What’s butylphenylmethylpropional?

Butylphenylmethylpropional is a synthetic fragrance ingredient This is used in a wide variety of cosmetics and skin care products because of its strong floral scent.

Butylphenylmethylpropional, also called lily or lily aldehyde, is a synthetic aromatic aldehyde. Butylphenylmethylpropional is a colorless to light yellow liquid. In addition to being used in cosmetics, butylphenylmethylpropional can be used in non-cosmetic products such as household cleaners and laundry detergents.

the breakdown


the good:Butylphenylmethylpropional is mainly used to improve the odor of formulations.

not that good:Although butylphenylmethylpropional has a small risk of sensitization, some people may have an allergy to the ingredient.

For whom is that?All skin types except those identified as having an allergy.

Synergetic ingredients:Works well with most ingredients

Keep an eye on:There is nothing to observe here.

Why is butylphenylmethylpropional used?

In cosmetics and skin care products, butylphenylmethylpropional acts as a fragrance due to its strong floral odor. It is used in aftershave lotions, bath additives, bubble baths, detergents, hair care products, Moisturizers, Perfumes and colognes, shampoos and Skin care Products.

Butylphenylmethylpropional is an aldehyde, a family of ingredients that can be either natural or synthetic. Rose, citronella, cinnamon bark and orange peel contain natural aldehydes. Synthetic aldehydes result from the partial oxidation of primary alcohols. All aldehydes contain a functional carbonyl group (C = O). The carbon atom of this functional group has two remaining bonds which can be occupied by hydrogen or any generic alkyl or side chain. When at least one of these substituents is hydrogen, the compound is an aldehyde.

Aldehydes differ in smell. For example, most lower molecular weight aldehydes have an offensive odor, like rotten fruit. Some of the higher molecular weight aldehydes and aromatic aldehydes like butylphenylmethylpropional smell quite pleasant and are therefore used in perfumery.

Aldehydes can also increase the projection of a fragrance or its threshold. Sillage is sometimes referred to as a “lift” and indicates how far a fragrance is from the wearer and not how long it lasts on the skin. Sillage is different from the intensity of a fragrance; Sillage is more the ambient odor. A bold sillage can, however, fill the room, e.g. B. when someone enters an elevator and the perfume overwhelms the room. Therefore, it is important to use an appropriate amount of aldehyde in a perfume to find the ideal sillage: not too strong, but not too weak.

A disadvantage of using butylphenylmethylpropional in products is that this ingredient slowly oxidizes during storage and is not stable in the long term. This problem occurs with most aldehydes.

Is butylphenylmethylpropional safe?

The safety of butylphenylmethylpropional has been approved by the Expert panel of the Research Institute for Fragrances. Based on this assessment, a International Fragrance Association (IFRA) standard was established. The IFRA standard limits the use of butylphenylmethylpropional in fragrances due to possible dermal sensitization.

A research article published in the Taste and fragrance journal evaluated the risk of sensitization for 26 fragrances in 5451 products from 2007 to 2009. As an estimate of the risk of sensitization, the sensitization exposure quotient was calculated as the quotient of the relative frequency of sensitization and the relative frequency of use / labeling. The sensitization exposure quotient or risk varied widely, with butylphenylmethylpropional at the end of the list, indicating a very low risk of sensitization.

Since there is a risk of sensitization with butylphenylmethylpropional, its presence must be indicated in the list of ingredients if the product contains more than 0.001% in products intended to be left on the skin. It must also be listed if the product contains more than 0.01% and is to be rinsed off e.g. B. with detergents and shampoos.

Because of the possibility of an allergic reaction, people with sensitive skin should try using butylphenylmethylpropional or do a patch test with a product that contains this ingredient.

References:Panico, A, et al., 2019. “Skin Protection and Health Prevention: An Overview of Chemicals in Cosmetic Products”, Journal of Preventive Medicine and Hygiene, 60 (1), E50 – E57.

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