4-Butylresorcinol is a high-efficacy resorcinol derivative widely used in brightening and anti-pigmentation skincare. It works by strongly inhibiting tyrosinase, limiting melanin oxidation, and promoting the breakdown of existing tyrosinase—helping visibly improve uneven skin tone, dark spots, and overall skin dullness.

Supplied as a white to off-white powder, it dissolves in both oil and alcohol, making it easy to incorporate into serums, lotions, creams, and oil-based treatments. With a typical usage level of 0.1–2.2%, 4-Butylresorcinol delivers potent brightening performance while maintaining formulation stability and compatibility.
Effectively targets dark spots, melasma, and hyperpigmentation with high tyrosinase-inhibition efficiency, pairs well with niacinamide, arbutin, and tranexamic acid, and is ideal for brightening, spot-correcting, and evening-tone formulations.