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Physical & Chemical properties

Explosiveness

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Administrative data

Endpoint:
explosiveness
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non-GLP (acceptable for physico-chemistry).

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008
Report Date:
2008

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
other: VDI 2263 (spark test)
Qualifier:
according to
Guideline:
other: prEN 14034 (suspended dust)
Principles of method if other than guideline:
- VDI 2263, SOP N° 013. Stationary spark (electrostatic) testing in a modified Hartmann tube.
- Physical explosivity values: Pmax and Kmax, prEN 14034, SOP N° 002,221-226. Pyrotechnic ignition at 10 kJ inside a sphere of 20L, pressure rise is then determined.
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): Extrait de levure SP0402/20 MG L
- Physical state: solid (powder) - NB: dried in vacuum 1h, 50°C
- Particle size: median < 63 µm
- Supplier: BioSpringer
- Analytical purity/impurities: not applicable (UVCB)
- Lot/batch No.: 070800870
- Expiration date of the lot/batch: not indicated
- Stability under test conditions: not indicated
- Storage condition of test material: not indicated

Results and discussion

Small-scale preliminary tests
Parameter:
other: Explosive under influence of flame
Remarks:
migrated information
Remarks on result:
negative (not further specified)
Remarks:
upon electrostatic spark (for fine powder)

Any other information on results incl. tables

- Electrostatic spark ignition testing:

EMI ("Energie Minimale d'Inflammation" / minimal energy needed to inflame) was estimated as >1J.

- Pyrotechnic ignition testing at 10 kJ:

dP/dt max = 199 bar/s

Pmax = 7.1 bar

Kst = 54 bar.m/s

Class of dust explosion: St 1

Applicant's summary and conclusion

Interpretation of results:
non explosive
Remarks:
Migrated information
Conclusions:
Based on the results the test item does not need to be classified for explosivity.
Executive summary:

Dried fine (<63 µm median size) powder Yeast extract is not explosive when submitted to electrostatic spark inflammation.

The minimal energy needed to inflame was estimated as >1J. Pyrotechnic ignition testing at 10 kJ showed pressure rise speed of 199 bar/s, Pmax = 7.1 bar and a St 1 class (minimal possible of 3 hazard classes) for dust explosion.