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Auto flammability

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Reference
Endpoint:
auto-flammability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015-04-23 to 2015-04-29
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:
dated 31 May 2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: DIN 51794 - Testing of mineral oil hydrocarbons - Determination of ignition temperature
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
LAUS GmbH Auf der Schafweide 20 D-67489 Kirrweiler Germany
Key result
Auto-ignition temperature:
430 °C
Atm. press.:
1 013.25 hPa

Pre-Determination

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

Ignition attempts pre-test

 

Selected T*

T Vessel

Drops used

Ignition?

Observations

°C

°C

#

yes/no

 

300

200.1

5

no

-

300

222.1

5

no

Fume

300

246.0

5

no

Fume

300

266.7

5

no

Fume

300

290.1

5

no

Fume

300

312.3

5

no

Fume

300

338.7

5

no

Fume

300

365.0

5

no

Fume

300

387.1

5

no

Fume

500

404.2

5

no

Fume

500

421.4

5

no

Fume

500

442.7

5

yes

Flame and plop after 15 s

 

 The temperature was selected at the ZPA3 corresponding to an initial oven temperature of 200 °C. As the test item showed no ignition at 387.1 °C, a higher temperature was selected for the subsequent ignition trials corresponding to a new initial oven temperature of 400 °C. Using a constant heating rate, the subsequent ignition trials were conducted every 20 ± 5 K

 

Main Study

The requirements for repeatability of the DIN 51794 standard are stated as follows: Three lowest values of the main study have to lie within a range of 10 K (if auto ignition temperature is below 300 °C) respectively 20 K (if auto ignition temperature is above 300 °C).

The following lowest values were recorded:

 

Table Lowest Values Main Study

Experiment

Value

Ignition delay

Drops used

First test series

431 °C

11 s

15

Second test series

433 °C

10 s

12

Third test series

433 °C

52 s

12

 

The lowest value of the auto ignition temperature is 431 °C. This value was determined using 15 drops test item. The test item showed auto ignition after 11 seconds.

Conclusions:
The auto ignition temperature of SIKA Hardener LPP was determined to be 430 °C at 1013.25 hPa.
Executive summary:

A study was to determine the auto-ignition temperature of the test item according to Regulation (EC) No 440/2008 method A.15 and DIN 51794 Three independent determinations were conducted. The auto-ignition temperature was determined to be 430 °C in all three replicates. According to the criteria as laid down in DIN 51794 the auto ignition temperature is the lowest value of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto ignition temperature is stated as 430 °C. The three lowest values of the main study lay within a range of 20 K. No observations were made which might cause doubts concerning the validity of the study outcome. Thus, the validation criteria were fulfilled.

Description of key information

 The autoignition temperature of the test item was determined to be 430 °C at 1013.25 hPa.

 

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
430 °C

Additional information

A study was to determine the auto-ignition temperature of the test item according to Regulation (EC) No 440/2008 method A.15 and DIN 51794 Three independent determinations were conducted.The auto-ignition temperature was determined to be 430 °C in all three replicates. According to the criteria as laid down in DIN 51794 the auto ignition temperature is the lowest value of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto ignition temperature is stated as 430 °C. The three lowest values of the main study lay within a range of 20 K. No observations were made which might cause doubts concerning the validity of the study outcome. Thus, the validation criteria were fulfilled.

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