Aluminum Oxide Powders

We offer aluminum oxide powders for chromatography is a white to off white, tine-grained powder. Highly porous form of aluminum oxide. Its surface is more polar than that of silica gel and reflecting the amphitricha nature of aluminium, has both acidic and basic characteristics. The chromatographic characteristics are determined by its specific (internal) surface area measured by the bet method. Its mean pore diameter. And its pore volume, the latter two being in relation to the specific surface area.
technical parameter:
parameters values
size in mesh 30-70 60-120 60-200 70-230 100-200 230-400
unit in microns (µm) 210-500 125-250 74-250 63-210 74-149 40-63
ph (10% aqueous solution) 7+-0.5 7+-0.5 7+-0.5 7+-0.5 7+-0.5 7+-0.5
assay as sio2 min 97% min 97% 97.98% 97-98.3% 97-98.3% 97-99.5%
particle size above+
in between
below- 5% 5% 5% 5% 5% 5%
85% 85% 85% 80% 80% 70%
10% -10% -10% -15% -15% -25%
pore diameter-a 40-55 a 40-60 a 40-60 a 40-60 a 40-60 a 55-60 a
surface area [m2gm] 350-450 350-450 350-450 350-550 350-500 450-650
loi loss on ignition.