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4-METHYLBENZYLIDENE CAMPHOR

Description

4-Methylbenzylidene camphor (4-MBC) is a synthetic organic compound widely used in sunscreen formulations as an effective UVB filter. This white, crystalline substance belongs to the class of camphor derivatives and is known for its ability to absorb ultraviolet radiation, particularly in the UVB spectrum (280-320 nm).

The molecular structure of 4-MBC consists of a camphor skeleton with a methylbenzylidene group attached, giving it its UV-absorbing properties. It is oil-soluble, making it compatible with various cosmetic formulations, including lotions, creams, and sprays. 4-MBC typically provides a sun protection factor (SPF) between 4 and 6 when used at its maximum allowed concentration.

While effective, 4-MBC has been subject to scrutiny due to potential environmental and health concerns. Some studies suggest it may have weak estrogenic effects and bioaccumulate in aquatic environments. As a result, its use is regulated in many countries, with restrictions on concentration levels in sunscreen products.

Formulators often combine 4-MBC with other UV filters to achieve broad-spectrum protection and higher SPF ratings. Its stability in sunlight and compatibility with other cosmetic ingredients make it a valuable component in sun care products, despite ongoing debates about its long-term safety and environmental impact.