Hexanal

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:

2018-08-29 - 2018-11-13

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:

31 May 2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

205 °C

Atm. press.:

>= 1 004.7 - <= 1 020.5 hPa

RESULTS

Determination of the viscosity

The test item was visually compared with the standard liquid Viscosity (50 mPa*s).The viscosity of the test item was below 50 mPa*s.

Pre-Determination

The ignition attempts of the pre-determination program leads to an auto-ignition temperature of 220 °C.

First Test Series

The ignition attempts of the first test series of the main determination (using programs H-A1 and H-A2) leads to an auto-ignition temperature of 206.2 °C.

Second Test Series

The ignition attempts of the second test series of the main determination leads to an auto-ignition temperature of 206.4 °C.

Third Test Series

The ignition attempts of the third test series of the main determination leads to an auto-ignition temperature of 207.1 °C.

DISCUSSION

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).

The lowest value of the auto ignition temperature is 206 °C. This value was determined using 5 drops test item. The test item showed auto ignition after 39 and 52 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 205°C.

The three lowest values of the main test lay within a range of 5 K (as required for auto ignition temperatures below 300 °C). The largest difference between measured ignition temperatures was 1 K.

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.

Conclusions:

The auto-ignition temperature is stated as 205°C.

Executive summary:

The auto-ignition temperature was determined in three independent determinations under GLP and according to EU Method A.15. A lowest value of the main test of 206 °C was found.

Therefore, the auto-ignition temperature according to guideline (rounded down to a whole multiple of 5 °C) of the test item is stated as 205°C.

Description of key information

The auto-ignition temperature was determined in three independent determinations under GLP and according to EU Method A.15. A lowest value of the main test of 206 °C was found.

Therefore, the auto-ignition temperature according to guideline (rounded down to a whole multiple of 5 °C) of the test item is stated as 205°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

205 °C

Additional information

Atmospheric pressure varies for the study from 1004.7 to 1020.5 hPa. So, assuming a standard atmospheric pressure of 1013.25 hP is applicable for the CSA.