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A finished product with a water activity of 0.85 or less is

  • A.automatically classed as a low-acid canned food
  • B.required to be refrigerated at all times
  • C.considered sterile
  • D.outside the scope of 21 CFR Parts 108, 113 and 114

Answer: D

Controlling water activity to 0.85 or below takes a product outside those regulations, because at that level the organisms of concern in canned foods cannot grow. It is a regulatory threshold rather than a guarantee of sterility.

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