can u give infermation regarding cu in usp.
Please give us more information about your question.
cu mean content uniformity (905 in usp).
I am not an expert on Content Uniformity, but the general idea is that you must sample multiple parts (tablets, vials, etc.) from a production batch to make sure that each unit contains the proper quantity of active ingredient. Sampling should be from different parts, or times, of the production cycle. The USP chapter gives guidelines and recommendations for sampling, analysis, and interpretation.