Ingredient review
Phenylacetaldehyde Glyceryl Acetal
INCI: PHENYLACETALDEHYDE GLYCERYL 1,3-CYCLIC ACETAL
A synthetic floral scent ingredient that is generally safe at low levels but offers no skincare benefit beyond fragrance.
In plain English
This is a man-made chemical that smells like hyacinth or sweet floral notes. It is added to products purely for scent, not to improve your skin. In tiny amounts it is considered safe, but if you have sensitive skin or prefer fragrance-free products, you may want to avoid it.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Phenylacetaldehyde Glyceryl Acetal is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Phenylacetaldehyde Glyceryl Acetal.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Phenylacetaldehyde glyceryl acetal is a synthetic fragrance compound created by reacting phenylacetaldehyde with glycerin. It is used to deliver a pleasant floral aroma in cosmetics and personal care products.
How it works
It works by evaporating from the skin or product surface and interacting with olfactory receptors in the nose, producing a floral scent perception. It does not actively change the skin's structure or function.
Pros
Pleasant floral scent
Adds a hyacinth-like fragrance that many find appealing in lotions, perfumes, and cleansers.
Low irritation at low levels
When used at typical low concentrations, it rarely causes irritation for most people.
Cons and cautions
No skin benefit
This ingredient is purely for scent and does not moisturize, protect, or improve skin health.
Potential allergen
As a synthetic fragrance, it can trigger allergic reactions or contact dermatitis in sensitive individuals, especially with repeated use.
Best for
- People who enjoy floral-scented products and have no history of fragrance allergy
- Those using rinse-off products like body wash where exposure is brief
Use caution if
- Individuals with known fragrance allergies or very sensitive, reactive skin
- Anyone seeking fragrance-free or hypoallergenic skincare
Usage tips
Safety summary
Generally recognized as safe for use in cosmetics at low concentrations by industry panels. However, it is a known fragrance allergen and may cause skin reactions in susceptible individuals. The Cosmetic Ingredient Review (CIR) has not specifically reviewed this acetal, but related phenylacetaldehyde derivatives are considered safe at low levels.
Research notes
Limited peer-reviewed research specifically on this acetal. Most safety data comes from broader fragrance safety assessments and regulatory allergen monitoring. It is considered a moderate sensitizer in patch tests for some individuals.
Common label clues
- Typical concentration
- Typically used at very low levels, often below 1% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the US and EU. In the EU, it must be listed on the label if present above 0.001% in leave-on products or 0.01% in rinse-off products due to allergen labeling requirements.
- Common uses
- Fragranced skincare, Perfumes, Body lotions, Cleansers
- Environmental note
- As a synthetic compound, its environmental persistence is low, but it is not biodegradable in all conditions. No significant environmental concerns are widely reported.
Good to know
- This ingredient is often listed simply as 'fragrance' or 'parfum' on labels, so you may not see its full name.
- It is regulated as a fragrance allergen in the EU and must be listed separately when above certain thresholds.
Common questions
What is Phenylacetaldehyde Glyceryl Acetal in beauty products?
This is a man-made chemical that smells like hyacinth or sweet floral notes. It is added to products purely for scent, not to improve your skin. In tiny amounts it is considered safe, but if you have sensitive skin or prefer fragrance-free products, you may want to avoid it.
What does Phenylacetaldehyde Glyceryl Acetal do in a beauty product?
It works by evaporating from the skin or product surface and interacting with olfactory receptors in the nose, producing a floral scent perception. It does not actively change the skin's structure or function.
Is Phenylacetaldehyde Glyceryl Acetal safe for most people?
Generally recognized as safe for use in cosmetics at low concentrations by industry panels. However, it is a known fragrance allergen and may cause skin reactions in susceptible individuals. The Cosmetic Ingredient Review (CIR) has not specifically reviewed this acetal, but related phenylacetaldehyde derivatives are considered safe at low levels.
Who should be careful with Phenylacetaldehyde Glyceryl Acetal?
Individuals with known fragrance allergies or very sensitive, reactive skin Anyone seeking fragrance-free or hypoallergenic skincare
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.