Amines, C12-16 alkyl dimethyl, reaction products with ethyl chloroacetate, 2-(2-aminoethylamino)ethanol and 2-propenoic acid

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study without detailed documentation

Reason / purpose for cross-reference:

read-across source

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

GLP compliance:

yes

Type of method:

differential thermal analysis

Boiling pt.:

°C

Decomposition:

yes

Decomp. temp.:

>= 180 °C

A preliminary thermographic measurement was performed over a temperature range from room temperature to 250 °C. The thermographic curve exhibits two ranges. Between room temperature and approximately 170 °C the sample lost 5.7 % of its weight; another 0.8 % was lost during purging before the start of the measurement. This weight loss was probably due to evaporation of strongly bound moisture.

Beginning at approximately 180 °C the mass loss rate increased steadily, reaching a maximum at approximately 227 °C. At the final temperature of 250 °C the sample was still continuously loosing mass. The mass loss between 170 and 250 °C was 24.7 %. The residue looked orange brown and blended.

The DSC measurement was performed twice:

To determine a possible boiling point more precisely a crucible lid with one hole of 50 µm was used in the first measurement. The small hole causes generation of a defined atmosphere at constant pressure inside the crucible and allows measurements at near equilibrium conditions, thus preventing evaporation of the test material before reaching the boiling point. The measurement was stopped at a temperature of approximately 250 °C after a sudden endothermic peak at 201 °C indicated a burst crucible. The course of the DSC curve suggests that at approximately 150 °C the small hole was clogged.

The second measurement was therefore performed in an "open" crucible with a pierced lid. The sample had lost approximately 64.9 % of of its mass at the end of the second measurement with a dark brown residue on the bottom of the crucible.

Conclusions:

At 180 °C an endotherm peak was observed which noisy shape indicates decomposition of the substance. There is no indication of a of a boiling point prior to decomposition.

Executive summary:

The boiling temperature of the substance was determined by differntial scanning calorimetry according to EU-method A.2 (Boiling temperature). No boiling point prior to decomposition was found.

Description of key information

No boiling point could be determined. The substance decomposes at temperatures >= 180 °C.