4-pentylcyclohexanone

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:

1990-08-23 to 1990-09-10

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))

Deviations:

no

GLP compliance:

no

Key result

Auto-ignition temperature:

250 °C

Atm. press.:

>= 1 001.25 - <= 1 010.58 hPa

At 250 °C no ignition was observed. At 255 °C 5 drops of the test substance ignited. Between this temperature and the temperature where no ignition was observed (250 °C), the amount of the sample was varied. In this way the optimal amount of sample at the lowest ignition temperature could be found out. This temperature is the lowest value of the first series. After each attempt the flask was cleaned by blowing compressed air into the hot flask.

 

The lowest value of the first series was 251°C (15 drops).

 

Lowest value of the main determination

To assure that the lowest value of the first series was not influenced by a residue of the sample a new clean flask was used for the main determination of the final lowest value. The final lowest value of the main determination was 250°C.

 

Repetition of the determination

In the temperature range of the lowest value of the main determination the determination was repeated with a new clean flask, until at least three lowest values of the main test and the repetition were in a span of 10°C as required by the DIN-guideline 51794. After each attempt the flask was cleaned by blowing compressed air into the hot flask.

 

The self-ignition temperature is the lowest value for ignition found in the main test and repetitions, rounded down to a multiple of 5 °C (safety margin), performed according to DIN 51794

 

Lowest value of the first series 251°C

Lowest value of the main determination 250 °C

Lowest value of the repetition 251 °C

each with 15 drops of test substance.

 

The lowest value is the one of the main determination (250°C).

Conclusions:

The self-ignition temperature of the test item was determined to be 250 °C.

Executive summary:

A study was conducted according to Regulation (EC) No 440/2008 Part A A.15 to determine the auto-ignition temperature of the test substance. In a preliminary test the approximately auto-ignition temperature were determined. For the main test three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 5 K until no ignition was observed. The test was repeated with slighter temperature steps to determine the auto-ignition temperature more accurate. According to criteria as laid down in DIN 51794 the auto ignition temperature is the lowest value out of three experiments rounded down to a whole multiple of 5 °C. Therefore the auto-ignition temperature was determined to be 250 °C. All three values lay within a range of 20 K.

Description of key information

The self-ignition temperature of the test item was determined to be 250 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

250 °C

Additional information

A study was conducted according to Regulation (EC) No 440/2008 Part A A.15 to determine the auto-ignition temperature of the test substance. In a preliminary test the approximately auto-ignition temperature were determined. For the main test three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 5 K until no ignition was observed. The test was repeated with slighter temperature steps to determine the auto-ignition temperature more accurate. According to criteria as laid down in DIN 51794 the auto ignition temperature is the lowest value out of three experiments rounded down to a whole multiple of 5 °C. Therefore the auto-ignition temperature was determined to be 250 °C. All three values lay within a range of 20 K.