Hexamethylene diisocyanate, trimers, reaction products with 2-hydroxyethyl acrylate

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:

23 Nov - 24 Nov 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

GLP guideline study

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

adopted in 2008

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

adopted in 2003

Qualifier:

according to guideline

Guideline:

other: DIN EN 14522 (2005) Determination of the Ignition Temperature of Gases and Liquids

GLP compliance:

yes (incl. QA statement)

Remarks:

Hess. Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany

Specific details on test material used for the study:

Storage conditions: Ambient temperature, keep container tightly closed, protected from sunlight

Auto-ignition temperature:

440 °C

Atm. press.:

>= 1 008.9 - <= 1 011.5 hPa

Remarks on result:

other: Regulation EC No. 440/2008 and DIN 51794: the auto-ignition temperature rounded down to the nearest multiple of 5°C was determined to be 440 °C.

Results
Preliminary Test
Table 1 displays the results, an ignition is denoted as “+” and no ignition is denoted as “-“. At each temperature, 5 drops were put into the Erlenmeyer flask. The atmospheric pressure was 1008.4 hPa.

Table 1 – Preliminary test results

	Preliminary test
Temperature [°C]	394	408	450	499	461	476
Ignition [+/-]	-	-	-	+	-	+

 

In the preliminary test, the lowest temperature at which an ignition occurred was 476 °C.

Main Test
Results are shown in Tables 2 and 3. An ignition is denoted as “+” and no ignition is denoted as “-“.

Table 2 – Determination of the first and second main test series

1^stmain test series			2^ndmain test series
Temperature [°C]	Droplets	Ignition	Temperature [°C]	Droplets	Ignition
470	4	+	453	10	+
458	10	+	450	10	+
451	9	-	449	10	-
454	10	+	448	9	-
450	9	-	448	8	-
452	10	-	448	7	+
451	8	-	445	7	+
451	7	-	442	7	-
450	6	-	442	10	-
450	5	-	441	9	-
450	4	-	441	8	-
450	3	-	441	6	-
451	2	-	441	5	-
450	1	-	442	4	-
--	--	--	441	3	-
--	--	--	441	2	-
--	--	--	442	1	-
Atmospheric pressure: 1009.1 hPa			Atmospheric pressure: 1008.9 – 1011.5 hPa

 

Table 3 – Determination of the third main test series

Temperature [°C]	Droplets	Ignition
443	7	-
444	10	-
443	9	-
442	8	-
442	6	-
443	5	-
443	4	-
442	3	-
442	2	-
442	1	-
445	10	+
Atmospheric pressure. 1011.5 hPa

 

The lowest temperatures at which an ignition occurred in the main test are shown in Table 4.

Table 4 – Lowest temperatures at which an ignition occurred

Main test series	Lowest temperatures of an ignition [°C]	Highest temperatures without an ignition [°C]	Atmospheric pressure [hPa]
1	454	451	1009.1
2	445	442	1008.9 – 1011.5
3	445	443	1011.5

 

Based on main test series results, the lowest auto-ignition temperature was 445 °C.
Regulation EC No. 440/2008 and DIN 51794: the auto-ignition temperature rounded down to the nearest multiple of 5°C was determined to be 440 °C.
DIN EN 14522: the auto-ignition temperature reduced by 1.5% and rounded to the nearest integer temperature was determined as 437 °C.

Description of key information

440 °C at 1008.9 to 1011.5 hPa (EU Method A.15.)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

440 °C