Hydroxycitronellal

Concerns
Allergen

What is Hydroxycitronellal?

Hydroxycitronellal is a synthetic organic compound classified as an α,β-unsaturated aldehyde, derived from chemical synthesis to replicate the fresh, floral notes of lily of the valley flowers. It belongs to the category of aroma chemicals commonly employed in perfumery and personal care formulations. In cosmetic products such as perfumes, lotions, shampoos, and soaps, it functions by volatilizing upon application, releasing its characteristic green-floral scent that lingers subtly on the skin. This ingredient contributes to the olfactory profile by blending with other fragrances and helping to neutralize or cover base odors from raw materials, enhancing the overall sensory appeal without altering the product's texture or stability. Its use is regulated in regions like the EU due to sensitization risks, typically at trace levels for efficacy.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 3-6 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Fragrance ingredient
Contributes scent character and/or masks base odors, shaping the overall sensory experience of the formula (subject to allergen and IFRA considerations).
Masking
Reduces perception of unpleasant odors or tastes by neutralizing them or covering them with more acceptable sensory notes.

Benefits

Provides a pleasant lily-like floral fragrance to products.

Helps mask unpleasant odors from other ingredients.

Enhances the sensory experience in leave-on and rinse-off cosmetics.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
People enjoying fresh floral scents in daily personal care.
Those with known fragrance allergies or sensitivities.
Individuals using scented lotions or perfumes without sensitivity issues.
People with contact dermatitis history.
Users seeking subtle aroma enhancement in grooming products.
Individuals prone to skin sensitization from synthetic scents.

Safety Notes

  • Recognized as a potential contact allergen requiring declaration in some regulations.
  • EWG rates it moderate hazard mainly due to allergy concerns.

Frequently Asked Questions about Hydroxycitronellal

What does hydroxycitronellal smell like?

It offers a fresh, green lily of the valley floral aroma used in fragrances.

Is it safe for sensitive skin?

It poses allergy risks for some; patch testing recommended for sensitive users.

Where is it commonly used?

Found in perfumes, body lotions, shampoos, and soaps for scent.