[2-(2-methoxyethoxy)ethoxy]acetic acid

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:

from 2017-10-09 to 2018-

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))

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Batch No.: 08/2016_R_JM
Purity: 97.5 %

Key result

Auto-ignition temperature:

320 °C

Atm. press.:

>= 991 - <= 1 006 hPa

Pre-Test

Table 1. Results from the pre-test

Selected T*	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	yes/no
300	200.4	5	no	smoke
300	220.2	5	no	smoke
300	242.0	5	no	smoke
300	263.4	5	no	smoke
300	284.3	5	no	smoke
300	304.5	5	no	smoke
300	327.5	5	no	smoke
300	348.6	5	no	smoke
300	371.3	5	no	smoke
300	392.5	5	yes	Plop, ignition after 25 s

Using a constant heating rate, the subsequent ignition trials were conducted every 20 ± 5 K. Atmospheric pressure during the pre-test was 99859 Pa.

First Test Series

Table 2. Results from the first test series

Used program	Selected T*	T Vessel	Drops used	Ignition?	Observations
	°C	°C	#	yes/no
H-A1	391	391.0	5	yes	Flame and plop, ignition after 9 s
H-A1	386	386.4	5	yes	Flame and plop, ignition after 9 s
H-A1	381	381.4	5	yes	Small flame and plop, ignition after 19 s
H-A1	376	376.4	5	yes	Small flame and plop, ignition after 8 s
H-A1	371	371.4	5	no	-
H-A1	371	370.9	9	yes	Two flames and plop, ignition after 5 s
H-A1	366	365.8	9	yes	Flame and plop, ignition after 7 s
H-A1	361	360.7	9	yes	Flame and plop, ignition after 24 s
H-A1	356	356.3	9	yes	Flame and plop, ignition after 5 s
H-A1	351	350.8	12	yes	Flame and plop, ignition after 21 s
H-A1	346	345.7	12	yes	Flame and plop, ignition after 11 s
H-A1	341	341.0	12	yes	Plop, ignition after 19 s
H-A1	336	335.7	12	yes	Small flame and plop, ignition after 20 s
H-A1	331	331.1	12	yes	Small flame and plop, ignition after 17 s
H-A1	326	326.3	12	no	smoke
H-A1	326	325.8	8	no	smoke
H-A1	326	326.1	4	no	smoke
H-A1	326	326.3	16	no	smoke
H-A1	326	326.3	20	no	smoke
H-A2	329	329.1	12	no	smoke
H-A2	329	328.8	8	no	smoke
H-A2	329	329.0	4	no	smoke
H-A2	329	329.1	16	no	smoke
H-A2	329	328.9	20	yes	Flame and plop, ignition after 19 s
H-A2	327	326.8	20	yes	Flame and plop, ignition after 24 s
H-A2	325	324.8	20	no	smoke
H-A2	325	325.1	16	no	smoke
H-A2	325	325.1	12	no	smoke
H-A2	325	325.3	8	no	smoke
H-A2	325	325.0	4	no	smoke

* The selected temperature was suggested automatically by the ZPA3.

 

The first nine ignition trials were conducted atatmospheric pressure of 99826 Pa and the other ones at atmospheric pressure of 100648 Pa. Lowest value of the first test series is 327 °C.

 

Second Test Series

Table 3. Results from the second test series

Used program	Selected T*	T Vessel	Drops used	Ignition?	Observations
	°C	°C	#	yes/no
H-A1	336	336.3	12	yes	Flame and plop, ignition after 11 s
H-A1	331	331.4	12	yes	Flame and plop, ignition after 30 s
H-A1	326	326.1	12	no	smoke
H-A1	326	325.8	8	no	smoke
H-A1	326	326.1	4	no	smoke
H-A1	326	325.8	16	yes	Flame and plop, ignition after 19 s
H-A1	321	320.8	16	no	smoke
H-A1	321	320.7	12	no	smoke
H-A1	321	320.9	8	no	smoke
H-A1	321	321.4	4	no	smoke
H-A1	321	321.1	20	no	smoke
H-A2	324	323.6	16	yes	Flame and plop, ignition after 11 s
H-A2	322	321.8	16	no	smoke
H-A2	322	321.9	12	no	smoke
H-A2	322	321.7	8	no	smoke
H-A2	322	322.2	4	no	smoke
H-A2	322	321.8	20	no	smoke

* The selected temperature was suggested automatically by the ZPA3.

