Reaction mass of 2-ethylhexyl (3-isocyanato-4-methylphenyl)carbamate and 2-ethylhexyl (5-isocyanato-2-methylphenyl)carbamate and 2-ethylhexyl (3-isocyanato-2-methylphenyl)carbamate

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:

11. Sep. 2018 to 13. Sep. 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))

Version / remarks:

Commission Regulation (EC) No. 440/2008 of 30. May 2008 published on 31. May 2008, EU-Method A.15 “Auto Ignition Temperature (liquids and gases)“ (referring to DIN 51794 “Bestimmung der Zündtemperatur“, dated May 2003)

Deviations:

yes

Remarks:

See "Any other information" for details

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

No further details specified in the study report.

Key result

Auto-ignition temperature:

525 °C

Atm. press.:

> 1 002 - < 1 008 hPa

FINDINGS

 

Determination of the viscosity

The test item was visually compared with the standard liquid Viscosity (50 mPa*s). The viscosity of the test item was above 50 mPa*s.

 

Pre-Determination

Ignition range for pre-test 1

Selected T*	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	Yes/No
200	200.4		No	Smoke
300	300.3	5	No	Smoke
400	400.4	5	No	Smoke
500	500.2	5	No	Smoke
600	600.1	5	Yes	Flame and plopp
Results given by the instrument
-	600.0	5	Yes	-

 

The ignition attempts of the pre-determination program are presented in the following table.

Ignition attempts pre-test 2

Selected T*	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	Yes/No
500	500.1	5	No	Smoke
500	520.0	5	No	Smoke
500	540.4	5	Yes	Flame and plopp
Results given by the instrument
-	540.88	5	Yes

 

*The temperature was selected at the Zündwertprüfer 10-212-000 corresponding to an initial oven temperature of 500 °C. Using a constant heating rate, the subsequent ignition trials were conducted every 20 ± 5 K

The ignition trials were conducted on 11. Sep. 2018

Atmospheric pressure during the pre-test was 1008.50 hPa (=mbar).

 

First Test Series

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

Ignition attempts first test series

Selected T*	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	Yes/No
545.9	546.1	5	Yes	Flame and plopp
540.9	541.2	5	Yes	Flame and plopp
535.9	536.2	5	Yes	Flame and plopp
530.9	531.1	5	Yes	Flame and plopp
525.9	526.1	5	No	Smoke
525.9	526.0	9	Yes	Flame and plopp
523.9	524.0	5	No	Smoke
523.9	523.8	9	No	Smoke
523.9	523.8	13	No	Smoke
523.9	524.2	17	No	smoke
Results given by the instrument
-	526.21	9	Yes after 15 seconds	-

*The selected temperature was suggested automatically by the instrument.

 

The ignition trials were conducted on 11. Sep. 2018 (atmospheric pressure during the trials 1008.50 hPa (=mbar))

Lowest value of the first test series is 526.21 °C, the drops, which needed, are 9 and the time until the ignition was detected, are 15 seconds.

 

Second Test Series

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

Ignition attempts second test series

Selected T*	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	Yes/No
546.2	546.3	5	Yes	Flame and plopp
541.2	541.2	5	Yes	Flame and plopp
536.2	536.3	5	Yes	Flame and plopp
531.2	531.3	5	Yes	Flame and plopp
526.2	526.4	5	No	Smoke
526.2	526.2	9	No	Smoke
526.2	526.3	13	No	Smoke
526.2	526.5	17	No	Smoke
529.4	529.5	5	No	Smoke
529.4	529.6	9	Yes	Flame and plopp
527.4	527.7	5	Yes	Flame and plopp
525.4	525.6	5	Yes	Flame and plopp
523.4	523.6	5	No	Smoke
523.4	523.5	9	No	Smoke
523.9	523.8	13	No	Smoke
523.9	524.2	17	No	smoke
Results given by the instrument
-	526.21	9	Yes after 15 seconds	-

*The selected temperature was suggested automatically by the instrument.

 

The ignition trials were conducted on 12. Sep. 2018 (atmospheric pressure during the trials 1004.60 hPa (=mbar))

Lowest value of the first test series is 526.61 °C, the drops, which needed, are 5 and the time until the ignition was detected, are 10 seconds.

 

Third Test Series

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

Ignition attempts third test series

Selected T*	T Vessel	Drops used	Ignition?	Observations
°C	°C	#	Yes/No
545.6	545.4	5	Yes	Flame and plopp
540.6	540.6	5	Yes	Flame and plopp
535.6	535.7	5	Yes	Flame and plopp
530.6	530.5	5	Yes	Flame and plopp
525.6	525.6	5	No	Smoke
525.6	525.4	9	No	Smoke
525.6	525.5	13	No	Smoke
525.6	525.7	17	No	Smoke
527.1	527.1	5	Yes	Flame and plopp
525.1	525.2	5	No	Smoke
525.1	525.0	9	No	Smoke
525.1	525.1	13	No	Smoke
525.1	525.2	17	No	smoke
Results given by the instrument
-	527.02	5	Yes after 21 seconds	-

*The selected temperature was suggested automatically by the instrument.

 

The ignition trials were conducted on 13. Sep. 2018 (atmospheric pressure during the trials 1002.10 hPa (=mbar))

Lowest value of the first test series is 527.02 °C, the drops, which needed, are 5 and the time until the ignition was detected, are 21 seconds.

 

RESULT AND VALIDITY

Result

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 5 K (if auto ignition temperature is below 300 °C) respectively 10 K (if auto ignition temperature is above 300 °C).

The following lowest values were recorded:

Lowest Values Main Test

Experiment	Value (rounded to integer)	Ignition delay	Drops used
First test series	526.21 °C	15 s	9
Second test series	525.61 °C	10 s	5
Third test series	527.02 °C	21 s	5

 

The lowest value of the auto ignition temperature is 525.61 °C. This value was determined using 5 drops test item. The test item showed auto ignition after 10 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 525 °C.

Conclusions:

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 525 °C.

Executive summary:

Determination of the auto ignition temperature of Trixene AS according to EU A.15

 

Findings and Results:

The auto ignition temperature was determined in three independent determinations.

A lowest value of the main test of 525.61°C was found.

Therefore, the auto-ignition temperature according to EU A.15 (rounded down to a whole multiple of 5 °C) of Trixene AS is stated as 525 °C.

Description of key information

The auto-ignition temperature of Trixene AS is stated as 525 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

525 °C

Additional information

The auto ignition temperature was determined in three independent determinations.

A lowest value of the main test of 525.61°C was found.

Therefore, the auto-ignition temperature according to EU A.15 (rounded down to a whole multiple of 5 °C) of Trixene AS is stated as 525 °C.