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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
auto-flammability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2012-10-23 - 2012-10-25
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP Guideline study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
GLP compliance:
yes (incl. certificate)
Remarks:
The Department of Health of the Government of the United Kingdom
Key result
Auto-ignition temperature:
ca. 360 °C
Atm. press.:
ca. 99.6 ca. kPa
Remarks on result:
other: Due to instrument failure, atm pressure was not recorded but is estimated.
Remarks:
Atm press estimated as average of high and low over 12 mo period

Due to a failure in the instrument used to record the atmospheric pressure, the atmospheric pressure was not recorded. A review of historical atmospheric pressure data over a twelve month period shows the atmospheric pressure as 95.79 to 103.93 kPa at Harlan Laboratories Ltd, Shardlow, UK.

The room temperature was 21 °C.

Table 1. Results of the auto-ignition temperature determination

Test

Temperature (°C)

Test Volume (µL)

Ignition Delay (s)

Observations

200
(clean flask)

70

> 300

No ignition. Grey fumes were emitted.

250
(clean flask)

70

> 300

No ignition. Grey fumes were emitted.

300
(clean flask)

70

> 300

No ignition. Grey fumes were emitted.

350

70

> 300

No ignition. Grey fumes were emitted.

400

70

5

An orange/blue flame. Grey fumes were emitted.

380

70

7

An orange/blue flame. Grey fumes were emitted.

370

70

15

An orange/blue flame. Grey fumes were emitted.

360

70

> 300

No ignition. Grey fumes were emitted.

366

70

> 300

No ignition. Grey fumes were emitted.

368
(clean flask)

70

> 300

No ignition. Grey fumes were emitted.

368
(clean flask)

200

> 300

No ignition. Grey fumes were emitted.

368
(clean flask)

400

5

An orange/blue flame. Grey fumes were emitted.

358

400

> 300

No ignition. Grey fumes were emitted.

362
(clean flask)

400

1

An orange/blue flame. Grey fumes were emitted.

360
(clean flask)

400

8

An orange/blue flame. Grey fumes were emitted.

358
(clean flask)

400

> 300

No ignition. Grey fumes were emitted.

358
(clean flask)

600

> 300

No ignition. Grey fumes were emitted.

358
(clean flask)

800

> 300

No ignition. Grey fumes were emitted.

358
(clean flask)

1000

> 300

No ignition. Grey fumes were emitted.

358
(clean flask)

1200

> 300

No ignition. Grey fumes were emitted.

358
(clean flask)

1400

> 300

No ignition. Grey fumes were emitted.

Conclusions:
The study report describes a valid guideline study conducted under certificated GLP compliance. The auto-ignition temperature was determined as 360 +/- 5 °C (not corrected to standard pressure).
Executive summary:

The auto-ignition temperature of magnesium sulfonate target substance (CAS 231297-75-9) was determined using a Carbolite flask heater and a procedure compatible to EU Method A.15 (Tremain, 2012). The test flask was heated in a flask heater. Aliquots of test item (tested as received) were injected into the flask using a syringe and the flask observed for signs of ignition over a 300 second period. This procedure was repeated, varying the sample size, as necessary, until the lowest temperature at which ignition, if any, occurred within 300 seconds of insertion, was determined. The room temperature during the experiment was 21 °C.

Due to a failure in the instrument used to record the atmospheric pressure, the atmospheric pressure was not recorded. A review of historical atmospheric pressure data over a twelve month period shows the atmospheric pressure as 95.79 to 103.93 kPa at Harlan Laboratories Ltd, Shardlow, UK. As result, an auto-ignition temperature of 360 +/- 5 °C is reported for the test substance.

Description of key information

EU Method A.15_Auto-ignition temperature: 360 +/- 5 °C

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
360 °C

Additional information

The key value was determined using the flask heater according to EU Method A.15 (Tremain, 2012).