Tributyl borate

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

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

Qualifier:

according to guideline

Guideline:

DIN EN 14522, Method P (Determination of the auto ignition temperature of gases and vapours)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

290 °C

Atm. press.:

970.2 - 990.4 hPa

Preliminary Test

An approximate value of the ignition temperature of the test item was first determined by a preliminary test. Table 1gives the result of the preliminary test. An ignition is denoted as “+” and no ignition is denoted as “-“. 5 drops were put into the Erlenmeyer flask at each temperature.

Table 1:   Results of the preliminary test

Preliminary Test
Temperature / °C	Ignition / +/-
203	-
251	-
305	-
356	+
345	+
334	+
325	+
314	+
307	-
Atmospheric pressure: 996.0 - 1009.7 hPa

In the preliminary test, the lowest temperature at which an ignition occurred was 314 °C.

Main Test

The lowest temperatures at which an ignition occurred in the main test are given in Table 2.

Table2:    Lowest temperatures at which an ignition occurred

Main test series	Lowest temperatures of an ignition	Highest temperatures without an ignition	Atmospheric Pressure
1	297 °C	294 °C	991.5 – 105.5 hPa
2	294 °C	290 °C	970.2 – 990.4 hPa
3	295 °C	291 °C	993.0 hPa

Based on results of the main test series, the lowest auto-ignition temperature was 294 °C.

Regulation EC No. 440/2008 and DIN 51794: The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined as 290 °C.

For information: DIN EN 14522: The auto-ignition temperature reduced by 1.5 % and rounded to the nearest integer temperature was determined as 289 °C.

Conclusions:

auto-ignition temperature: 290 °C

Executive summary:

The test item Tributyl borate has an auto-ignition temperature of 290 °C according to Regulation EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Determination of Ignition Temperature.

Description of key information

auto-ignition temperature of Tributyl borate: 290 °C at 970.2 - 990.4 hPa [according to EU Method A.15 and DIN 51794 (2003)]

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

290 °C

Additional information

According to DIN EN 13463-1 the substance Tributyl borate has to be assigned to temperature class T3.