N, N-bis-(2-hydroxyethyl) dimethyl ammonium methane sulfonate

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Study initiation date: 2021-02-02;
Experimental completion date: 2021-02-25

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))

Version / remarks:

European Commission Regulation (EC) No. 440/2008

Deviations:

no

Qualifier:

equivalent or similar to guideline

Guideline:

DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)

Version / remarks:

DIN 51794:2003-05

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

355 °C

Atm. press.:

1 023.9 hPa

Preliminary test
The following table shows the results of the preliminary test. Temperatures at which auto-ignition was detected are marked with +; temperatures where no auto-ignition was detected are marked with - in the table below. The amount of test item tested at each measurement is indicated as numbers of portions (i.e. drops).

Preliminary test
T / °C	portions	+ / -	Time lag / s
202	5	-	-
252	5	-	-
302	5	-	-
352	5	-	-
402	5	-	-
452	5	+	15
422	5	+	18
barometric pressure: 1026.5 hPa

The lowest auto-ignition temperature of the test item was determined to be 422 °C in the preliminary test.

The following tables show the results of the main tests. Temperatures at which auto-ignition was detected are marked with +; temperatures where no auto-ignition was detected are marked with - in the tables below. The amount of test item tested at each measurement is indicated as numbers of portions (i.e. drops).

Auto-ignition temperature (1st main test, part 1)

1^st main test (5 K steps)				1^st main test (5 K steps continued)
T / °C	portions	+ / -	Time lag / s	T / °C	portions	+ / -	Time lag / s
422	5	+	18	377^1	2	-	-
417	5	+	10	377^1	4	-	-
412	5	+	10	377^1	1	-	-
407	5	+	18	377^1	7	+	40
402	5	+	10	372^1	7	-	-
397	5	+	15	372^1	5	-	-
392	5	-	-	372^1	6	-	-
392	10	+	15	372^1	1	-	-
387	10	+	25	372^1	4	-	-
382	10	+	40	372^1	2	-	-
377	10	-	-	372^1	10	-	-
377	5	-	-	372^1	8	-	-
				372^2	3	-	-
				372^2	9	-	-
barometric pressure: 1016.6 hPa				^1barometric pressure: 1014.4 hPa ^2barometric pressure: 1007.9 hPa

Auto-ignition temperature (1st main test, part 2)

1^st main test (2 K steps)				1^st main test (2 K steps continued)
T / °C	portions	+ / -	Time lag / s	T / °C	portions	+ / -	Time lag / s
378	7	+	35	372^1	7	+	5
376	7	-	-	370^1	7	-	-
376	10	+	30	370^1	2	-	-
374	10	-	-	370^1	5	+	45
374	8	-	-	368^1	5	+	75
374	2	-	-	366^1	5	-	-
374	6	-	-	366^1	7	-	-
374	5	-	-	366^1	2	-	-
374	9	-	-	366^1	3	-	-
374	1	-	-	366^1	1	-	-
374	7	+	75	366^1	8	-	-
		-	-	366^1	10	-	-
				366^2	4	-	-
				366^2	6	-	-
				366^2	9	-	-
barometric pressure: 1015.0 hPa				^1barometric pressure: 1017.4 hPa ^2barometric pressure: 1017.7 hPa

Auto-ignition temperature (2nd main test)

2^nd main test (2 K steps)				2^nd main test (2 K steps continued)
T / °C	portions	+ / -	Time lag / s	T / °C	portions	+ / -	Time lag / s
369	5	+	60	363^1	10	+	40
367	5	-	-	361^1	10	+	70
367	7	+	23	359^1	10	-	-
365	7	-	-	359^2	5	-	-
365	1	-	-	359^2	3	-	-
365	4	-	-	359^2	1	-	-
365	3	-	-	359^2	7	-	-
365	5	+	40	359^2	2	-	-
363	5	-	-	359^2	4	-	-
363	7	-	-	359^2	6	-	-
363	1	-	-	359^2	8	-	-
363	3	-	-	359^2	9	-	-
barometric pressure: 1028.1 hPa				^1barometric pressure: 1027.2 hPa ^2barometric pressure: 1028.0 hPa

Auto-ignition temperature (3rd main test)

3^rd main test (2 K steps)				3^rd main test (2 K steps continued)
T / °C	portions	+ / -	Time lag / s	T / °C	portions	+ / -	Time lag / s
362	10	+	40	356	4	-	-
360	10	-	-	356	1	-	-
360	7	-	-	356	6	-	-
360	1	-	-	356	3	-	-
360	8	-	-	356	8	-	-
360	9	-	-	356	9	-	-
360	5	+	50	356	5	-	-
358	5	-	-
358	7	+	75
356	7	-	-
356	10	-	-
356	2	-	-
barometric pressure: 1023.9 hPa				barometric pressure: 1022.1 hPa

The results of the main test are compiled in the following table:

Main test series	Auto-ignition temperature / °C	Time lag / s
1^st main test (5 K)	377	40
1^st main test (2 K)	368	75
2^nd main test (2 K)	361	70
3^rd main test (2 K)	358	75

The lowest auto-ignition temperature of the test item was determined to be 358 °C in the main test. Due to safety reasons and according to the guidelines the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5, giving a value of 355 °C.

Conclusions:

Auto-ignition temperature (A.15; DIN 51794:2003-05) = 355 °C (1023.9 hPa)

Executive summary:

The auto-ignition temperature of the test item MAT-144 was determined in a reliable and valid study performed compliant with GLP according to EU method A.15 and closely following DIN 51794:2003-05.
After preliminary testing resulting in an indicative auto-ignition temperature of 422 °C, three main test series were performed, the first part of the first series in 5 K-steps, the second part of the first series as well as the second and third series in 2 K-steps.
The lowest ignition temperatures from each series are summarized in the table below:

Main test series	Auto-ignition temperature / °C	Time lag / s
1^st main test (5 K)	377	40
1^st main test (2 K)	368	75
2^nd main test (2 K)	361	70
3^rd main test (2 K)	358	75

The lowest auto-ignition temperature of the test item was determined to be 358 °C in the main test. Due to safety reasons and according to the guidelines, the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5, giving a value of 355 °C (1023.9 hPa).
The auto-ignition temperature of the test item MAT-144 according to the auto-ignition test conditions in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.15. was 355 °C.

Description of key information

Auto-ignition temperature (A.15; DIN 51794:2003-05) = 355 °C (1023.9 hPa)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

355 °C

Additional information

The auto-ignition temperature of the test item MAT-144 was determined in a reliable and valid study performed compliant with GLP according to EU method A.15 and closely following DIN 51794:2003-05.
After preliminary testing resulting in an indicative auto-ignition temperature of 422 °C, three main test series were performed, the first part of the first series in 5 K-steps, the second part of the first series as well as the second and third series in 2 K-steps.
The lowest ignition temperatures from each series are summarized in the table below:

Main test series	Auto-ignition temperature / °C	Time lag / s
1^st main test (5 K)	377	40
1^st main test (2 K)	368	75
2^nd main test (2 K)	361	70
3^rd main test (2 K)	358	75

The lowest auto-ignition temperature of the test item was determined to be 358 °C in the main test. Due to safety reasons and according to the guidelines, the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5, giving a value of 355 °C (1023.9 hPa).
The auto-ignition temperature of the test item MAT-144 according to the auto-ignition test conditions in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.15. was 355 °C.