PFAS in Cosmetics: What Brands Aren't Testing For — And the Regulatory Reckoning Already Underway

There’s a compound family showing up in lipsticks, foundations, and waterproof mascaras that most brands never deliberately put there. Per- and polyfluoroalkyl substances — PFAS, the so-called “forever chemicals” — have been detected in finished cosmetic products at rates that surprised even researchers who study environmental contamination for a living.

A 2021 study published in Environmental Science & Technology Letters screened 231 cosmetic products purchased from US retailers and found PFAS in 56% of foundations and eye products tested. More telling: the products with the highest fluorine concentrations rarely disclosed PFAS-containing ingredients on their labels. The contamination wasn’t advertised — it was inherited, usually from fluorinated processing aids, raw material impurities, or functional ingredients added for water resistance without any awareness of their PFAS identity.

That study is four years old now. California has since passed AB 2771, enforcement is active, and brands selling into the state’s $14.5 billion cosmetics market are being held to a standard that most of their existing testing programs weren’t designed to meet.

Why PFAS End Up in Cosmetics Without Anyone Adding Them

Understanding the contamination pathway is essential for knowing how to test for it. PFAS aren’t always added to cosmetics as named ingredients — though certain functional PFAS like PTFE (polytetrafluoroethylene) have been used intentionally in powder products for their slip and blendability properties. The more common problem is unintentional carry-over from raw materials that were never screened for PFAS contamination upstream.

Fluorinated surfactants and film-forming polymers used in waterproof formulations are a major source. So are certain silicone-adjacent compounds, emollients, and pigment dispersion agents with fluorinated processing histories. A raw material supplier may not know — or may not disclose — that their process introduces trace PFAS into the finished ingredient. And unless a cosmetics brand specifically requests PFAS screening from a cosmetic testing laboratory before launch, those contaminants flow straight through into the consumer’s product.

Cross-contamination at shared contract manufacturing facilities is another underappreciated vector. PTFE-lined equipment, fluoropolymer hoses, and certain mold-release coatings can shed trace PFAS into product batches during normal processing. A brand can have a perfectly clean formulation and still receive a contaminated batch.

The result is a contamination profile that can include dozens of individual PFAS compounds simultaneously — many of which aren’t on any specific regulatory list yet, but which regulators are actively moving to address.

What an ISO 17025 Cosmetic Testing Laboratory Actually Screens For

This is where things get technically precise, and where a lot of brands get tripped up. There are more than 12,000 individual PFAS compounds currently catalogued, but most laboratories running PFAS panels target 30 to 40 specific analytes using EPA Method 533, EPA Method 537.1, or validated adaptations of those methods for cosmetic matrices.

The gold-standard analytical technique is LC-MS/MS — liquid chromatography coupled with tandem mass spectrometry — capable of detecting individual PFAS at concentrations below 1 part per billion (ppb) in complex formulations. For cosmetics like wax-based lipstick, oil-in-water emulsions, and pressed powder compacts, the extraction and cleanup steps are critical. Fatty matrices in particular can suppress ionization signals and produce false negatives if the method wasn’t validated specifically for that product type. A PFAS panel that works fine for water samples doesn’t automatically transfer to a cream foundation.

Some cosmetic testing laboratories also run a total fluorine screen as a preliminary triage step — measuring bulk fluorine content using combustion ion chromatography or high-resolution mass spectrometry. A product with less than 10 parts per million (ppm) total fluorine is unlikely to harbor concerning PFAS concentrations. Anything above that threshold warrants a full targeted LC-MS/MS screen to identify which specific compounds are present and at what levels.

One detail brands often miss: a negative result on a 40-compound PFAS panel doesn’t mean “no PFAS detected.” It means none of those 40 targeted compounds appeared above reporting limits. Given the size of the PFAS chemical family, a targeted panel is a minimum compliance screen — not a comprehensive characterization. For brands making clean beauty claims or entering EU markets with broader substance restrictions, a non-targeted screening approach may be warranted.

California AB 2771 and the Compliance Standard Brands Are Being Measured Against

California’s Toxic-Free Cosmetics Act (AB 2771), signed in September 2022 and effective January 1, 2025, prohibits the intentional addition of PFAS to cosmetics sold or distributed in California. The operative phrase is “intentional addition” — meaning a brand can’t knowingly formulate with PFAS, but the law doesn’t explicitly address trace contamination from raw materials or manufacturing processes in the same way a specific concentration limit would.

