Reference Standardstorage

If USP reference standard storage condition is not specified, then at what temperature it should be stored?
Is it mentioned in USP?
If yes, then please give me reference.

Thanks in advance

As far as USP standards are concerned the storage conditions are always mentioned very rarely it happens that the conditions are not specified. In these cases the storage of these impurities or standards can be applied as per internal SOP’s of your company. Also it can be maintained based on your prior experience with the working molecule.