Fragrance oil
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Fragrance oil(s), also known as aroma oils, aromatic oils, and flavor oils, are blended synthetic aroma compounds or natural essential oils that are diluted with a carrier like propylene glycol, vegetable oil, or mineral oil. To allergic or otherwise sensitive people, synthetic fragrance oils are less desirable than plant-derived essential oils as components of perfume.
Aromatic oils are used in perfumery, cosmetics, flavoring of food.
Some include (out of a very diverse range):