2.6 - fragrances Flashcards

1
Q

what are essential oils?

A

concentrated extracts of volatile, non-soluble aroma compounds from plants

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2
Q

what are three uses of essential oils?

A
  • cosmetics
  • perfumes
  • flavours
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3
Q

what are the most common compounds found in essential oils?

A

terpenes

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4
Q

what is the basic unit that terpenes are built from?

A

isoprene units

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5
Q

what are terpenes which contain oxygen called?

A

terpenoids

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6
Q

how many carbons are in an isoprene unit

A

5

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7
Q

why do essential oils have a limited shelf life?

A

essential oils have a limited shelf life as terpenes can undergo oxidation very easily

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8
Q

to improve shelf life it is important that essential oils are?

A
  • stored at low temperatures as they are highly volatile
  • protected from light
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9
Q

what do terpenes turn into as a result of oxidation?

A

terpenoids

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