How to Select and Store
Sesame seeds are generally available in prepackaged containers as well as bulk bins. Just as with any other food that you can purchase in the bulk section, make sure that the bins containing the sesame seeds are covered and that the store has a good product turnover to ensure maximal freshness.
Whether purchasing sesame seeds in bulk or in a packaged container, make sure there is no evidence of moisture. Additionally, since they have a high oil content and can become rancid, smell those in bulk bins to ensure that they smell fresh.
Unhulled sesame seeds can be stored in an airtight container in a cool, dry, dark place. Once the seeds are hulled, they are more prone to rancidity, so they should then be stored in the refrigerator or freezer.