Dimethyloctadecyl(3-sulphopropyl)ammonium hydroxide

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2021

Report date:

2021

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

GLP compliance:

no

Type of method:

differential scanning calorimetry

Test material

Test material information

1

Reference substance name:

Dimethyloctadecyl(3-sulphopropyl)ammonium hydroxide

EC Number:

236-124-9

EC Name:

Dimethyloctadecyl(3-sulphopropyl)ammonium hydroxide

Cas Number:

13177-41-8

Molecular formula:

C23H49NO3S

IUPAC Name:

dimethyl(octadecyl)(3-sulfopropyl)azanium hydroxide

Test material form:

solid

Results and discussion

Melting / freezing point

Melting / freezing pt.:

> 263 °C

Decomposition:

yes

Decomp. temp.:

> 263 °C

Remarks on result:

other: Atm. press not reported

Any other information on results incl. tables

Three DSC measurements were carried out. In all measurements, endothermic events between 83.28 °C and 220.93 °C were detected. This could be a sign of splitting of a chemical compound, as no signs of melting were seen during the pre-test and when the second crucible was opened.

Afterwards at measurement 1 and 3 from 263.50 °C, an endothermic event with zigzag peaks can be seen, according to the pre-test this can be indicated as melting under decomposition.

The boiling in the pre-test could be a boiling point of the decomposition product.

Since the test item melts under decomposition, no boiling point can be determined under these test circumstances.

All results were evaluated with Event Marker and, for safety reasons, the beginning of the melting point under decomposition is given with the lowest value.

Applicant's summary and conclusion

Conclusions:

For the test substance the beginning of melting under decomposition is stated as 263.50 °C (536.656 K). No boiling point of the test substance under these test circomstances could be determined as the test substance decomposed during melting. No boiling point of the test substance Stearyl Sulfobetaine under these test circomstances could be determined as the test substance decomposed during melting.

Executive summary:

The determination of the melting and boiling point of Stearyl Sulfobetaine was performed via DSC (differential scanning calorimetry). Two phases of the endothermic events were detected. The first phase should be a sign of splitting of a chemical compound. The second phase can be indicated as melting under decomposition.