California Cosmetology Written ExamSafety and Infection ControlMedium
A nail technician wants to offer acrylic nail enhancements using a monomer liquid that provides a stronger, harder bond. California prohibits the use of which chemical in nail enhancement products due to documented health risks?
- AAcetone
- BEthyl methacrylate (EMA)
- CMethyl methacrylate (MMA)
- DIsopropyl alcohol
Show answer & explanationAnswer & explanation
Correct answer: C. Methyl methacrylate (MMA)
Methyl methacrylate (MMA) is banned for use in nail enhancement products in California because it can cause nail bed damage, allergic reactions, and difficulty removing product safely. Ethyl methacrylate (EMA) is the legal alternative used in most acrylic systems.
Why the other options are wrong
- A. Incorrect — acetone is a legal nail polish/product remover, not a banned enhancement chemical.
- B. Incorrect — EMA is the legal, standard monomer used in acrylic nail systems.
- D. Incorrect — isopropyl alcohol is a legal, common sanitizing agent.
MMA Ban in Nail Products
Methyl methacrylate (MMA) is a banned monomer in California nail enhancement products due to its link to nail bed injury, allergic reactions, and respiratory irritation.
- MMA was historically used but is now illegal in nail enhancement liquids
- EMA (ethyl methacrylate) is the approved substitute
- MMA products often have a very strong odor and low cost as red flags
- Use of MMA can cause permanent nail damage and product removal difficulty
Memory trick: MMA = 'Major Mistake, Avoid' — banned for nail bed harm.