Methyl 2-[(2-methylundecylidene)amino]benzoate

Auto flammability

Administrative data

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

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

Deviations:

yes

Remarks:

The Zündwertprüfer 10-212-000 instrument works with a program according to DIN EN14522. (norm not mentioned) It is possible that more ignition trials will be conducted using the EN 14522 because of 5°C steps instead of 2°C. (uncritical).

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Methyl 2-[(2-methylundecylidene)amino]benzoate

EC Number:

267-104-8

EC Name:

Methyl 2-[(2-methylundecylidene)amino]benzoate

Cas Number:

67800-80-0

Molecular formula:

C20H31NO2

IUPAC Name:

methyl 2-[(2-methylundecylidene)amino]benzoate

Test material form:

liquid

Results and discussion

Auto-ignition temperature (liquids / gases)

Key result

Auto-ignition temperature:

>= 300 °C

Atm. press.:

>= 998.8 - <= 1 008.9 mBar

Any other information on results incl. tables

1.1        

The ignition attempts of the first test series of the main determination are presented in the following table.

Table8.3‑a          Ignition attempts first test series

Selected T*		T Vessel		Drops used		Ignition?		Observations
°C		°C		#		yes/no
445.5		445.7		5		yes		Flame and Plop
440.5		440.4		5		yes		Flame and Plop
435.5		435.5		5		yes		Flame and Plop
430.5		430.7		5		yes		Flame and Plop
425.5		425.6		5		yes		Flame and Plop
420.5		420.4		5		yes		Flame and Plop
415.5		415.7		5		no		Smoke
415.5		415.4		7		no		Smoke
415.5		415.7		9		yes		Flame and Plop
413.5		413.7		5		yes		Flame and Plop
411.5		411.7		5		yes		Flame and Plop
409.5		409.7		5		yes		Flame and Plop
407.5		407.5		5		no		Smoke
407.5		408.0		7		no		Smoke
407.5		407.6		9		no		Smoke
407.5		407.5		13		no		Smoke
Result given by the instrument
-	409.41		5		yes after 21 seconds

 

*The selected temperature was suggested automatically by the Zündwertprüfer.

All ignition trials were conducted on 04. Dec. 2018 (atmospheric pressure during the trials 998.8 mbar). Lowest value of the first test series is 409.41 °C, the drops, which needed, are 5 and the time until the ignition was detected, are 21 seconds.

1.1        

The ignition attempts of the second test series of the main determination are presented in the following table.

Table8.4‑a          Ignition attempts second test series

Selected T*		T Vessel		Drops used		Ignition?		Observations
°C		°C		#		yes/no
429.4		429.5		5		yes		Flame and Plop
424.4		424.7		5		yes		Flame and Plop
419.4		420.0		5		yes		Flame and Plop
414.4		414.0		5		yes		Flame and Plop
409.4		409.5		5		no		Smoke
409.4		409.2		7		yes		Flame and Plop
407.4		407.4		7		no		Smoke
407.4		407.7		13		no		Smoke
407.4		407.5		9		no		Smoke
407.4		407.7		5		no		Smoke
Result given by the instrument
-	410.04		7		yes after 12 seconds

 

*The selected temperature was suggested automatically by the Zündwertprüfer.

The ignition trials were conducted on 05. Dec. 2018 (atmospheric pressure during the trials 1008.9 mbar).

Lowest value of the second test series is 410.04 °C, the drops, which needed, are 7 and the time until the ignition was detected, are 12 seconds.

1.1        

The ignition attempts of the third test series of the main determination are presented in the following table.

Table8.5‑a          Ignition attempts third test series

Selected T*		T Vessel		Drops used		Ignition?		Observations
°C		°C		#		yes/no
430.0		430.1		5		yes		Flame and Plop
425.0		425.2		5		yes		Flame and Plop
420.0		420.2		5		yes		Flame and Plop
415.0		414.8		5		yes		Flame and Plop
410.0		410.2		5		no		Smoke
410.0		410.4		7		no		Smoke
410.0		410.2		9		yes		Flame and Plop
408.0		408.1		9		yes		Flame and Plop
406.0		405.8		9		no		Smoke
406.0		406.3		13		yes		Flame and Plop
404.0		404.2		13		no		Smoke
404.0		404.1		5		no		Smoke
404.0		404.2		7		no		Smoke
404.0		404.0		9		no		Smoke
Result given by the instrument
-	406.12		13		yes after 20 seconds

 

*The selected temperature was suggested automatically by the Zündwertprüfer.

All ignition trials were conducted on 06. Dec. 2018 (atmospheric pressure during the trials 1002.6 mbar). Lowest value of the third test series is 406.12 °C, the drops, which needed, are 13 and the time until the ignition was detected, are 20 seconds.

1.1        

The requirements for repeatability of the DIN standard are stated as follows: Three lowest values of the main test have to lie within a range of 10 K (if auto ignition temperature is above 300 °C).

The following lowest values were recorded:

Table9.1‑a          Lowest Values Main Test

Experiment	Value (rounded to integer)	Ignition delay	Drops used
First test series	409 °C	21 s	5
Second test series	410 °C	12 s	7
Third test series	406 °C	20 s	13

 

The lowest value of the auto ignition temperature is 406 °C. This value was determined using 13 drops test item. The test item showed auto ignition after 20 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 405 °C.

1.2        

In the DIN, the following limits are applied to the range of lowest values which may be used for evaluation:

Table9.2‑a          Acceptable ranges

Auto ignition temp.	Range
> 300 °C	difference between three values of the main test max. 10 K

 

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 measuredignitiontemperatures was 4 K.

1        Discussion

The study was conducted according to procedure and demands of EU-Method A.15 and DIN 51794. The acceptable range which is demanded in the DIN standard was fulfilled.

All measured values show good correlation. No observations were made which might cause doubts concerning the validity of the study outcome.

2        Deviations

2.1        Deviations from the Study Plan

No deviations from the study plan were ascertained.

2.2        Deviations from the Guideline

The following deviation from the Guideline was ascertained:

TheZündwertprüfer 10-212-000instrument works with a program according to DIN EN14522.

This is a deviation from the EU-Method A.15 “Auto Ignition Temperature (liquids and gases)” as this norm is not mentioned there. An additional deviation occurs, as the method describes, that after one variation of drops the 2°C test modus will start, even when an ignition has occurred (cf. the orange mark in the schema). In the DIN method 51794 steps of 5°C are proposed in this case. As shown in the schema above the endpoint of the different guidelines is the same. It is possible that more ignition trials will be conducted using the EN 14522. Therefore, this can be considered as uncritical.

Applicant's summary and conclusion

Conclusions:

The lowest value of the auto ignition temperature is 406 °C. This value was determined using 13 drops test item. The test item showed auto ignition after 20 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 405 °C.

Executive summary:

Theauto ignition temperaturewas determined in three independent determinations. A lowest value of the main test of 406 °C was found.

Therefore, the auto-ignition temperature according to EU A.15 (rounded down to a whole multiple of 5 °C) ofMethyl 2-[(2-methylundecylidene)amino]benzoateis stated as 405 °C.