Phosphoric acid, mono- and di-C16-18 (even numbered) alkyl esters, salts with 2,2'-iminodiethanol

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

January 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Principles of method if other than guideline:

Pre-test and DSC

GLP compliance:

no

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

The following information of the test substance was provided by the sponsor.
Name
Fosfotex C16/18 DEA
Composition see Composition 1.2
Storage r
room temperature (20 ± 5 °C)

Key result

Melting / freezing pt.:

>= 47.09 - <= 75.35 °C

Atm. press.:

1 atm

Pre-test

The test substance melted to aclear colourless liquid. After cooling down the test substance was solidified as a white turbid solid like the original test substance.

DSC measurement

In both measurements an endothermic event with two peak maximum and a flat broad exothermic event were detected.

According to the pre-test for melting point the endothermic event can be considered as melting point. This was evaluated with Event Marker function and is indicated in the range.

The detected exothermic event can be interpreted as boiling under decomposition based on the observations of the boiling point pre-test, as well as the appearance of the sample in the crucible after the first measurement. The beginning of boiling under decomposition was evaluated with Event Marker function.

Results of the pre-test for melting range

Attempt	Selected temperature in °C*	Melting range in °C
1	100.0	60 - 75

DSC

Melting range	in °C	in K
1 Determination
Begin	48.08	321.23
End	74.52	347.67
2 Determination
Begin	47.09	320.24
End	75.35	348.50
Min	47.09	320.24
Max	75.35	348.50
Peak maximum melting range	in °C	in K
1 Determination
Peak max 1	58.88	332.03
Peak max 2	67.69	340.84
2 Determination		273.15
Peak max 1	59.62	332.77
Peak max 2	67.89	341.04
Min peak max 1	58.88	332.03
Min peak max 2	67.69	340.84

Conclusions:

MP: 47.09 - 75.35 °C

Executive summary:

The melting point of Fosfotex C16/18 DEA was determined in a pre-test and in a DSC, according to OECD 102, EU A.1, no-GLP.

The melting point was evaluated with Event Marker function and is indicated in the range from 47.09 °C to 75.35 °C (320.24 K to 348.50 K)

with the first peak maximum of 58.88 °C (332.03 K) and the second peak maximum of 67.69 °C (340.84 K)

These values represent the two independent determinations.

Description of key information

Melting point: 47.09  - 75.35 °C

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

62 °C

Additional information

The test was performed according to OECD guideline 102 and EC method A.1 and evaluated with Event Marker function.

The melting range of the test item was determined to be between 47.09 - 75.35 °C (320.24 K to 348.50 K).