Storage of Meats Poultry and Seafood
Hamburgers

How long can you leave hamburger in the refrigerator before it goes bad?

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2009-07-02 00:57:01

"Color of Beef

Beef muscle meat not exposed to oxygen (in vacuum packaging, for

example) is a burgundy or purplish color. After exposure to the air

for 15 minutes or so, the myoglobin receives oxygen and the meat

turns bright, cherry red.

After beef has been refrigerated about 5 days, it may turn brown

due to chemical changes in the myoglobin. Beef that has turned

brown during extended storage may be spoiled, have an off-odor, and

be tacky to the touch."

from

http://www.fsis.usda.gov/Factsheets/Beef_from_Farm_to_Table/index.asp


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