feb. 2019 - 16. May 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
ca. 310 °C
Remarks on result:
not determinable
Remarks:
The substance decomposes at 138°C.
Conclusions:
As the test item showed signs of decomposition before boiling stage no validity criteria need to be considered. The substance decomposes. A boiling point could not be determined.
Executive summary:

The substance decomposes at 138 °C. A boiling point could not be determined. The boiling point of the decomposition product referring to the pre-test was determined under these circumstances as the second endothermic event. The event could not be completely detected because of the measuring limit of the instrument (445 °C). Beginning of boiling was detected at 347.06 °C (620.21 K) (lowest value) with a peak maximum at 402.82 °C (665.60 K) (highest value). A baseline level underrun was visible in all three determinations.

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
other: see remarks
Version / remarks:
The boiling point was assessed in a preliminary test at the determination of the melting point according to Annex V, EU Method A.1 (Differential Scanning Calorimeter).
Principles of method if other than guideline:
Preliminary test at the determination of the melting point according to Annex V, EU Method A.1 (Differential Scanning Calorimeter). Details of the experimental procedure are not specified.
GLP compliance:
not specified
Type of method:
other: Preliminary test at the determination of the melting point. Details not specified.
Remarks on result:
not determinable
Remarks:
The boiling point has not been determined. In a preliminary test at the determination of the melting point, it was found that at temperatures above 175 °C an exothermic reaction was observed, probably caused by reaction or decomposition of the test substance. After the test the sample appeared to have been molten and had a brown colour.
Conclusions:
The boiling point has not been determined. An exothermic reaction was observed above 175 °C, probably caused by reaction or decomposition of the test substance. After the test the sample appeared to have been molten and had a brown colour.
Executive summary:

The boiling point of 1,3-bis[12-hydroxy-octadecamide-N-methylene]-benzene has not been determined. At the determination of the melting point according to Annex V, EU Method A.1 (Differential Scanning Calorimeter), a preliminary test was carried out (details of the experimental procedure are not specified). Therein, an exothermic reaction was observed above 175 °C, probably caused by reaction or decomposition of the test substance. After the test the sample appeared to have been molten and had a brown colour.

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
92/69/EEC, A2 (Differential scanning calorimetery, ASTM E 537-76 OECD Guideline No. 103)
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Atm. press.:
ca. 101.3 kPa
Decomposition:
yes
Decomp. temp.:
>= 144 °C
Remarks on result:
not determinable

The test substance melted from 115 to 124 °C followed by decomposition from 144 °C. A chemical change was observed between 125 and 140 °C. After the test, sample remains were black and crispy.

Conclusions:
No boiling point was observed for the test substance 12-hydroxyoctadecanoic acid, reaction products with 1,3-benzenedimethanamine and hexamethylenediamine. The test substance melted from 115 to 124 °C followed by decomposition from 144 °C. A chemical change was observed between 125 and 140 °C. After the test, sample remains were black and crispy.
Executive summary:

The boiling point of the test substance 12-hydroxyoctadecanoic acid, reaction products with 1,3-benzenedimethanamine and hexamethylenediamine was assessed in a guideline study according to EU Method A.2 (Differential scanning calorimetery). No boiling point was observed. The test substance melted from 115 to 124 °C followed by decomposition from 144 °C. A chemical change was observed between 125 and 140 °C. After the test, sample remains were black and crispy.

Description of key information

The substance consists of multiple different constituents with similar chemical structure: N,N'-ethane-1,2-diylbis(12-hydroxyoctadecanamide), N,N'-hexane-1,6-diylbis(12-hydroxyoctadecanamide) and N,N'-[1,3-phenylenebis(methylene)]bis(12-hydroxyoctadecanamide).There are no experimental data on the multi-constituent substance available. The individual constituents and mixtures of structurally similar bisamides are considered suitable read-across substances. In experimental studies on the read-across substances 1,3-bis[12-hydroxy-octadecamide-N-methylene]-benzene, 12-hydroxyoctadecanoic acid, reaction products with 1,3-benzenedimethanamine and hexamethylenediamine and N,N'-ethane-1,2-diylbis(12-hydroxyoctadecanamide) decomposition of the test material was observed before the onset of boiling (decomposition temperature: 138 – 175 °C). Since all constituents are structurally similar to each other, the boiling behaviour of the multi-constituent substance is expected to be comparable to the properties of the read-across substances. Therefore, decomposition of the substance at elevated temperatures (> ca. 140 °C) before onset of boiling is expected. Further testing is not considered necessary.

Key value for chemical safety assessment

Additional information