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_______ is used as a preservative in active packaging.

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in Food Packaging Technology by (63.0k points)
_______ is used as a preservative in active packaging.

(a) Isoamyl acetate

(b) Niacin

(c) Ethylene

(d) Ethanol

The question was asked during an internship interview.

My query is from Active Packaging in Food topic in portion Modern Packaging Techniques of Food Packaging Technology

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Correct answer is (d) Ethanol

To explain I would say: Ethanol is used as a preservative in active packaging.  At high concentration, ethanol denatures the protein of mould and yeast. It can be used by spraying ethanol/water mixture absorbed onto silicon dioxide powder generating ethanol vapors. It is generally used for higher moisture bakery & fish products. Its disadvantage includes- off odour & off flavor.

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