1 year. According to the query industry wikipedia, black sesame seeds if properly preserved, shelf life in a year, if the bulk black sesame seeds, to be eaten within half a month, black sesame seeds should be stored in a cool, ventilated and dry place; black sesame seeds contain fatty acids are mostly unsaturated fatty acids, if not properly preserved, in the temperature is too high, black sesame seeds are prone to deterioration, so black sesame seeds in the preservation of the time should be placed in glass jars to be sealed up , put into the refrigerator to save.