Phosphorodithioic acid, O,O-di-dodecyl-esters, zinc salts, neutral and basic

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:

12 May - 26 May 2015

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))

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

adopted in 2003

GLP compliance:

yes (incl. QA statement)

Remarks:

Ministerium für Arbeit, Integration und Soziales des Landes Nordrhein-Westfalen, Düsseldorf, Germany

Specific details on test material used for the study:

Storage conditions: at room temperature; tightly closed; dry

Auto-ignition temperature:

305 °C

Atm. press.:

1 002 hPa

Results
Table 1 – Preliminary test results

Test no.	Sample volume [µL]	Barometric pressure [mbar]	T [°C]	Ignition delay [s]	Test result
1	150	1007	300	-	No ignition
2			320	10	Ignition
3			310	-	No ignition
4			315	-	No ignition
5			317	7	Ignition
6			316	11	Ignition

 

Result: Ignition at 316 °C, no ignition at 315 °C.

Table 2 – 1^st Main test series

Test no.	Sample volume [µL]	Barometric pressure [mbar]	T [°C]	Ignition delay [s]	Test result
1	150	1011	320	-	No ignition
2	300		320	8	Ignition
3	300		318	7	Ignition
4	300		316	-	No ignition
5	100		316	-	No ignition
6	450		316	7	Ignition
7	450		315	7	Ignition
8	450		314	-	No ignition
9	450		314	9	Ignition
10	450		313	7	Ignition
11	450		312	-	No ignition

 

Results: Ignition at 313 °C, no ignition at 312 °C.

Table 3 - 2^nd Main test series

Test no.	Sample volume [µL]	Barometric pressure [mbar]	T [°C]	Ignition delay [s]	Test result
1	450	1003	315	10	Ignition
2	450		312	8	Ignition
3	450		310	-	No ignition
4	300		310	9	Ignition
5	300		308	12	Ignition
6	300		306	-	No ignition
7	150		306	-	No ignition
8	450		306	-	No ignition
9	300		306	-	No ignition

 

Results: Ignition at 306 °C, no ignition at 304 °C.

Table 4 – Retest

Test no.	Sample volume [µL]	Barometric pressure [mbar]	T [°C]	Ignition delay [s]	Test result
1	300	1002	308	-	No ignition
2	450		308	12	Ignition
3	450		306	10	Ignition
4	450		304	-	No ignition
5	300		304	-	No ignition
6	150		304	-	No ignition
7	300		304	-	No ignition
8	450		304	-	No ignition

 

Results: Ignition at 306 °C, no ignition at 304 °C.

Evaluation
lowest value from pretest: 316 °C
lowest value for 1^stmain test: 313 °C
lowest value for 2^ndmain test: 308 °C
lowest value for retest: 306 °C

Lowest value of all main test/retest series: 306 °C

Conclusion: The auto-ignition temperature is 305 °C.

Description of key information

305 °C at 1002 hPa (EU Method A.15.)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

305 °C