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Physical & Chemical properties

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Administrative data

Endpoint:
self-ignition of dust accumulation
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
May 9, 2011 - May 10, 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report Date:
2011

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: BS EN 50281-2-1 : 1999 Part 2-1: Test methods of determining minimum ignition temperatures; Method B (Dust cloud in a furnace at a constant temperature).
Deviations:
no
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
- Appearance: fine, off-white powder with agglomerations

Results and discussion

Self-ignition temperature of dust accumulation
Key result
Self-ignition temperature:
400 °C
Remarks on result:
other: Minimum Ignition Temperature (MIT)

Any other information on results incl. tables

Test results

Furnace temperature (°C)

Dispersion pressure (barg)

Weight dispersed (g)

Number of dispersions

Ignition?

Yes (y) / No (n)

Flame size

500

0.1

0.1

1

y

Small

500

0.2

0.1

1

y

Medium

500

0.3

0.1

1

y

Small

500

0.5

0.1

1

n

-

500

0.2

0.2

1

y

Small

500

0.2

0.4

1

y

Medium

500

0.2

0.6

1

y

Medium

500

0.2

1.0 *

1

y

Small

480

0.2

0.4

1

y

Medium

460

0.2

0.4

1

y

Small

440

0.2

0.4

4

y

Small

420

0.2

0.4

8

y

Small

400

0.2

0.4

10

n

-

380

0.2

0.2

5

n

-

380

0.2

0.6

5

n

-

380

0.2

1.0 *

5

n

-

380

0.1

0.4

5

n

-

380

0.3

0.4

5

n

-

380

0.5

0.4

5

n

-

* Full dispersion chamber

- Ignition produced an orange flame and grey smoke

- The minimum dust cloud ignition temperature of the test substance has been determined to be 400°C

Applicant's summary and conclusion

Conclusions:
The minimum temperature of a hot surface that will result in ignition of a dust cloud of the substance under specified test conditions, the Minimum Ignition Temperature (“MIT”) value of a dust cloud of the substance, was determined in a GLP-compliant study in accordance with BS EN 50281-2-1 (1999). The MIT value was determined to be 400°C.