Establishment of Erythropoietin for physicochemical tests CRS batch 2.

Here we report the outcome of a collaborative study aimed at demonstrating the suitability of the candidate Chemical Reference Substance (CRS) as a replacement reference (batch 2) for the physicochemical methods in European Pharmacopoeia monograph 1316 Erythropoietin concentrated solution. Results from the study demonstrated that for the physicochemical methods described in the monograph - capillary zone electrophoresis, polyacrylamide gel electrophoresis and immunoblotting, peptide mapping and glycan mapping - the candidate CRS is essentially identical to CRS batch 1 and is suitable to be established as Erythropoietin for physicochemical tests CRS batch 2. CRS batch 2 is a freeze-dried preparation presented in vials. It was adopted at the 177th session of the European Pharmacopoeia Commission in November 2023 and is available from the European Directorate for the Quality of Medicines & HealthCare (EDQM) under product code Y0001725.