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EC number: 204-617-8 | CAS number: 123-31-9
Additional physico-chemical information
Administrative data
Link to relevant study record(s)
Description of key information
Determination of the Minimum Ignition Energy (MIE) under standardised conditions (milling and sieving at size < 63 um) showed a high susceptibility to ignition. Determination on standard product as is (without size reduction) indicate also high sensitivity to ignition (dust explosivity potential).
MIE: 1-3 mJ (commercial grade, milled and sieved to achieve a homogeneous particle size of less than 63 um according to EN standard 13821)
MIE: 8-10 mJ (commercial grade as is, majority of particles > 100 um)
Additional information
The results of 3 different studies investigating the Minimum Ignition Energy of dust/air mixtures to assess the dust explosive potential (or combustible dust hazard) for the purpose of Process Safety measures in the production sites are summarized below:
|
Sample description |
Particle size |
method |
MIE results |
Product 1 (1993) |
Commercial grade as is, without size reduction |
No data (majority > 63 um) |
British standard BS:5958 part 1:1991 |
8 – 10 mJ |
Product 2 (2006) |
Commercial grade, milled and sieved to < 63 um according to EN standard (normalised sample*) |
< 63 um (no details) |
EN 13821 EN 14034-2 |
1 – 3 mJ Kst: 314 bar.m/s |
Product 3 (2007) |
Commercial grade, milled and sieved to size < 63 um according to EN standard (normalised sample*) |
D50: 15 um D90: 41 um |
EN 13821
|
1- 3 mJ |
Sample from the inspection hatch of the drier output, without size reduction (^) |
D50: 89um D90: 171 um |
30- 100 mJ |
||
Product 4 (2007) |
Commercial grade, ground and sieved to size < 63 um according to EN standard (normalised sample*) |
D50: 15 um D90: 44 um |
EN 13821 |
1- 3 mJ |
Refusal from Sieve 63 um |
D50: 20 um |
1- 3 mJ |
||
sample from the inspection hatch of the drier output, without size reduction (^) |
D50: 50 um D90: 100 um |
3- 10 mJ |
*The current EN standard requires assessing the MIE on samples after reduction by milling and sieving of particles to sizes less than 63 um.
(^) due to the localization of the sampling, the size is not representative of the commercial product, but rather a fraction of broken particules produced during the drying process.
These results indicate a high sensitivity to static charges, even for the products as is.
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