3 Terms and Definitions The following terms and definitions apply to this document. 3.1 Anhydride bovine β-lactoglobulin: bovine β-lactoglobulin modified with 3-hydroxy-phthalic anhydride. 4 Requirements 4.1 Appearance is uniform brown viscous colloid. There should be no visible foreign matter, no impurities, no lumps, and no odor when observed with the naked eye. 4.2 Content of anhydride bovine beta-lactoglobulin 4.3 Physical properties 4.5 Microbial limits