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Spearmint is used for its aromatic oil, referred to as oil of spearmint. The most abundant compound in spearmint oil is R-(–)-carvone, which gives spearmint its distinctive smell.
O 1291 (OTTO) Oil mentha Cas no 8008-79-5 - used as a flavoring for toothpaste and confectionery, and is sometimes added to shampoos and soaps.