Back to Ingredient Dictionary

TETRAHYDRO-PENTAMETHYL-2-NAPHTHALENECARBALDEHYDE

Description

Tetrahydro-pentamethyl-2-naphthalenecarbaldehyde, also known as Lyral, is a synthetic fragrance ingredient commonly used in skincare and personal care products. This colorless to pale yellow liquid possesses a delicate, floral scent reminiscent of lily of the valley. Its molecular structure consists of a tetrahydronaphthalene ring with five methyl groups and an aldehyde functional group.

In skincare formulations, Lyral serves primarily as a fragrance component, contributing to the overall sensory experience of the product. It is often utilized in concentrations ranging from 0.1% to 1% in leave-on products and up to 2% in rinse-off formulations. While Lyral enhances the olfactory appeal of skincare products, it does not provide direct skin benefits.

It's important to note that Lyral has been associated with contact allergies in some individuals. As a result, the European Union has restricted its use in cosmetic products to a maximum concentration of 0.01% in leave-on products and 0.02% in rinse-off products. Formulators should be aware of these regulations and consider alternative fragrances for sensitive skin formulations. When used within recommended limits, Lyral can effectively contribute to a product's pleasant scent profile.