This is a product of the United States Pharmacopeia. An expiration date is not assigned to this material. Please see the link below to review the USP Certificate of Analysis for the current lot:
https://static.usp.org/pdf/EN/referenceStandards/certificates/1613804-R161V0.pdf
Please see the link below to review the USP product dating policy:
https://www.usp.org/sites/default/files/usp/document/our-work/reference-standards/usp-policy-statement-expiration-dating.pdf