[trans(trans)]- 4-Methyl-4'-propyl-1,1'-bicyclohexyl

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:

15 - 21 Nov 2017

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))

GLP compliance:

no

Key result

Auto-ignition temperature:

225 °C

Atm. press.:

1 013 hPa

Preliminary test

Temperatures where auto-ignition was detected are marked with +; temperatures where no auto-ignition was detected are marked with -. The amount of test item tested at each measurement is indicated as numbers of portions (i.e. drops).

Table 1:

T/ °C	portions	+/-	Time lag/s
207	5	-	-
257	5	+	25
237	5	+	42
217	5	-	-
227	5	-	-
232	5	-	-

Barometric pressure: 1020.8 hPa

The lowest auto-ignition temperature of the test item was determined to be 237 °C in the preliminary test.

Main test

Table 2: Auto-ignition temperature (1st main test, part 1)

1^stmain test (5 K steps)
T/ °C	portions	+/-	Time lag/ s
237	5	+	66
232	5	+	69
227	5	+	105
222	5	-	-
222	10	-	-
222	1	-	-
222	9	-	-
222	2	-	-
222	8	-	-
222	3	-	-
222	7	-	-
222	4	-	-
222	6	-	-

Barometric pressure: 1018.8 hPa

Table 3: Auto-ignition temperature (1st main test, part 2)

1^stmain test (2 K steps)
T/ °C	portions	+/-	Time lag/ s
227	5	-	-
229	5	+	81
227	5	+	104
225	5	-	-
225	10	-	-
225	1	-	-
225	9	-	-
225	2	-	-
225	8	-	-
225	3	-	-
225	7	-	-
225	4	-	-
225	6	-	-

Barometric pressure: 1019.8 hPa

Table 4: Auto-ignition temperature (2nd main test)

2nd main test (2 K steps)
T/ °C	portions	+/-	Time lag/ s
227	5	-	-
229	5	-	-
231	5	+	90
229	5	+	115
227	10	-	-
227	1	-	-
227	9	-	-
227	2	-	-
227	8	-	-
227	3	-	-
227	7	-	-
227	4	-	-
227	6	-	-

Barometric pressure: 1014.9 hPa

Table 5: Auto-ignition temperature (3rd main test)

3rd main test (2 K steps)
T/ °C	portions	+/-	Time lag/ s
229	5	+	102
227	5	-	-
227	10	+	45
225	10	-	-
225	1	-	-
225	9	-	-
225	2	-	-
225	8	-	-
225	3	-	-
225	7	-	-
225	4	-	-
225	6	-	-
225	5	-	-

Barometric pressure: 1007.6 hPa

Table 6: Summary

Main test series	Auto-ignition temperature/ °C	Time lag/ s
1^stmain test (5 K)	227	105
1^stmain test (5 K)	227	104
2^ndmain test (2 K)	229	115
3^rdmain test (2 K)	227	45

The lowest auto.ignition temperature of the test item was determined to be 227 °C in the main test. Due to safety reasons and according to the Guidelines the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5, giving a value of 225 °C.

Conclusions:

The auto-ignition temperature of the test item was determined to be 225 °C.

Executive summary:

The auto-ignition temperature of the test item was determined according to the European Commission Regulation (EC) No 440/2008, Method A.15. In apreliminary test the starting temperature for the main test was determined. The lowest auto-ignition temperature of the test item was determined to be 237 °C in the preliminary test and was used as starting point for the main test.

The lowest auto-ignition temperature of the test item was determined to be 227 °C in the main test. Due to safety reasons and according to the Guidelines the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5, giving a value of 225 °C.

Description of key information

The auto-ignition temperature of the test item was determined to be 225 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

225 °C

Additional information

The auto-ignition temperature of the test item was determined according to the European Commission Regulation (EC) No 440/2008, Method A.15. In apreliminary test the starting temperature for the main test was determined. The lowest auto-ignition temperature of the test item was determined to be 237 °C in the preliminary test and was used as starting point for the main test.

The lowest auto-ignition temperature of the test item was determined to be 227 °C in the main test. Due to safety reasons and according to the Guidelines the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5, giving a value of 225 °C.