shelf life

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The length of time a product may be stored without becoming unsuitable for use or consumption.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The length of time a product (especially food and drugs) will last without deteriorating or without being sold.
• noun The maximum time a packaged material can be stored under specific conditions and still meet the performance requirements specified.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the length of time a packaged food or drug will last without deteriorating