Which substance is commonly associated with a chemical peel that has a pH lower than 3?

Trichloroacetic acid (TCA) is widely recognized for its use in chemical peels, particularly because it has a low pH, often lower than 3. This characteristic allows TCA to penetrate the skin effectively, resulting in a significant exfoliating effect that can improve skin texture and treat various skin conditions, including hyperpigmentation and wrinkles.

The low pH indicates a more acidic environment, which enhances the peeling process. TCA is effective at various concentrations, enabling estheticians to tailor treatments according to the client's needs and skin types. Its ability to induce deeper peeling makes it a popular choice for more advanced chemical peel procedures.

In contrast, while substances like salicylic acid and glycolic acid are also used in chemical peels, they typically have higher pH levels and are often employed for lighter peels. Jessner's solution, a combination of several ingredients, generally does not have a pH as low as TCA. Thus, TCA stands out for its efficacy and characteristics linked to a low pH in the context of chemical peels.