Imidazolium compounds, 2-(C9-19 and C9-19-unsatd. alkyl)-1-[(C10-20 and C10-20-unsatd. amido)ethyl]-4,5-dihydro-1-Me, Me sulfates

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:

From September 01, 2017 to October 30, 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

not specified

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

not specified

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

ca. 23.5 °C

Atm. press.:

ca. 1 atm

Decomposition:

no

Remarks on result:

other: Average of 4 run studies

Results

Mass Used: 4.3 mg (test B), 5.4 mg (test C), 3.0 mg (test D), 4.5mg (test E)

Crucible Type: Aluminium (closed lid)

Temperature Range: 0°C – 150°C

Ramp Rate: 1 K.min^-1

Test Atmosphere: Nitrogen

	1^stEndotherm	2^ndEndotherm
	Run 1 (B)
Endotherm onset temperature (°C)	23.71	95.08
	Run 2 (C)
Endotherm onset temperature (°C)	23.41	100.44
	Run 3 (D)
Endotherm onset temperature (°C)	23.41	101.81
	Run 4 (E)
Endotherm onset temperature (°C)	23.45	97.14

Melting point: 23.5°C

 

Comment

The first endotherm occurred at approximately 23°C. It was thought that the first endotherm was due to the melting of the test substance. The second endotherm occurred at approximately 100°C, this could be associated with the loss of water or as the product is known to be of Unknown or Variable Composition, Complex Reaction Products and Biological Materials (UVCB Substance), it is possible that the second endotherm is due to the melting / boiling of a different component.

Conclusions:

Under study conditions, given that the second endotherm could indicate boiling of a different component of the test substance, the melting point of the test substance is considered to range from from 23.5 to 100°C.

Executive summary:

A study was conducted to determine the melting point of the test substance using Differential Scanning Calorimetry (DSC) according to EU Method A1 and OECD Guideline 102, in compliance with GLP. During the study, the first endotherm occurred at approximately 23°C, which was suspected to be due to the melting of the test substance. The second endotherm occurred at approximately 100°C, which was concluded by the study author to be either associated with the loss of water or due to the UVCB nature of the test substance, indicating the melting of a different component. The melting point of the test substance was concluded by the author to be 23.5°C. (Chilworth, 2017). Under study conditions, given that the second endotherm could indicate boiling of a different component of the test substance, the melting point of the test substance is considered to range from from 23.5 to 100°C.

Description of key information

The melting point of the test substance was determined using the Differential Scanning Calorimetry (DSC) method according to OECD Guideline 102 and EU Method A.1(Chilworth, 2017).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

23.5 °C

Additional information

Due to the UVCB nature of the test substance and multiple observed endotherms, the overall melting point of the test substance can be considered to range from 23.5 to 100 °C at 101325 Pa.