What Are Acrylates? Uses, Health Risks, and Safety

Acrylates are a family of synthetic chemicals built from acrylic acid or methacrylic acid, and they show up in far more products than most people realize. Valued for their ability to form tough, clear, fast-curing polymers, they are found in everything from gel nail polish and dental fillings to bone cement and the adhesive holding a continuous glucose monitor to your arm. Their versatility has made them one of the most widely used classes of industrial and consumer chemicals, but that same ubiquity means more people are being exposed to their uncured (liquid) forms, which is where most of the health concerns begin.

Where You Actually Encounter Acrylates

The word “acrylate” covers a broad group of related compounds. Some of the most common include methyl methacrylate (MMA), hydroxyethyl methacrylate (HEMA), ethyl acrylate, and butyl acrylate. Once polymerized, meaning the liquid monomers have linked together into a solid plastic, acrylates are generally stable and inert. The problems arise when the monomers have not fully cured, because that is when they can penetrate skin, trigger immune reactions, or release vapors.

In industry, acrylate polymers go into coatings, paints, adhesives, sealants, textiles, and 3D-printing resins. They are prized for characteristics like good biocompatibility, low cost, and the ability to be recycled or reused in certain formulations.¹ In medicine, poly(methyl methacrylate), or PMMA, remains the dominant material for bone cements used in joint replacements and spinal surgery because of its mechanical stability and handling properties.² Methacrylate-based resins also form the backbone of modern dental fillings and bonding agents, though their long-term durability remains a challenge, with essentially all dental resins failing within a decade.³

For everyday consumers, the most common point of contact is the nail salon. UV-curable gel nail polishes rely on acrylate and methacrylate monomers that harden under LED or UV light.⁴ A newer and growing source of exposure comes from medical devices: the adhesives in continuous glucose monitors and other wearable sensors often contain acrylates like isobornyl acrylate, and they represent what researchers have flagged as a rising concern for allergic reactions.⁵

The Gel Nail Connection

If you have ever gotten a gel manicure, you have had uncured acrylate monomers applied directly to your nails. This is the single biggest route of consumer exposure, and it is also where the most complaints come from. A systematic review of gel nail polish side effects identified 88 patients across 12 studies, all women, with problems ranging from allergic skin reactions to mechanical nail damage and UV-induced skin lesions. Allergic contact dermatitis accounted for roughly 70% of those cases.⁶

Beyond allergy, the removal process itself causes trouble. Acetone soaking and manual peeling can leave nails thin, brittle, and weak. Clinical reports have documented nail thinning, white discoloration, and layered splitting after gel polish removal.⁷

One issue that makes things worse: product labels frequently do not match what is actually inside the bottle. An analysis of 37 artificial nail products found that 32 contained acrylates, and in every single one there was a mismatch between the ingredients listed on the packaging and what chemical analysis revealed. HEMA turned up in over half the products, and hydroxypropyl methacrylate appeared in about a quarter, yet many packages failed to declare either.⁸ That labeling gap matters because if you have already developed a sensitivity to a specific acrylate, you cannot reliably avoid it by reading the label.

Allergic Contact Dermatitis

The main health risk from acrylates is allergic contact dermatitis, a delayed-type immune reaction that develops after repeated skin exposure to uncured monomers. It typically shows up as red, itchy, cracked skin on the hands, fingertips, and sometimes forearms. Since the 1950s, occupational cases have been well documented, originally concentrated among dental technicians who handled acrylate-based materials every day. Over recent decades, that pattern has shifted: the rapid growth of the gel nail industry has made nail technicians and their customers the most affected groups.⁹

A case series of nail salon workers found that all six patients had reactions to HEMA, five reacted to ethyl acrylate, and each also reacted to additional acrylates not included in standard patch-test panels. Their symptoms included dermatitis on the backs of their hands, palms, and forearms, along with painful fingertip fissures.¹⁰ Similar patterns turn up in dental workers. A study of 32 dental personnel with confirmed acrylate allergy found that dentists and dental nurses were most commonly sensitized to HEMA and related methacrylates used in bonding agents and filling materials.¹¹

Cross-Sensitization and Why It Matters

One of the trickiest aspects of acrylate allergy is cross-sensitization: once your immune system reacts to one acrylate monomer, it often starts reacting to chemically related ones too. HEMA is a particularly common gateway. Becoming sensitized to HEMA can trigger cross-reactions to ethylene glycol dimethacrylate and hydroxypropyl methacrylate, among others.¹²

This has practical consequences that go beyond cosmetics. If you develop a HEMA allergy from gel nails, you may later react to a dental composite, a bone cement during surgery, or the adhesive on a medical device. These are not hypothetical scenarios. Case reports describe dental practitioners developing dermatitis on their hands from bonding materials despite wearing gloves, with the allergens penetrating the glove material.¹³ For a consumer, the lesson is that an acrylate sensitivity picked up in one context can follow you into seemingly unrelated medical settings.

