Pharmacologic Assay PQ/CMC Test Subcategory Terminology Purity Assessment C1882508 Laboratory Procedure Purity Assessment Purity C62352 A quantitative assessment of the homogeneity or uniformity of a mixture. Alternatively, purity refers to the degree of being free of contaminants or heterogeneous components. Purity Assessment FDA Testing methods to identify actives and indirectly measure impurities that may be present in a medicine. Examples of analytical procedures for this test subcategory include SDS-PAGE and HPLC. Purity