MMA in Acrylic Nails: How to Spot It, Why It’s Restricted, What to Ask Your Salon

By Polished & Pretty Nails Editors · Last checked October 2026

This guide to MMA acrylic nails covers what MMA is and how it differs from EMA, the liquid most salons use; what the FDA actually did about it and which states have written rules against it; what it can do to nails and to the people breathing it; and what to say at the front desk. Every claim links to an official or peer-reviewed source, and there’s a printable card for your wallet at the end.

MMA vs EMA, in plain words

An acrylic nail starts as two parts: a liquid and a powder. The liquid is a monomer, a small molecule that links up into solid plastic when it meets the powder, which is already a polymer.^2,5 Your tech dips a brush in the liquid, picks up a bead of powder, and shapes it on the nail while it hardens. A little unreacted monomer stays in the finished nail.²

Which monomer is in that liquid is the whole story. Most acrylic liquids today use ethyl methacrylate (EMA).¹ Methyl methacrylate (MMA) is its close chemical cousin, and liquid MMA was a common nail ingredient for many years.⁵ Outside the salon, MMA is an ordinary industrial chemical: it goes into plastics like Plexiglas and into bone and dental cements.^1,6

So why would a salon still use it? Arizona’s cosmetology board puts it plainly: MMA sets faster, grips harder and costs less, at roughly a third of the price of other acrylic products.¹ That grip comes with a catch. MMA doesn’t bond well to a natural nail unless the nail is roughed up with coarse abrasives, and that heavy filing can damage the nail plate and bed.⁵ Terms like monomer, polymer and fill are defined in our nail glossary.

Is MMA banned? What the FDA actually did

The “FDA ban” line is everywhere, including older official material. California’s 1989 health department booklet on artificial nails, reprinted in 2000, described a 1974 FDA ban.⁹ The FDA’s current page doesn’t use that word. The distinction matters because it tells you who to call: the FDA oversees products, while states license salons and nail technicians and write the salon rules.²

Two more details explain why MMA can still reach a nail table. Cosmetics, including nail products, don’t need FDA approval before they’re sold,² and products used only in salons don’t have to list their ingredients.² The FDA says MMA monomer is still used occasionally in some artificial nail products,² and the EPA’s salon guide tells owners not to buy or use any nail product containing liquid MMA monomer.⁵

1. Early 1970sThe FDA receives injury complaints tied to MMA nails: nail damage and deformity, and contact dermatitis.²
2. 1970sCourt actions, seizures and recalls remove 100% MMA nail products from the market.²
3. 1989California’s HESIS booklet warns nail techs about MMA (and calls it an FDA ban).⁹
4. 2002An expert panel finds EMA safe as used, with directions to avoid skin contact.²
5. 2011 to 2019Air studies in California, Utah and Michigan salons still detect MMA.^4,10,11
6. TodayNo federal rule names MMA; 40 states and DC prohibit it in their rules.^2 §

State rules: where MMA is prohibited

Because the FDA left it to the states, the real prohibitions are in state cosmetology rules and statutes.² Older guides, including the EPA’s, say “at least 30 states” restrict MMA;⁵ we went state by state instead. On October 5, 2026 we read the rules for all 50 states and DC, and 40 states and DC name MMA as prohibited. The table quotes each rule and links to it.

We found no MMA-specific rule in Alaska, Connecticut, Georgia, Massachusetts, Oregon, Pennsylvania or Virginia. That doesn’t make MMA welcome there: we searched the cosmetology rules, not every statute, and boards can act under general safety and workmanship rules. Hawaii is a good example. It has no MMA rule, but its board said in 2021 that MMA should not be used in artificial nails.¹²

Where a rule exists, it has teeth. Florida makes a violation a second-degree misdemeanor; New York sets a civil penalty of up to $1,000 for a first violation; and Maryland lets inspectors chemically test or sample products they suspect, with fines up to $1,000.^13,14,15

What MMA can do to nails, skin and lungs

Most of what’s known comes from injury reports, case studies and regulators’ warnings rather than large trials, so we’ve stuck closely to what those sources say. EPA considers MMA not likely to cause cancer in humans,⁶ and we’re not going to suggest otherwise. The documented problems are nail damage, allergy and breathing irritation.

The worst outcomes are rare but real. A 1980 case report describes a client who became allergic to MMA in an artificial-nail mix; her nail plates were gradually destroyed and still hadn’t grown back six years later.¹⁷ That’s one case, not a rate, but it’s the kind of report that put MMA on regulators’ radar. If your nails are thin or splitting after any set, our guide to brittle nails covers what actually helps.

What researchers keep finding

If you work with any acrylic liquid, ventilation is the lever that moves exposure most. In a NIOSH study, a downdraft table vented outdoors cut technicians’ EMA exposure from 8.7 ppm to 0.6 ppm.²⁰ That study began after six cosmetologists working with artificial nails were diagnosed with occupational asthma.²⁰ Our nail salon safety guide covers ventilation, gloves and masks in detail.

Signs your salon may be using MMA

None of these proves MMA on its own. The surest check is the bottle, since MMA should appear on the product label,¹ but salon-only products don’t have to list ingredients² and lab testing has found labels that miss chemicals.¹⁸ Treat these as reasons to ask questions, drawn from what state boards and federal agencies say:

What to ask your salon

Asking is normal, and in Arizona the cosmetology board says consumers have the right to ask, and be told, whether a product contains MMA.¹ Keep it friendly; a salon using a reputable EMA liquid is usually happy to show you the bottle. These are the questions worth having ready:

If a quote looks suspiciously low, our nail salon price checklist shows what a fair price includes, so you can compare salons on more than the total.