Respiratory Risks

While skin reactions get the most attention, acrylates can also affect your lungs. Acrylate monomers are classified as known skin sensitizers, but they are not currently classified as respiratory sensitizers by most regulatory bodies. Researchers have argued that classification needs updating. A multicenter study of occupational asthma caused by acrylates found that affected workers showed distinctive features including work-related rhinitis and elevated markers of airway inflammation during exposure. The authors concluded that acrylates may trigger asthma through immunologic pathways different from those of other small-molecule occupational agents and called for their hazard classification to be reevaluated.¹⁴

The respiratory concern is especially relevant in nail salons and dental offices where ventilation may be poor. During UV curing of acrylate-based products, volatile components including acrylate monomers and compounds like benzaldehyde and cyclohexanone can be released into the air, with emission rates influenced by temperature and humidity.¹⁵ Nail technicians who spend hours a day performing gel manicures are breathing these compounds on every shift.¹⁶

Why Standard Gloves Are Not Enough

One of the most common pieces of safety advice for anyone working with acrylates is to wear gloves. The problem is that many gloves do not actually block acrylate monomers. A study testing 15 different glove types, including natural rubber latex, synthetic rubber, and nitrile, found that the smallest monomer, methyl methacrylate, permeated through every single glove material within three minutes.¹⁷ That is a striking finding because nitrile gloves are the standard recommendation in both dental offices and nail salons.

The practical implication is that gloves slow exposure rather than prevent it. If you are working with uncured acrylates, changing gloves frequently and avoiding prolonged skin contact matters more than simply having gloves on. For consumers getting a gel manicure, the risk is different: the acrylate is applied to your nails, not your skin, but spills, floods into the cuticle area, and incomplete curing can all create direct skin contact with uncured monomer. That is why some dermatologists advise applying a thin layer of petroleum jelly around the cuticles before a gel manicure to act as a barrier.

Cancer and Long-Term Toxicity

Given how widespread acrylate exposure is, one of the first questions people ask is whether these chemicals cause cancer. The available evidence is reassuring on this point. A review of the genotoxic, mutagenic, and carcinogenic potential of several common lower acrylates found that these compounds are metabolized rapidly in the body through enzymatic breakdown and conjugation with glutathione, the body’s main detoxification molecule. The overall data supported what toxicologists call a non-genotoxic mechanism, meaning that while very high concentrations can kill cells outright, the acrylates tested did not directly damage DNA in the way classic carcinogens do.¹⁸

At the cellular level, methacrylate monomers used in dental materials do deplete glutathione in cells, which is one pathway by which they cause toxicity. But the relationship between glutathione depletion and cell damage turned out to be more complicated than expected: researchers found they could not directly correlate the degree of glutathione loss with the degree of toxic response, suggesting other mechanisms are also at play.¹⁹ In practical terms, cancer from acrylate exposure is not a well-supported concern at the levels people encounter in consumer products or occupational settings. Skin sensitization and respiratory irritation remain the primary health issues.

How Acrylates Behave in the Environment

Acrylates are produced in huge quantities for industrial use, which raises questions about what happens when they end up in water or soil. The environmental picture is more favorable than you might expect. Acrylic acid breaks down rapidly in soil, with a half-life of less than a day. The acrylic esters biodegrade at varying rates: ethyl acrylate and butyl acrylate degraded readily in standard tests, while acrylic acid and methyl acrylate were slower in short-term tests but still showed strong degradation over 28 days. Bioconcentration potential was low across the board, meaning these chemicals do not build up in the bodies of fish or other organisms the way persistent pollutants do.²⁰

That said, the acrylic esters are moderately toxic to aquatic life at low concentrations. Lethal or effect concentrations for fish and invertebrates ranged from about 1 to 8 mg/l for methyl, ethyl, and butyl acrylate, which is low enough to cause harm in a direct spill or industrial discharge scenario.²⁰ The saving grace is that they do not persist. Unlike heavy metals or PFAS compounds, acrylates break down relatively quickly, so the environmental risk is more about acute exposure events than long-term accumulation.

Detecting Residual Monomers in Products

Part of the safety challenge with acrylates is that the health risks come almost entirely from uncured monomers, not from the finished polymer. Ensuring that a dental filling, a nail coating, or an industrial adhesive has fully cured means knowing how much residual monomer is left behind. Analytical chemists use gas chromatography coupled with mass spectrometry to measure trace levels of unreacted acrylate monomers in finished products, with modern methods capable of detecting residual monomers at concentrations as low as a few milligrams per kilogram of material.²¹ Similar approaches have been developed for water-based polymer emulsions used in paints and coatings.²²

For consumers, these lab methods are invisible, but they matter because they underpin quality control. A gel nail polish that was properly formulated and fully cured under the correct UV lamp for the recommended time will have much less free monomer on its surface than one that was under-cured. Using the wrong lamp, curing for too short a time, or applying excessively thick layers all increase the amount of unreacted monomer left sitting against your nail and surrounding skin. This is one reason why at-home gel nail kits, which often ship with underpowered lamps and minimal instructions, may carry higher sensitization risk than professional salon applications.

Acrylates in Medical Devices

The rise of wearable medical devices has created a new and growing population of people developing acrylate allergies who have never set foot in a nail salon or dental office. Continuous glucose monitors, insulin pump adhesive patches, and electrocardiogram electrodes all use acrylate-based adhesives to stick to skin for days or weeks at a time. The prolonged, occlusive contact increases the chance of sensitization compared to brief exposures.

Isobornyl acrylate has been singled out as a key allergen in this context, identified in multiple glucose monitor brands and flagged as a growing concern in dermatology literature.⁵ The same compound has been found in gel nail products as well.⁸ For people with diabetes or other conditions requiring wearable devices, developing an acrylate allergy is not just uncomfortable but potentially disruptive to disease management. Some patients have had to switch devices, use barrier films, or take oral antihistamines to continue wearing their monitors. Because cross-sensitization can develop, a person who first reacted to a glucose monitor adhesive may subsequently react to dental materials or cosmetic products containing related monomers, echoing the same cascading pattern seen in other exposure contexts.