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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-08-29 - 2018-10-10
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))
Version / remarks:
31 May 2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Specific details on test material used for the study:
The test item was stored in a tightly closed vessel at room temperature (17.8 - 22.1 °C).
Key result
Auto-ignition temperature:
310 °C
Remarks on result:
other: no atm. press. stated in study report

DETERMINATION OF 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.

RESULT

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

The following lowest values were recorded:

Table: Lowest values main test

Experiment   Value  Ignition delay  Drops used
 First test series  312 °C  5 s  8
 Second test series  312 °C  10 s  12
 Third test series  310 °C  3 s  4

The lowest value of the auto ignition temperature is 310 °C. This value was determined using 4 drops test item. The test item showed auto ignition after 3 seconds.

The auto ignition temperature (result of repeated determinations) is the lowest value from the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto ignition temperature is stated as 310 °C.

VALIDITY

In the DIN, the following limits are applied to the range of lowest values which may be used for evaluation: > 300 °C: difference between three values of the main test max. 10 K.

The three lowest values of the main test lay within a range of 10 K (as required for auto ignition temperatures above 300 °C). The largest difference between measured ignition temperatures was 2 K.

DISCUSSION

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 of Hydroxyaceton is stated as 310 °C.
Executive summary:

The auto ignition temperature was determined in three independent determinations under GLP-conditions according to EU A.15 method.. 310° C was the lowest value obtained in these determinations. The auto-ignition temperature of Hydroxyaceton was rounded down to a whole multiple of 5 °C and is stated as 310 °C.

Description of key information

The auto ignition temperature was determined in three independent determinations under GLP-conditions according to EU A.15 method. 310° C was the lowest value obtained in these determinations. The auto-ignition temperature of Hydroxyaceton was rounded down to a whole multiple of 5 °C and is stated as 310 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
310 °C

Additional information

Tests were performed at room conditions. No atm. press. was stated for the result. But it is assumed that a pressure of 101 325 Pa is applicable for the result and therefore for chemical safetey assessment.