That nuance, however, offers less shelter than it might appear to. The California Department of Public Health (CDPH) has enforcement authority, and enforcement actions under California’s cosmetics safety framework have historically focused on finished-product composition, not formulation intent. If a product tests positive for PFAS above detectable thresholds, the burden falls on the brand to demonstrate the contamination wasn’t a result of intentional addition — and that argument is considerably harder to make without pre-launch testing records showing the brand was actively monitoring for it.

The EU is going further. The European Chemicals Agency (ECHA) is pursuing a universal PFAS restriction under REACH that would apply concentration limits rather than just a prohibition on intentional use. Early drafts suggest limits as low as 25 ppm total fluorine for cosmetics and personal care products. That rulemaking is expected to finalize in the 2026–2027 timeframe, and brands shipping globally need to design their testing programs around that stricter standard — not the more permissive US baseline.

What We’re Seeing from Brands That Test Early vs. Those That Wait

The pattern repeats predictably: brands that treat PFAS testing as a reactive measure — triggered by a retailer audit, a regulatory inquiry, or a competitor’s recall — discover contamination problems that cost far more to resolve than if they’d been caught during raw material qualification.

A reformulation at scale, after packaging has been designed and production inventory is already sitting in a warehouse, can easily run into six-figure remediation costs. Compare that to the $2,000–$4,000 a full PFAS panel on a new formulation typically costs at a certified cosmetic testing laboratory. The math isn’t complicated.

Brands that integrate PFAS screening into their raw material qualification process catch problems upstream, where fixing them is operationally straightforward: switch the supplier, request a reformulated ingredient, or adjust the specification. The waterproof and long-wear product categories carry the highest contamination risk based on both published literature and what we see from submitted samples. Water-resistant sunscreens, full-coverage foundations, setting sprays, and fiber-based mascara formulations warrant the closest scrutiny.

But we’ve also seen PFAS contamination in products with no obvious fluorinated ingredients — skin care serums, body lotions, fragrance products — where the route of entry was a processing aid at the contract manufacturer, not anything in the brand’s own formula. That’s exactly why finished-product testing matters even when your ingredient list looks clean.

Building a PFAS Testing Plan That Holds Up Under Scrutiny

Here’s a practical starting framework for cosmetics brands at any scale:

1. Screen new suppliers at the ingredient level: Request PFAS-free declarations and supporting third-party analytical data from every new ingredient supplier. For high-risk materials — silicones, fluorinated film formers, wax blends, spray propellants — require LC-MS/MS results, not just supplier attestations. Attestations without data are nearly worthless in a regulatory inquiry.

2. Test the finished formulation before launch: A full PFAS panel on your finished product, run by an ISO 17025-accredited cosmetic testing laboratory, belongs in your pre-market checklist as a non-negotiable line item. Build 5–10 business days for results into your launch timeline from the start.

3. Re-test whenever a raw material supplier changes: A “like-for-like” ingredient swap can change a product’s PFAS profile entirely. Any time a raw material source changes, treat that SKU as a new product from a PFAS compliance standpoint and re-run the panel.

4. Retain ISO-accredited COAs by product lot: A Certificate of Analysis from an accredited cosmetic testing laboratory showing PFAS results below reporting limits is your primary defense document in a CDPH inquiry, an Amazon compliance review, or a retailer audit. Supplier-provided documentation alone won’t carry the same evidentiary weight.

5. Track the regulatory calendar through 2027: The EU universal PFAS restriction, expected to finalize with concentration limits, will reset the global compliance standard. Brands with international distribution should be preparing testing documentation against the stricter forthcoming EU threshold now — not after the rulemaking lands.

PFAS isn’t a niche concern for a handful of specialty waterproof products anymore. It’s a category-wide testing gap that regulators in California, the EU, and increasingly at the federal FDA level are methodically closing. The brands positioning themselves well right now are the ones treating PFAS as a systematic testing priority from the start of product development — because that’s a significantly cheaper place to catch a problem than anywhere downstream.

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Written by Nour Abochama, Vice President of Operations, Qalitex Laboratories. Learn more about our team

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Related from our network

• Navigating FDA Regulatory Submissions and Cosmetic Safety Documentation — Aurora TIC’s consulting team helps brands build the regulatory documentation frameworks that support PFAS compliance and broader FDA cosmetic safety programs.
• Raw Material Supplier Qualification and Ingredient-Level Testing — Ayah Labs specializes in B2B raw material testing and COA verification — the upstream step where most cosmetic PFAS contamination can be caught earliest.
• Cosmetic and Personal Care Product Testing for the Canadian Market — Androxa provides Health Canada-compliant testing services for brands distributing personal care products across North America.