2-(N-methyl-p-toluidino)ethanol

Auto flammability

Administrative data

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

The following deviation from the Guideline was ascertained:
The Zündwertprüfer 10-212-000 instrument works with a program according to DIN EN14522.
This is a deviation from the EU-Method A.15 “Auto Ignition Temperature (liquids and gas-es)” 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 (see chapter 7), 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.

Deviations:

yes

Remarks:

see Version/remarks

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

2-(N-methyl-p-toluidino)ethanol

EC Number:

220-638-5

EC Name:

2-(N-methyl-p-toluidino)ethanol

Cas Number:

2842-44-6

Molecular formula:

C10H15NO

IUPAC Name:

2-[methyl(4-methylphenyl)amino]ethan-1-ol

Test material form:

liquid: viscous

Results and discussion

Auto-ignition temperature (liquids / gases)

Key result

Auto-ignition temperature:

410 °C

Atm. press.:

ca. 1 008.8 mBar

Any other information on results incl. tables

1.1     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:

Table9.1‑a      Lowest Values Main Test

Experiment	Value (rounded to integer)	Ignition delay	Drops used
First test series	413 °C	27 s	5
Second test series	412 °C	12 s	5
Third test series	412 °C	27 s	5

 

The lowest value of the auto ignition temperature is 412°C. This value was determined using 5 drops test item. The test item showed auto ignition after 12 respectively 27 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 410 °C.

1.2     Validity

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 measured ignition temperatures was 1 K.

Applicant's summary and conclusion

Conclusions:

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.
The auto ignition temperature was determined in three independent determinations. A lowest value of the main test of 412 °C was found.
Therefore, the auto-ignition temperature according to EU A.15 (rounded down to a whole multiple of 5 °C) of N-(2-Hydroxyethyl)-N-Methyl-p-Toluidine (MHPT) is stated as 410 °C.

Executive summary:

The auto-ignition temperature was determined in three independent determinations. A lowest value of the main test of 412 °C was found. Therefore, the auto-ignition temperature according to EU A.15 (rounded down to a whole multiple of 5 °C) of N-(2-Hydroxyethyl)-N-Methyl-p-Toluidine (MHPT) is stated as

 410 °C.