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 |