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avobenzone

Description

Avobenzone, also known as butyl methoxydibenzoylmethane, is a crucial organic compound widely used in sunscreen formulations. This oil-soluble ingredient belongs to the class of dibenzoylmethane derivatives and functions as a highly effective UVA filter. Avobenzone absorbs a broad spectrum of UVA radiation, with peak absorption at 360 nanometers, providing significant protection against long-wave ultraviolet light.

The effectiveness of avobenzone lies in its ability to undergo rapid photoisomerization upon exposure to UV light, allowing it to dissipate absorbed energy as heat. However, this process can lead to photodegradation, potentially reducing its protective capacity over time. To mitigate this, avobenzone is often combined with photostabilizers like octocrylene or antioxidants.

Typically used at concentrations between 2-3% in sunscreen formulations, avobenzone is approved by regulatory bodies worldwide, including the FDA and EMA. While generally well-tolerated, some individuals may experience skin sensitization. Its efficacy in preventing premature skin aging and reducing the risk of skin cancer has made avobenzone a staple in broad-spectrum sun protection products. However, formulators must carefully balance its inclusion with other UV filters and stabilizing agents to ensure optimal performance and safety.