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Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
25 July 2019 to 13 August 2019
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:
2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
287 °C
Atm. press.:
100.2 kPa

TABLE 10.1 – RESULTS OF AUTO-IGNITION TEMPERATURE DETERMINATION

Atmospheric pressure (kPa)

Inner flask temperature (°C)

Sample volume (µL)

Clean flask (Y/N)

Ignition (Y/N)

Time lag (s)

Comments

100.3

500.0

100

Y

Y

1

Medium flame

100.3

440.0

100

Y

Y

1

Medium flame

100.3

380.0

100

Y

Y

14

Medium flame

100.3

350.0

100

Y

Y

2

Medium flame

100.3

320.0

100

Y

Y

6

Medium flame

100.4

290.0

100

Y

N

-

-

100.4

290.0

150

Y

Y

22

Small flame

100.4

275.0

150

Y

N

-

-

100.4

275.0

200

Y

N

-

-

100.2

284.0

150

Y

N

-

-

100.2

284.0

200

Y

N

-

-

100.2

287.0

150

Y

Y

26

Small flame

100.2

284.0

250

Y

N

-

-

100.2

284.0

300

Y

N

-

-

100.2

284.0

400

Y

N

-

-

100.2

284.0

100

Y

N

-

-

99.5

284.0

70

Y

N

-

-

99.5

284.0

50

Y

N

-

-

- Hot flame autoignition temperature (AIT): 287 °C

- Time lag to autoignition: 26 s

- Barometric pressure: 100.2 kPa

- Sample quantity: 150 µL

- Relative Humidity: 57 %

Conclusions:
No cool flames were observed. The autoignition temperature of the test item was determined to be 287 °C.
Executive summary:

GUIDELINE

The test was conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A.15.

 

METHODS

A small, metered sample of the test item was inserted into a uniformly heated 500 ml glass flask containing air at a predetermined temperature. The contents of the flask were observed in a dark environment for 10 minutes following insertion of the sample, or until autoignition occurs. Autoignition is identified by the sudden appearance of a flame inside the flask and by a sharp rise in the temperature of the gas mixture. The lowest internal flask temperature at which the hot-flame ignition occurred for a series of prescribed sample volumes was taken to be the hot-flame autoignition (AIT) of the chemical in air at atmospheric pressure. Ignition delay times (ignition time lags) were measured in order to determine the ignition delay / ignition temperature relationship. The lowest temperature at which cool flames (CFT) are observed was also recorded. In all instances the ignition delay times were recorded.

 

RESULTS

No cool flames were observed. The autoignition temperature of the test item was determined to be 287 °C.

Description of key information

No cool flames were observed. The autoignition temperature of the test item was determined to be 287 °C (EU Method A.15).

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
287 °C

Additional information

GUIDELINE

The test was conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A.15.

 

METHODS

A small, metered sample of the test item was inserted into a uniformly heated 500 ml glass flask containing air at a predetermined temperature. The contents of the flask were observed in a dark environment for 10 minutes following insertion of the sample, or until autoignition occurs. Autoignition is identified by the sudden appearance of a flame inside the flask and by a sharp rise in the temperature of the gas mixture. The lowest internal flask temperature at which the hot-flame ignition occurred for a series of prescribed sample volumes was taken to be the hot-flame autoignition (AIT) of the chemical in air at atmospheric pressure. Ignition delay times (ignition time lags) were measured in order to determine the ignition delay / ignition temperature relationship. The lowest temperature at which cool flames (CFT) are observed was also recorded. In all instances the ignition delay times were recorded.

 

RESULTS

No cool flames were observed. The autoignition temperature of the test item was determined to be 287 °C.