Method for purifying antibody or antibody-like molecule

A method for purifying an antibody or a protein, the method comprising the step of:

• adding a pre-formed water-insoluble inorganic compound to an aqueous solution or a suspension comprising the antibody or the protein and an impurity or filling a column with a pre-formed water-insoluble inorganic compound and passing an aqueous solution or a suspension comprising the antibody or the protein through the column to adsorb the impurity onto said pre-formed water-insoluble inorganic compound and obtain a liquid part comprising the antibody or the protein,
• wherein said pre-formed water-insoluble inorganic compound comprises at least one member selected from the group consisting of magnesium carbonate, magnesium oxide, magnesium phosphate, and aluminum oxide, and
• the antibody or the protein is at least one member selected from the group consisting of polyclonal antibody, monoclonal antibody, human antibody, humanized antibody, chimeric antibody, single-chain antibody, heavy chain antibody, multivalent antibody, Fab, F(ab′), F(ab′)2, Fc, Fc fusion protein, bispecific antibody, heavy chain, light chain, single-chain Fv, sc(Fv)2, disulfide bonded Fv, Diabody or micro-antibody.