What is a common chemical used in nail products that is a potential irritant for some clients?

Formaldehyde is commonly used in various nail products, such as nail hardeners and some types of nail polish. It functions as a bonding agent and preservative, helping to enhance the durability and longevity of the products. However, it is recognized as a potential irritant for some clients, especially those with sensitive skin or pre-existing allergies. Exposure to formaldehyde can lead to symptoms such as skin irritation, allergic reactions, or respiratory issues in susceptible individuals.

In contrast, substances like Vitamin E, silicone, and biotin are generally considered beneficial rather than irritating when used in nail and beauty products. Vitamin E is often included for its moisturizing properties, silicone is favored for its smooth application and finish, and biotin is a vitamin associated with promoting nail strength and health. Thus, while they do have their specific uses and benefits, they are not known to commonly induce irritation in clients as formaldehyde may.