The first thirteen ignition trials were conducted at atmospheric pressure of 99747 Pa and the other ones at atmospheric pressure of 99434 Pa. Lowest value of the second test series is 324 °C.

 

Third Test Series

Table 4. Results from the third test series

Used program	Selected T	T Vessel	Drops used	Ignition?	Observations
	°C	°C	#	yes/no
H-A1	331	330.6	16	yes	Flame and plop, ignition after 10 s
H-A1	326	326.3	16	no	smoke
H-A1	326	326.1	12	no	smoke
H-A1	326	326.2	8	no	smoke
H-A1	326	325.8	4	yes	Flame, ignition after 14 s
H-A1	321	320.8	4	no	smoke
H-A1	321	320.8	8	yes	Flame and plop, ignition after 13 s
H-A1	316	316.1	8	no	smoke
H-A1	316	315.7	4	no	smoke
H-A1	316	315.9	12	no	smoke
H-A1	316	315.6	16	no	smoke
H-A1	316	316.4	20	no	smoke
H-A2	319	318.6	8	no	smoke
H-A2	319	318.7	4	no	smoke
H-A2	319	318.6	12	no	smoke
H-A2	319	318.8	16	no	smoke
H-A2	319	319.2	20	no	smoke

*The selected temperature was suggested automatically by the ZPA3.

 

The first fourteen ignition trials were conducted at atmospheric pressure of 99434 Pa and the other ones at atmospheric pressure of 99078Pa. Lowest value of the third test series is 321 °C.

Table 5. Summary results

Experiment	Value	Ignition delay	Drops used
First test series	327 °C	24 s	20
Second test series	324 °C	11 s	16
Third test series	321 °C	13 s	8

 

The lowest value of the auto-ignition temperature is 321 °C. This value was determined using 8 drops of the test item. The test item showed auto-ignition after 13 seconds. The auto-ignition temperature (result of determination) is the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto-ignition temperature is stated as 320 °C.The three lowest values of the main test lay within a range of 10 K (as required for auto-ignition temperatures above 300 °C). The largest difference between measured ignition temperatures was 6 K. Therefore, the test is considered as valid.

Conclusions:

The auto-ignition temperature of the test item was determined to be 320 °C.

Executive summary:

A study was conducted according to Regulation (EC) No 440/2008 Part A.15 and DIN 51794 (2003) to determine the auto-ignition temperature of the test substance. In a preliminary test the approximate auto-ignition temperature was determined. For the main test three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 2 - 5 °C until no ignition was observed. According to criteria laid down in Regulation EC No. 440/2008 method A.15 and DIN 51794 the auto-ignition temperature is the lowest value rounded down to a whole multiple of 5 °C. Therefore, the auto-ignition temperature was determined to be 320 °C at 991 -1006 hPa.

Description of key information

The auto-ignition temperature of the test item was determined to be 320 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

320 °C

Additional information

A study was conducted according to Regulation (EC) No 440/2008 Part A.15 and DIN 51794 (2003) to determine the auto-ignition temperature of the test substance. In a preliminary test the approximate auto-ignition temperature was determined. For the main test three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 2 - 5 °C until no ignition was observed. According to criteria laid down in Regulation EC No. 440/2008 method A.15 and DIN 51794 the auto-ignition temperature is the lowest value rounded down to a whole multiple of 5 °C. Therefore, the auto-ignition temperature was determined to be 320 °C at 991 -1006 hPa.