Ingredient review
Perfluoroalkyl Citrate Ester
INCI: ISODODECYL/PERFLUORONONYLETHYL DIMER DILINOLEATE/CITRATE
A synthetic film-former that boosts water resistance and wear time, but its perfluoroalkyl structure raises environmental persistence concerns.
In plain English
This ingredient is a man-made polymer that spreads into a thin, invisible film on your skin or hair. It helps makeup last longer and keeps sunscreen from washing off in water. Think of it like a clear, flexible raincoat for your skin — it locks in the product underneath and repels moisture. However, because it contains perfluoroalkyl (PFAS) components, it does not break down easily in the environment, which is a concern for some consumers.
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
Perfluoroalkyl Citrate Ester 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 Perfluoroalkyl Citrate Ester.
- 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
A synthetic ester made by combining isododecyl alcohol, perfluorononylethyl groups, dimer dilinoleic acid, and citric acid. It is a high-molecular-weight polymer designed to form a durable, water-repellent film.
How it works
When applied, the ingredient's long molecular chains link together as the solvent evaporates, creating a continuous, flexible film. This film physically blocks water and oil from penetrating the product layer, which extends wear time and improves water resistance. It also helps other ingredients stay put on the skin's surface.
Pros
Excellent water resistance
Creates a durable film that helps sunscreen and makeup stay effective even when swimming or sweating.
Lightweight feel
Despite being a film-former, it spreads into a thin, flexible layer that doesn't feel heavy or sticky on the skin.
Cons and cautions
Environmental persistence
The perfluoroalkyl part of the molecule is not biodegradable and can accumulate in the environment, which is a concern for eco-conscious users.
Synthetic origin
It is a fully man-made ingredient, so it won't appeal to those seeking natural or minimal-ingredient formulations.
Best for
- People who want long-wearing, waterproof makeup or sunscreen
- Those with oily skin who need products that stay put
Use caution if
- Consumers actively avoiding PFAS or fluorinated compounds for environmental or personal reasons
Usage tips
Safety summary
Generally considered safe for topical use at typical concentrations, with low irritation and comedogenic potential. However, the environmental persistence of its perfluoroalkyl component is a concern, and long-term skin absorption data for this specific molecule is limited.
Research notes
There is limited peer-reviewed research specifically on this exact ester. General studies on perfluoroalkyl substances indicate low acute toxicity but raise environmental persistence and bioaccumulation concerns. More research is needed on dermal absorption of high-molecular-weight PFAS esters.
Common label clues
- Typical concentration
- Typically 1–10% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the US and EU, but some PFAS compounds are being restricted or phased out in certain regions due to environmental concerns. Always check local regulations.
- Common uses
- Long-wear makeup, Waterproof sunscreens, Water-resistant skincare
- Environmental note
- Perfluoroalkyl chains are highly persistent in the environment and can bioaccumulate. Some manufacturers are moving toward biodegradable alternatives.
Good to know
- This ingredient is part of a broader class of perfluoroalkyl substances (PFAS) that are under regulatory review in several regions.
- It is often used in conjunction with silicones to improve spreadability and feel.
Common questions
What is Perfluoroalkyl Citrate Ester in beauty products?
This ingredient is a man-made polymer that spreads into a thin, invisible film on your skin or hair. It helps makeup last longer and keeps sunscreen from washing off in water. Think of it like a clear, flexible raincoat for your skin — it locks in the product underneath and repels moisture. However, because it contains perfluoroalkyl (PFAS) components, it does not break down easily in the environment, which is a concern for some consumers.
What does Perfluoroalkyl Citrate Ester do in a beauty product?
When applied, the ingredient's long molecular chains link together as the solvent evaporates, creating a continuous, flexible film. This film physically blocks water and oil from penetrating the product layer, which extends wear time and improves water resistance. It also helps other ingredients stay put on the skin's surface.
Is Perfluoroalkyl Citrate Ester safe for most people?
Generally considered safe for topical use at typical concentrations, with low irritation and comedogenic potential. However, the environmental persistence of its perfluoroalkyl component is a concern, and long-term skin absorption data for this specific molecule is limited.
Who should be careful with Perfluoroalkyl Citrate Ester?
Consumers actively avoiding PFAS or fluorinated compounds for environmental or personal reasons
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.