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Answer:
EDQM storage conditions are given in the Ph. Eur. reference standards database. Products should be stored in such a way as to avoid degradation. Our storage conditions are in most cases more stringent than those described in the monograph (if any).
The storage conditions only apply to unopened vials. Once a vial has been opened, the stability of its content cannot be guaranteed. Therefore, the EDQM makes no guarantees concerning the continued suitability of previously opened EDQM reference standards. Decisions concerning the proper use of previously opened EDQM reference standards are the responsibility of the user.
Similarly, reference standards stored under conditions other than those specified in the Ph. Eur. reference standards database cannot be guaranteed.