What to do if you suspect MMA

1. Stop the service. You’re allowed to pause or end an appointment. Ask to see the liquid before any more goes on.
2. Write down the details. Salon name and address, the date, your technician, and a photo of the bottle or the price list if you can get one. Keep your receipt.
3. If your nails or skin react, see a doctor. The FDA’s first step for any cosmetic reaction is to stop using the product and contact your healthcare provider.²³ Redness, swelling or pain around the nail can be a methacrylate allergy.²
4. File a complaint with your state board. States, not the FDA, license salons and nail techs, so salon complaints go to your state board.² Arizona’s board, for one, asks people who suspect MMA to file a complaint.¹ Every board’s website is linked in our nail tech license requirements by state guide.
5. Report the product to the FDA. The FDA asks people to report reactions to nail products, online through MedWatch or by phone.^2,23
6. Nail techs: you can also call OSHA. Workers can ask OSHA to inspect, OSHA keeps identities confidential on request, and employers can’t punish you for filing.²⁴ Don’t wait: OSHA can’t cite incidents more than six months old.²⁵

Printable client card

Print it, fold it along the dashed line, and keep it in your wallet or tape it inside a cabinet at your station. The button prints only the card.

Sources for every line on the card are in the sections above. If you’d rather skip liquid-and-powder acrylic altogether, Arizona’s board lists the alternatives: EMA acrylics, light-cure gels, wraps and natural nail manicures.¹ Our gel vs dip vs acrylic comparison breaks down cost, wear and damage, and how long gel nails last sets expectations for wear. If you switch to gel, here’s how to remove gel nails at home without wrecking them. Or try press-on nails, which skip the liquid and powder entirely.

Frequently asked questions

Is MMA banned in the United States?

Not by a federal regulation. The FDA says no regulation specifically prohibits MMA monomer in cosmetics, although it used court actions in the 1970s to remove 100% MMA nail products from the market. The prohibitions are state rules, and we found 40 states and DC whose current rules name MMA.²

How can you tell if acrylic nails have MMA?

You can't be certain without the product label, but state boards point to the same warning signs: a strong, unusual odor (California calls it very fruity), acrylic that sets very hard and is difficult to file, nails that won't come off with normal solvents, and a price that seems too low.^1,3

Why do some nail salons still use MMA?

Cost and grip. Arizona's cosmetology board says MMA is cheaper, sets faster and adheres more strongly, and that MMA product costs roughly a third of the price of other acrylic products.¹

Is the powder in acrylic nails MMA?

No. The powder is a polymer, often polymethyl methacrylate, which is already a plastic. The rules and warnings target the liquid monomer; EPA says powder MMA polymers are considered safer because they don't penetrate the skin.^2,5

Is EMA safe for acrylic nails?

EMA is the standard liquid in most salons, and an expert panel found it safe as used in 2002, with directions to avoid skin contact because it can cause allergies. It still needs good ventilation and careful application.^1,2

Can MMA nails cause permanent damage?

It can happen. Arizona's board says MMA nail liquid has been linked to permanent loss of the nail plate and, in some cases, permanent loss of feeling in the fingertips, and a 1980 case report describes nails that never grew back after an MMA allergy.^1,17

What should I do if my nails hurt after an acrylic set?

Stop and get it looked at. The FDA's advice for any cosmetic reaction is to stop using the product and contact a healthcare provider, then report it to the FDA. Redness, swelling and pain around the nail can be an allergic reaction to methacrylates.^2,23

Sources

Every claim above links to one of these official or peer-reviewed sources. We checked each one on October 5, 2026. If a link has moved or a rule has changed, email hello@polishedandprettynails.com and we’ll update this page.

1. Arizona Barbering and Cosmetology Board, Methyl Methacrylate: What to Know (2023)
2. FDA, Nail Care Products
3. California Board of Barbering and Cosmetology, Industry Bulletin: MMA (2014)
4. Zhong et al., Int Arch Occup Environ Health 2019 (Michigan salon air)
5. EPA, Protecting the Health of Nail Salon Workers (guide, PDF)
6. EPA, Methyl Methacrylate hazard summary
7. OSHA, Nail Salons: Chemical Hazards
8. Missouri Code of State Regulations, 20 CSR 2085-11
9. California Department of Public Health (HESIS), Artificial Fingernail Products (1989, reprinted 2000)
10. Quach et al., Am J Public Health 2011 (California salon air)
11. Alaves et al., Int J Environ Health Res 2013 (Utah salon air)
12. Hawaii Board of Barbering and Cosmetology, minutes of June 29, 2021
13. Florida Statutes § 477.0265
14. New York General Business Law § 404-a
15. Maryland Code, Business Occupations and Professions § 5-608.1
16. Acta Dermatovenerol Croat 2022 ((meth)acrylate allergy review)
17. Fisher, J Dermatol Surg Oncol 1980 (case report)
18. California DTSC, Sci Total Environ 2026 (178 nail products tested)
19. Gregoriou et al., Dermatitis 2020 (acrylate allergy)
20. NIOSH, Appl Occup Environ Hyg 1997 (ventilated table study)
21. South Dakota Cosmetology Commission, nails consumer guide
22. dcregs.dc.gov
23. FDA, How to Report a Cosmetic Product Related Complaint
24. OSHA 3542, Stay Healthy and Safe While Giving Manicures and Pedicures
25. OSHA, File a Complaint

State rule citations, with a link to each rule, are in the state table above.

This guide is general information, not medical or legal advice. For a reaction or an injury, see a doctor; for the rules that apply to a particular salon, check with your state board.