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Reference
Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
28 September 2017 to 17 October 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Relative self-ignition temperature:
> 400 °C
Remarks on result:
no self ignition observed under the test conditions

Assay No. 1

Duration of the test: 793.5 min

Rate: 0.50°C/min

Observations: At the start of the test, the test material was a white powder and remained white at the end of the test.

No self-ignition temperature of the test material was observed up to 400°C (corrected value).

 

Assay No. 2

Duration of the test: 788.0 min

Rate: 0.51°C/min

Observations: At the start of the test, the test material was a white powder and remained white at the end of the test.

No self-ignition temperature of the test material was observed up to 400°C (corrected value).

Conclusions:
Under the conditions of the test, no self-ignition temperature of the test material was observed up to 400°C (corrected value).
Executive summary:

The relative self-ignition temperature of the test material was assessed according to EU Method A.16.

A volume of about 8 cm³ of the solid test material is placed in an oven at room temperature. The temperature / time curve relating to the conditions in the centre of the sample is recorded while the temperature of the oven increases to 420°C (at least) at a rate of about 0.5°C/min. The temperature of the oven at which the sample temperature reaches 400°C by self-heating is called the self-ignition temperature for the purpose of this test. Two assays are performed.

The observed temperatures (OT) are corrected using the calibration curves (obtained from the apparatus calibration with 6 temperatures from about 25°C to 420°C or 600°C by an external company) to calculate the corrected temperatures (CT).

In both assays the test material was a white powder and remained white at the end of the test.

No self-ignition temperature of the test material was observed up to 400°C (corrected value).

Description of key information

Under the conditions of the test, no self-ignition temperature of the test material was observed up to 400°C (corrected value).

Key value for chemical safety assessment

Additional information

The relative self-ignition temperature of the test material was assessed according to EU Method A.16.

A volume of about 8 cm³ of the solid test material is placed in an oven at room temperature. The temperature / time curve relating to the conditions in the center of the sample is recorded while the temperature of the oven increases to 420°C (at least) at a rate of about 0.5°C/min. The temperature of the oven at which the sample temperature reaches 400°C by self heating is called the self-ignition temperature for the purpose of this test. Two assays were performed.

The observed temperatures (OT) are corrected using the calibration curves (obtained from the apparatus calibration with 6 temperatures from about 25°C to 420°C or 600°C by an external company) to calculate the corrected temperatures (CT).

In both assays the test material was a white powder and remained white at the end of the test.

No self-ignition temperature of the test material was observed up to 400°C (corrected value).