AnsweredAssumed Answered

chemical reagents control in pharmaceutical industry

Question asked by Meng Xu on May 5, 2011
Latest reply on Sep 29, 2011 by Narayan Garimella

     USP Reference Standards are not labeled with an expiration date. USP uses an "official lot system" which does not assign a valid use date until the subsequent lot is released. When USP updates and publishes a new official lot, the previous lot will be assigned an expiration date which is referred to as the "valid use date."


How do you assign expiration date for chemical reagents when first received? Solid reagents, Solution, and Lab prepared?