The peeling of "fenol atenuado", often referred to in the context of chemical peels in dermatology, typically involves a diluted form of phenol (C₆H₅OH) as its primary active ingredient. It may also include other components to balance the pH, enhance exfoliation, or moisten the skin.

The basic chemical composition includes:

1. Phenol (C₆H₅OH): The main component, which acts as a chemical exfoliant.
2. Water (H₂O): Often used to dilute phenol for safe application.
3. Acetic Acid (CH₃COOH) or Glycolic Acid (C₂H₄O₃): Sometimes added to enhance the peeling effect or adjust the pH.
4. Other Excipients: Depending on the formulation, other compounds may be included to aid in skin hydration, reduce irritation, or enhance the overall stability of the product.

For detailed formulations, one would typically refer to specific product labels or scientific literature.