Liquid Octyl Methoxycinnamate is a liquid chemical compound commonly used as an active ingredient in sunscreens and other cosmetic products to provide UVB (ultraviolet B) protection. It is an oil-soluble, clear liquid with a slightly yellowish color. It functions as a UV filter by absorbing UVB rays and preventing them from penetrating the skin. When applied topically, Liquid Octyl Methoxycinnamate forms a thin film on the skin's surface, which helps to scatter and reflect UV radiation away from the skin. It can be used in combination with other sunscreen agents to provide broad-spectrum protection against both UVA (ultraviolet A) and UVB rays.