A product must indicate if it contains more than what percentage of methyl salicylate?

The correct answer is that a product must indicate if it contains more than 5% of methyl salicylate. This requirement is based on regulatory guidelines aimed at ensuring patient safety and proper labeling of products containing active ingredients that may have significant effects on health.

Methyl salicylate is a topical analgesic commonly found in products used for muscle and joint pain relief. When present in concentrations over 5%, there are potential safety risks, including skin irritation and systemic toxicity, especially if used over large areas of the skin or under occlusive dressings. Therefore, labeling becomes essential to inform consumers of the risks associated with higher concentrations, allowing them to make safe choices regarding the use of such products.

The other percentages indicated in the choices are not associated with the labeling requirement for methyl salicylate. Concentrations lower than 5% typically do not pose significant risk concerns that necessitate such labeling, which is a critical distinction in the regulation of over-the-counter topical medications.