Fragrances are substances that possess strong-smelling organic compounds used in many products as a perfume. The term "Fragrance" or "Parfum" on an ingredient list refers to all the compounds and chemicals that comprise a product’s fragrance, typically dozens of ingredients, and companies are not required to disclose the individual fragrance elements as the fragrance "blend" is considered proprietary information
. Fragrances elicit positive emotions and evocative autobiographical memories, but they can also cause detrimental health effects, including contact allergy
. Fragrance suppliers have long enjoyed federal trade secret protections that allow them to hide the ingredients that make beauty and personal care products smell good, resulting in incomplete information regarding fragrance and flavor ingredients on product labels
. The main reason perfume manufacturers can use toxic chemicals in their products is the legal relaxation of listing ingredients on the labels
