Pseudoboehmite Pseudoboehmite is an aluminium compound with the chemical composition AlO(OH). It consists of finely crystalline boehmite. However, the water content is higher than in boehmite. Item Pole Volume Specfic Surface DryBasis SiO2 Dispersionindex Na2O Fe2O3 M1/g M2/g % % % % % HYN_001 0.70-0.90 240-320 70 ± 1 <0.06 <0.08 <0.02 0.90-1.10 280-340 70 ± 1 <0.06 <0.08 <0.02 HYN_002 0.70-1.10 240-380 70 ± 1 0.5-2.0 <0.08 <0.02 0.70-1.10 280-400 70 ± 1 2-4 <0.08 <0.02 0.80-1.20 220-400 70 ± 1 >4 <0.08 <0.02 HYN_003 0.70-1.20 200-300 70 ± 1 <0.02 <0.01 <0.01 HYN_004 0.37-0.45 240-280 >60 <0.06 >96 <0.10 <0.02 0.37-0.45 240-280 >60 <0.06 >96 <0.05 <0.02