Reaction mass of N,N,N',N'-tetrabutylmethylenediamine and dibutylamine

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:

21 April 2017 - 06 November 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Study was conducted in accordance with international guidelines and in accordance with GLP. All guideline validity criteria were met.

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

Regulation (EC) 440/2008 of 30 May 2008

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

2003

Qualifier:

according to guideline

Guideline:

DIN EN 14522, Method P (Determination of the auto ignition temperature of gases and vapours)

Version / remarks:

2005

Qualifier:

according to guideline

Guideline:

DIN EN 14522, Method S (Determination of the auto ignition temperature of gases and vapours)

Version / remarks:

2005

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

215 °C

Atm. press.:

>= 1 012 - <= 1 013.3 hPa

Remarks on result:

other:

Remarks:

In accordance with Regulation EC No. 440/2008 and DIN 51794 the lowest observed ignition temperature was rounded down to the nearest multiple of 5 °C. Therefore the auto-ignition temperature was determined to be 215 °C.

Table 1:       Results of the Preliminary Test

Temperature (°C)	202	251	242	232
Ignition (+/-)	-	+	+	-
Atmospheric pressure (hPa):	1012.8

An approximate value of the ignition temperature of the test item was first determined by a preliminary test. Table 1 gives the result of the preliminary test. An ignition is denoted as “+” and no ignition is denoted as “-“. 5 drops were put into the Erlenmeyer flask at each temperature.

Table 2:       Lowest Temperatures at Which Ignition Occured

Test Series	Lowest Ignition Temperature	Highest Temperature without Ignition	Atmospheric Pressure
	℃	℃	hPa
1	230	226	1011.3 – 1011.7
2	223	220	1009.5 – 1011.3
3	220	217	1012.0 – 1013.3

The lowest temperature at which an ignition was observed is independent of the number of drops of test item added.

Conclusions:

The test item has been determined to have an auto-ignition temperature of 215 °C at 1012.0 - 1013.3 hPa.

Executive summary:

EU Method A.15. – The auto-ignition temperature of the test item was determined using a procedure designed to be compatible with Method A.15. Auto-Ignition Temperature (Liquids and Gases) of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Following a preliminary test to establish an indicative auto-ignition temperature, aliquots of test item (1 – 10 drops) were added to the apparatus at the lowest auto-ignition temperature found in the preliminary test.  The temperature was decreased in intervals of 2 – 4 K.  This process was repeated until no ignition was observed.  At this temperature, the number of drops of test item added to the apparatus was varied.  Further tests were carried out where temperature and number of drops were varied to establish a temperature at which ignition was observed independent of the number of drops added.  Two further test series were then carried out in this temperature range to confirm the lowest temperature at which ignition was observed.  Once established, the auto-ignition temperature is regarded as the lowest temperature rounded down to the nearest multiple of 5 °C at which an ignition is observed in any of the main tests.

The auto-ignition temperature of the test item was determined to be 215 °C.

Description of key information

Auto-ignition temperature: 215 °C (488.15 K) at 1009.5 - 1013.3 hPa; EU Method A.15.; H Smeykal (2017)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

215 °C

Additional information

EU Method A.15. – The auto-ignition temperature of the test item was determined using a procedure designed to be compatible with Method A.15. Auto-Ignition Temperature (Liquids and Gases) of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Following a preliminary test to establish an indicative auto-ignition temperature, aliquots of test item (1 – 10 drops) were added to the apparatus at the lowest auto-ignition temperature found in the preliminary test.  The temperature was decreased in intervals of 2 – 4 K.  This process was repeated until no ignition was observed.  At this temperature, the number of drops of test item added to the apparatus was varied.  Further tests were carried out where temperature and number of drops were varied to establish a temperature at which ignition was observed independent of the number of drops added.  Two further test series were then carried out in this temperature range to confirm the lowest temperature at which ignition was observed.  Once established, the auto-ignition temperature is regarded as the lowest temperature rounded down to the nearest multiple of 5 °C at which an ignition is observed in any of the main tests.

The auto-ignition temperature of the test item was determined to be 215 °C.