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EC number: 231-143-9
CAS number: 7440-33-7
The coarser dusts (12 µm and 5 µm) did not appear to explode under the
standard method conditions in the concentration range of 250 to 6000
g/m3 (12-µm dust) and 300 to 7000 g/m3 (5-µm dust), respectively. For
the smallest particle size tested (0.6 -0.9 µm), the lower explosion
limit was measured to be 450 g/m3. Starting from this limit, the maximum
overpressure increased first with concentration, reached its maximum of
at least 4.7 bar at 5000 g/m3 and then slowly decreased. The pressure
rise rate showed the same behavior, its maximum was reached at the same
concentration to be at least 260 bar/s. These values were measured at
initial pressure lower 1 bar due to rather high explosive
concentrations; the correction to the 1 bar initial pressure gives the
calculated values of 5.7 bar and 310 bar/s, respectively.
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