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What are preservatives?
Question
#89164. Asked by emilio2575. (Nov 28 07 2:56 PM)
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North_of_49
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A preservative is a natural or synthetic chemical that is added to products such as foods, pharmaceuticals, paints, biological samples,wood, etc. to prevent spoilage, whether from microbial growth or undesirable chemical changes.
http://en.wikipedia.org/wiki/Preservative
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