Product Chemistry, Ingredients, and Safe Handling
Core Chemistry
Nail products are chemical systems. Acrylics cure by polymerization of monomers (commonly ethyl methacrylate) initiated by a catalyst (benzoyl peroxide) when liquid meets powder. Gels are photoinitiated oligomers cured by UV or LED light. Polish dries by solvent evaporation. Resins and glues cure by evaporation or moisture. Know that "cure" means a chemical change and "dry" means solvent loss - a distinction exam writers use.
Key Ingredients and Hazards
Monomers, primers, and adhesives can cause allergic contact dermatitis and sensitization, which is permanent - once sensitized, a client or technician reacts to even tiny exposures. Solvents and vapors irritate eyes and airways. Dust from filing is an inhalation and eye hazard. Some products contain methacrylates; labels must be followed. Never use a product in an unlabeled container, and never transfer product into a beverage bottle or food container.
Safe Handling
Ventilation, local exhaust, and covered monomer dishes reduce vapor exposure. Wear gloves and eye protection, avoid skin contact, and wash thoroughly. Store products away from heat and flame, keep lids tight, and dispose of waste per label and local rules. Do not mix brands of liquid and powder unless the manufacturer says they are compatible. Never add monomer to a used dish.
Worked Example
A technician develops itchy, cracked skin on the fingertips after months of work. Likely cause: repeated monomer contact causing sensitization. Correct response: stop contact, seek medical evaluation, and improve glove use and handling.
Rule of thumb: if you cannot read the label and the safety data, do not use the product.