Sodium 2-(1-carboxylatoethoxy)-1-methyl-2-oxoethyl isooctadecanoate

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-03-23 to 2018-08-23

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point/Boiling Range)

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

GLP compliance:

no

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

- Test item: Pationic ISL
- CAS No.: 66988-04-03
- Molecular weight: 450.59 g/mol
- Sum formula: C24H43O6Na
- Identity: 67.8% acid value, 213 saponification value
- Physical state: Yellow viscous liquid
- Storage: 10 °C - 30 °C

Key result

Boiling pt.:

240 °C

Atm. press.:

1 013.3 hPa

Decomposition:

yes

Decomp. temp.:

>= 240 °C

DSC measurement in aluminium crucibles with a hole showed an ambiguous endothermal effect in the temperature range of 250-330 °C (Table 1). Directly after the endothermal effect an exothermal effect started. The mass loss after the DSC measurement amounted to 78%.

Table 1: Boiling point (DSC measurement)

DSC run	Weigh-in / mg	Starting temperature / °C	Final test temperature / °C	Temperature range (endothermal) / °C	Onset (boiling) / °C	Crucible	Observations after the measurement
1	13.65	25	500	250 -330	ambiguous	Aluminium with hole	Mass loss 78%

Due to the ambiguous course an additional measurement with the capillary method was performed. Since this measurement was performed only as a verifying screening a high heating rate of 10 K/min was chosen and therefore the absolute temperature values derived with the capillary method are not as accurate as the DSC results. The filling height of the test item was approx. 5 mm. The results are summarised in Table 2.

Table 2: Results of the capillary method

No.	Set point / °C	Heating rate / K/min	End point / °C	Remarks
1	200	10	350	Approx. 240 °C: Starting formation of bubbles Approx. 255 °C: Increasing formation of bubbles Approx. 285 °C: Discolouration to yellow-orange Approx. 299 °C: Increasing formation of bubbles and discolouration to orange Approx. 320 °C: Discoloured to brown Approx. 330 °C: Boiling Approx. 350 °C: Discolouration to dark brown and decreasing formation of bubbles

Under consideration of the results from the DSC measurements and the capillary method it was concluded that the test item boiled partially under decomposition starting at 240 °C.

Conclusions:

The test item started to boil under decomposition at 240 °C under atmospheric pressure (1013.3 hPa).

Executive summary:

The boiling point of the test item was investigated by DSC measurement according to OECD 103 and confirmed by capillary method. The test item started to boil under decomposition at 240 °C under atmospheric pressure (1013.3 hPa).

Description of key information

The boiling point of the test item was investigated by DSC measurement according to OECD 103 and confirmed by capillary method. The test item started to boil under decomposition at 240 °C under atmospheric pressure (1013.3 hPa).

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

240 °C