Oxybenzone

Oxybenzone

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Chemical synthesis of oxybenzone

Oxybenzone, also known as benzophenone-3, is an organic compound that is used in many sunscreens and other personal care products. It is a type of benzophenone, which is a class of aromatic ketones that are used as ultraviolet (UV) filters. Oxybenzone is known for its ability to absorb UVB and short-wave UVA rays, making it an effective ingredient in protecting the skin from the harmful effects of the sun.

Chemical Structure and Properties

Oxybenzone has the chemical formula C₁₄H₁₂O₃ and a molecular weight of 228.24 g/mol. It is a white to pale yellow solid that is soluble in most organic solvents. The compound consists of two phenyl rings connected by a carbonyl group, which is characteristic of benzophenones.

Mechanism of Action

Oxybenzone works by absorbing UV radiation and dissipating it as heat, thereby preventing the UV rays from penetrating the skin. This absorption occurs primarily in the UVB range (280-320 nm) and to a lesser extent in the UVA range (320-400 nm). By protecting the skin from UV radiation, oxybenzone helps to prevent sunburn, premature aging, and skin cancer.

Uses

Oxybenzone is widely used in sunscreen formulations due to its effectiveness in absorbing UV radiation. It is also found in other personal care products such as lip balms, moisturizers, and hair sprays. In addition to its use in cosmetics, oxybenzone is used in plastics and fabrics to prevent UV degradation.

Safety and Environmental Concerns

There has been some controversy regarding the safety of oxybenzone. Concerns have been raised about its potential to cause allergic reactions and hormonal disruption. Additionally, oxybenzone has been detected in water sources and is believed to contribute to coral reef bleaching. As a result, some regions have banned the use of oxybenzone in sunscreens.

Related Pages

• Sunscreen
• Ultraviolet radiation
• Skin cancer
• Coral reef