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EC number: 204-465-2
CAS number: 121-33-5
Picture digital camera: Rhovanil: white powder of fine crystals with
some agglomerates. Vaniltek: white to pale yellow flakes presenting a
heterogeneity of sizes and shapes, most are large flakes in the range 1
mm to 5 mm.
Microscope pictures: Rhovanil: plate and some needles like crystals from
50 to > 500 µm. Vaniltek: flakes presenting some fine particles
agglomerated to bigger particles.
Sieving of the flakes: 91.0% weight > 1000 µm, 6.5% weight in the range
from 500 to 1000 µm; it was not possible to collect fine particles < 100
µm, so no analysis on laser Sympatec was further performed.
Fragility test: the attrition of particles or flakes is realized with
insertion of two rubber balls (diameter 35 mm, weight 23 +/- 1g) on the
1 mm sieve. Results on fragility are the particle size distribution
compared with standard sieve analysis described above. Average result
from 2 measurements: vaniltek flakes are somewhat fragile, 65.1% weight
keep their initial size. A low level for generation of fine particles <
100 µm is observed (around 0.2 % weight).
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