A product containing aniline derivatives requires a skin patch test.

A product containing aniline derivatives requires a skin patch test.

• A. They are always temporary
• B. A skin patch test is not required
• C. They may be applied to the eyelashes
• D. A skin patch test is required

Answer: (D)

Aniline derivatives can trigger allergic skin reactions, so a patch test is required before using products that contain these chemicals. This test helps identify someone who is sensitized, preventing a potentially severe reaction when the product is applied more broadly. The test involves applying a small amount of the product to a patch of skin (often the inner forearm or behind the ear) under occlusion for about 24–48 hours, then checking for redness, itching, or swelling. If a reaction occurs, the product should not be used on the client. This safety step is why a patch test is required. Statements suggesting it’s unnecessary or that it’s safe to apply to the eyelashes without testing don’t fit, since these derivatives can still provoke reactions.

Aniline derivatives can trigger allergic skin reactions, so a patch test is required before using products that contain these chemicals. This test helps identify someone who is sensitized, preventing a potentially severe reaction when the product is applied more broadly. The test involves applying a small amount of the product to a patch of skin (often the inner forearm or behind the ear) under occlusion for about 24–48 hours, then checking for redness, itching, or swelling. If a reaction occurs, the product should not be used on the client. This safety step is why a patch test is required. Statements suggesting it’s unnecessary or that it’s safe to apply to the eyelashes without testing don’t fit, since these derivatives can still provoke reactions.