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Unsaturated Aliphatic Acids

By: Michael Zviely
Posted: April 30, 2012, from the May 2012 issue of P&F magazine.

Five- and six-carbon atom unsaturated acids have an important role, mostly in cheesy and fruity flavors. For example, trans-2-hexenoic acid (FEMA# 3169, CAS# 13419-69-7) (F-1)—which occurs in apple, banana, grape, strawberry, beer, wine, pork and tea—has a cheesy, fatty, herbal, warm odor, and is applied to cheesy, berry and fruity flavoringsa.

The most important 5–7 carbon atom unsaturated carboxylic acids can be seen in F-2.

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