Does the standard product have a valid period? China Inspection Institute
fromCentral Inspection InstituteThe purchased reference substances do not have a specified valid period, and there is no valid period like a drug, except for the varieties with a valid period indicated on the instructions. Under the specified storage and use conditions, the Central Inspection Institute will regularly conduct stability checks on the characteristic values. If it is found that it affects the use, relevant information will be announced in a timely manner. Normally, reference substances can be used all the time under the specified storage conditions, unless the Central Inspection Institute issues a new batch number or other regulations.
Whether it is the Central Inspection Institute, EP, or USP, inquire about the valid period of the reference standard of the Central Inspection Institute to the National Standard Product Network. The existing reference substances will be regularly re-marked to monitor the purity change. Usually, the old batch number is out of stock, and a new batch number will be issued. Therefore, after the new batch number is issued (Generally, the transition period for the new batch number is only a few months.) The Central Inspection Institute will not track and monitor the old batch number, and no longer ensure that the purity of the old batch number is the purity written on the reference product manual, so it is recommended to void the old batch number and use the new batch number. Of course, if you have enough data to prove that the purity of the old batch number has not changed, as long as the experts who come to check approve, there is no problem. Recommended reading:
