The best source of stability information for this product is the Certificate of Analysis. This product is not assigned an expiration date, but is set up on a retest schedule. If sufficient quantity of a given lot is available as the retest date approaches, the product is reassayed and the retest date is then extended, provided material meets all required specifications. For this product, a retest date of 3 years from the date of quality release is assigned. Products with no retest or expiration date listed on the Certificate of Analysis are warranted for 1 year from the date of shipment. For products that are assigned an expiration date, the information is also available on the product label. Please see the link below to review a sample Certificate of Analysis for this product:
https://www.sigmaaldrich.com/certificates/Graphics/COfAInfo/fluka/pdf/PDF732367.pdf
This product is stored at room temperature. For this and other storage condition information please see the link below to review the SDS.
https://www.sigmaaldrich.com/sds/sigald/31665