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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:
12.05.2004-07.07.2004
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
Principles of method if other than guideline:
Due to the results of the study conducted according to guideline an additional experiment (capillary method: capillary tube in metal block) was carried out to determine the boiling point of the test item.
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Boiling pt.:
> 260 °C
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
260 °C

The boiling point of the test item was investigated in a study conducted according to OECD Guideline 103 and EU-Method A.2. (differential scanning calorimetry). Due to the course of the second endothermic effect and the observations during the determination of the thermal stability (see chapter 4.19) it was concluded that the test item has no boiling point at atmospheric pressure and the test substance decomposes prior to boiling. To verify these results an additional experiment (capillary method; one measurement) was conducted.

The following observations were made by the capillary method:

Endothermic effect

Set Point (°C)

Heating rate (K/min)

Endpoint (°C)

Boiling Point

Remarks

first

35

10

250

-

42°C: sintering of the test item

46°C: test item became transparent

65°C: liquefaction started

100°C: viscous

150°C: formation of small bubbles

second

250

5

350

-

260°C: test item became light brown

275°C: test item became dark brown

285°C: slow bubble formation

300°C: test item completely black, continuous bubbling observed

312°C: test item black, rapid continuous bubbling observed

Based on these observations it can be concluded that the test item decomposes at temperatures >=260°C and therefore a boiling point can not be determined at atmospheric pressure.

Conclusions:
The test item decomposes at temperatures >=260°C and therefore a boiling point can not be determined at atmospheric pressure.
Executive summary:

The boiling point of partially unsaturated TEA-Esterquat was investigated in a study conducted according to OECD Guideline 103 and EU-Method A.2. (differential scanning calorimetry) and in addition via the capillary method. Based on the results obtained it can be concluded that the test item decomposes at temperatures >=260°C and therefore a boiling point can not be determined at atmospheric pressure.

Description of key information

decomposition > 260°C (OECD TG 103 / EU method A.2); GLP; RL1

Key value for chemical safety assessment

Additional information

The boiling point of partially unsaturated TEA-Esterquat was investigated in a study conducted according to OECD Guideline 103 and EU-Method A.2. (differential scanning calorimetry) and in addition via the capillary method. Based on the results obtained it can be concluded that the test item decomposes at temperatures >=260°C and therefore a boiling point cannot be determined at atmospheric pressure.