Phosphoric acid, butyl ester, sodium salt

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:

2018-03-08 to 2018-03-09

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

Qualifier:

according to guideline

Guideline:

DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

380 °C

Atm. press.:

1 013.25 hPa

PreliminaryTest

An approximate value of the ignition temperature of the test item was first determined by a preliminary test. An ignition is denoted as “+” and no ignition is denoted as “-“. 5 drops were put into the Erlenmeyer flask at each temperature.

Results of the preliminary test

	Preliminary test
Temperature / °C	402	452	442	432	421	403
Ignition / +/-	-	+	+	+	+	-
	Atmospheric pressure: 991.4 hPa

In the preliminary test, the lowest temperature at which an ignition occurred was 421 °C.

 

MainTest

The lowest temperatures at which an ignition occurred in the main test are given below.

Lowest temperatures at which an ignition occurred

Main test series	Lowest temperatures of an ignition	Highest temperatures without an ignition	Atmospheric Pressure
1	386 °C	383 °C	989.4 - 996.9 hPa
2	384 °C	380 °C	996.0 - 996.9 hPa
3	384 °C	381 °C	996.0 hPa

Based on results of the main test series, the lowest auto-ignition temperature was 384 °C. The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined to be 380 °C.

 

Conclusions:

The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined as to be 380 °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 380 °C. All three values lay within a range of 20 K. Thus, the validation criteria were fulfilled. 

Description of key information

The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined as to be 380 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

380 °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 380 °C. All three values lay within a range of 20 K. Thus, the validation criteria were fulfilled.