All-purpose flour does eventually expire and should be discarded. All-purpose flour can be safely stored at room temperature for 1 year.
All-purpose flour and other types of flour can also be stored in the freezer for 1 to 2 years if sealed properly.
All-purpose and wheat flour can be stored safely in the refrigerator for 6 to 8 months.
Hard-gluten hard wheat is used in the making of all-purpose flour. This type of flour is made in unbleached and bleached versions.
Vitamins A and D are also added to many brands of all-purpose flour. All-purpose flour is milled to a fine texture.