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Long-term exposure to formaldehyde can potentially lead to which of the following?

  1. Skin irritation and rash

  2. Heart disease

  3. Allergies

  4. Diabetes

The correct answer is: Skin irritation and rash

Long-term exposure to formaldehyde is known to primarily cause skin irritation and rash among other health issues. This chemical is often used in various industries, including in beauty and personal care products. When individuals are exposed to formaldehyde over extended periods, it can lead to a range of dermatological reactions, including dermatitis characterized by redness, itching, and skin lesions. While formaldehyde exposure can have other health effects as well, including respiratory issues and potential connections to certain cancers, the immediate skin-related problems are the most relevant to this question. Understanding the properties of formaldehyde and its health implications is critical for estheticians and those in the field of esthetics, as they need to be aware of the ingredients in the products they use and their potential effects on clients.