Boehmite CAS No.: 1318-23-6, nke a makwaara dị ka boehmite, usoro ihe omimi ya bụ γ- Al2O3 · H2O ma ọ bụ γ- AlOOH, kristal bụ nke orthogonal (orthorhombic) kristal usoro ma na-kristal n'ime α Phase hydroxide ịnweta, nke. bụ tumadi mejupụtara γ- AlOOH , nke nwere ike ida kristal mmiri na tọghata n'ime Al2O3 na elu okpomọkụ.