Nonanal

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-flammability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Qualifier:

according to guideline

Guideline:

EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))

Deviations:

not specified

Qualifier:

according to guideline

Guideline:

other: DIN 51 794

Deviations:

not specified

GLP compliance:

yes

Specific details on test material used for the study:

- Name of test material (as cited in study report): n-Nonanal (nonyl aldehyde, pelargonaldehyde)
- Physical state: Colourless liquid
- Lot/batch No.: 20091103145756
- Expiration date of the lot/batch: > 6 months at room temeprature after receipt at AQuara (26th November 2009).
- Storage condition of test material: Cool; at room temperature between 0 and 49 °C, dry; handle under N2.
- Other:

Auto-ignition temperature:

195 °C

Atm. press.:

1 016 hPa

Result

Test No.	Temperature °C	Injected volume (drops)	Time-lag (s) until ignition
Test 1	215	5/10	-/8
	210	10	16
	205	10/15	-/28
	200	15	40
	195	15/20	-/-
	198	20	49
	196	20	-
Test 2	210	5/10	-/17
	205	10/15	-/20
	200	15/20	-/39
	195	20	66
	190	20	-
	193	20	-
Test 3	210	5/10	-/24
	205	10/15	-/28
	200	15/20	-/-
	203	20	34
	201	20	40
	199	20	57
	197	20	-

The measured lowest ignition temperatures of the main test are < 300 °C anddo not differ by more than 10 °C, thus the test is satisfactory. the autoignition temperature is defined as the lowest temperature of all single results of the main test, but rounded down to multiples of 5 °C.

	Test 1	Test 2	Test3
Lowest ignition temperatures (°C).	198	195	199
Autoignition temperature (°C)	195

Conclusions:

The test substance was assessed for autoflammability acording to EU test method A5 and DIN 51 794. The autoignition temperature was 195 °C at 1016 hPa.

Description of key information

Autoignition temperature: 195 to  200 °C based on 2 studies, both EU method A15, DIN 51794.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

195 °C

Additional information

Two studies are available in which the auto-ignition temperature has been determined according to EU method A15 and DIN 51794.

In the first study (2011 -288), no ignition was observed at a temperature of 199 °C. The lowest temperature giving a positive effect was 204 °C. According to the guidelines the lowest temperature was rounded off to the nearest multiple of 5 °C. Therefore the auto-ignition temperature of the test item was considered to be 200 ± 10 °C. The +/- 10 °C refers to the reproducibility of the method as specified by the guideline. In the second study (T10354), the autoignition temperature was determined to be 195 °C. This lower temperature has been used for the puposes of the CSA.