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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From June 19, 2012 to August 27, 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
- Name of test substance (as cited in study report): Amides, C16-18 (even numbered), N-hydroxyethyl (CAS Number: 111-57-9)
- Molecular formula: C20H41NO2
- Molecular weight: 327.54
- Physical state: Cream powder
- Batch: 5103033
- Purity: Not indicated by the sponsor; treated as 100% pure
- Test substance storage: At room temperature in the dark
- Expiry date: 11 January 2013
Remarks on result:
other: The boiling point of the test substance could not be determined as it decomposes before boiling at >275°C.

Results:

Preliminary test

From 250°C upwards the weight of the sample decreased significantly. At 372°C the sample weight had decreased by 25%.

 

After the experiment, a brown molten residue remained in the sample container (original colour: cream). The change of the colour indicated reaction and/or decomposition of the test substance.

 

Main study

An endothermic melting peak between 50°C and 115°C was observed and an endothermic effect was observed from 275°C. This effect was most likely obtained due to reaction and/or decomposition of the test substance. After the experiment, a light yellow molten residue remained in the sample container.

Conclusions:
The boiling point of the test substance could not be determined as it decomposed before boiling at >275 °C. Hence, in accordance with Annex VII column 2 adaptation of REACH, the boiling point study does not need to be conducted.
Executive summary:

A study was conducted to determine the boiling point of the test substance using differential scanning calorimetry (DSC) according to the standard EU A.2, OECD 103, and EPA OPPTS 830.7220 guidelines as well as GLP.

Reaction and/or decomposition of the test substance was observed at temperatures of >275°C (> 548K). Boiling of the test substance was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test substance has no boiling temperature. Hence, in accordance with Annex VII column 2 adaptation of REACH, the boiling point study does not need to be conducted.

Description of key information

The boiling point was determined according to EU Method A.2, OECD Guideline 103 and EPA OPPTS Guideline 830.7220 (Baltussen, 2012).

Key value for chemical safety assessment

Additional information

Boiling of the test substance was not observed below the temperature at which reaction and/or decomposition started.