Also on labels as: 2-Phenoxyethanol, Ethylene glycol monophenyl ether, PhE
In one line
A synthetic preservative that stops bacteria and fungi from growing in cosmetics and skincare products.
What is Phenoxyethanol?
Phenoxyethanol is a synthetic ether alcohol produced by reacting phenol with ethylene oxide under controlled conditions. It appears as a slightly oily, colourless liquid with a faint rose-like scent. Although trace amounts occur naturally in green tea, the commercial ingredient used in cosmetics is entirely lab-made.
What does it do in the product?
It disrupts the cell membranes of bacteria, yeasts, and moulds, preventing them from multiplying inside a product. This extends shelf life and reduces the risk of contaminated cosmetics causing skin infections. It is often paired with other preservatives or chelating agents because it works best against a broad microbial range when used in combination.
Where you usually find it
Leave-on moisturisers and serums
Baby wipes and diaper creams
Shampoos and conditioners
Sunscreens
Makeup foundations and concealers
Is Phenoxyethanol something to worry about?
Regulatory bodies in both the US and EU have reviewed phenoxyethanol and permit its use at concentrations up to 1% in cosmetics, concluding it is safe for most adults at those levels. The main concern flagged in public assessments relates to infant and newborn exposure, particularly through products applied to the nipple area during breastfeeding, where ingestion is possible. Skin sensitisation and contact allergy are reported but relatively uncommon; the ingredient is considered low-risk for the general adult population at approved concentrations.
Who should pay attention
Newborns and infants, especially via products used during nursing
People with a known contact allergy or sensitivity to this preservative
Individuals prone to eczema or compromised skin barrier conditions
Anyone using multiple products daily, which may lead to additive exposure across a routine
People avoiding synthetic preservatives for personal or lifestyle reasons
How is it regulated?
In the US, the FDA permits phenoxyethanol as a cosmetic preservative and has separately issued a safety communication advising against use in nipple creams that could be ingested by infants. The EU's Cosmetics Regulation restricts it to a maximum concentration of 1% in finished cosmetic products, with specific cautions around use in products for children under three and in products applied to the nappy area. Both frameworks consider it acceptable at permitted levels for general adult use.
How to spot it on a label
It will appear near the end of an ingredient list, usually grouped with other preservatives such as ethylhexylglycerin or caprylyl glycol, reflecting its relatively low concentration. Watch for it in products labelled 'natural' or 'plant-based', where it sometimes appears despite the marketing tone, because it is synthetic. Products marketed as phenoxyethanol-free will state this explicitly, though they will use alternative preservatives instead.
What a cleaner swap looks like
Products that avoid phenoxyethanol typically rely on combinations of naturally derived preservatives such as sodium benzoate paired with potassium sorbate, or use fermentation-derived alternatives like leuconostoc or radish root filtrate. Anhydrous formulations — balms, oils, and powders — require fewer preservatives overall because bacteria need water to grow. If you use InZoRAH to scan a product label, it can flag the preservative system in use so you can compare options side by side.
Questions people also ask about Phenoxyethanol
Is phenoxyethanol safe for everyday use in adults?
At the permitted maximum of 1%, regulatory assessments in both the US and EU conclude it poses low risk for most adults. The concern level rises mainly with infant exposure or in people with pre-existing skin sensitivities. For healthy adult skin, occasional use in rinse-off or leave-on products is generally considered acceptable by food and drug authorities.
Why is phenoxyethanol a concern for babies?
Infants have a less developed capacity to process certain chemicals, and their skin absorbs substances more readily than adult skin does. The FDA specifically cautioned against using it in products applied to the nipple area because a nursing baby could ingest it. For nappy-area creams and products used directly on newborns, many parents and healthcare providers prefer alternatives.
Is phenoxyethanol natural or synthetic?
It is synthetic. While a structurally similar compound exists in tiny amounts in green tea, the phenoxyethanol used in personal care products is entirely manufactured from phenol and ethylene oxide in an industrial process. Products containing it cannot accurately be described as naturally preserved.
Can phenoxyethanol cause an allergic reaction?
Yes, though reactions are not common. It is an occasional cause of contact dermatitis, particularly in people who are already prone to ingredient sensitivities. Patch testing is the reliable way to identify a personal reaction. Anyone with a confirmed allergy should read physical product labels carefully, as trace amounts may appear even in products marketed as gentle or sensitive-skin formulas.
Does phenoxyethanol disrupt hormones?
This is frequently asked but remains scientifically unsettled at approved use levels. Some early laboratory studies raised questions about weak oestrogenic activity, but regulatory bodies reviewing the full body of evidence have not classified it as an endocrine disruptor at cosmetic concentrations. Research is ongoing, and the science is not yet closed on this point.
What concentrations of phenoxyethanol are actually used in products?
Formulators typically use it at between 0.5% and 1%, staying at or below the regulatory ceiling. It is often combined with co-preservatives so that each individual ingredient can be used at a lower concentration. The further toward the end of an ingredient list it appears, the lower its concentration in that specific formula.
Where this came from
FDA safety communication on cosmetic preservatives — Supports the caution regarding phenoxyethanol use in nipple creams and potential infant ingestion risk
EU Cosmetics Regulation (annex on restricted substances) — Supports the 1% maximum concentration limit and specific restrictions for children under three and nappy-area products
EFSA or EU Scientific Committee on Consumer Safety opinion on phenoxyethanol — Supports the safety conclusion for adult use at permitted levels and flags areas of ongoing uncertainty
Open Food Facts and Open Beauty Facts ingredient records — Supports prevalence data — the ingredient appears across a wide range of cosmetic product categories globally
Original write-up based on public records. Educational information, not medical advice — ingredient records change, so always read the physical label if you have an allergy.
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