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Sunscreen, also known as sunblock, [a] sun lotion or sun cream, is a photoprotective topical product for the skin that helps protect against sunburn and prevent skin cancer. Sunscreens come as lotions , sprays, gels, foams (such as an expanded foam lotion or whipped lotion [ 4 ] ), sticks, powders and other topical products.
It is in rutile crystal structure and coated with silica or/and alumina to prevent photocatalytic phenomena. The health risks of ultrafine TiO 2 from dermal exposure on intact skin are considered extremely low, [1] and it is considered safer than other substances used for ultraviolet protection. However titanium dioxide is a known carcinogen. [2]
In cosmetic and skin care products, titanium dioxide is used as a pigment, sunscreen and a thickener. As a sunscreen, ultrafine TiO 2 is used, which is notable in that combined with ultrafine zinc oxide , it is considered to be an effective sunscreen that lowers the incidence of sun burns and minimizes the premature photoaging ...
Avobenzone in sunscreen may stain clothes yellow-orange and make them sticky if washed in iron-rich water, as it reacts with iron to produce rust. The damage can be undone with a rust remover or stain remover. [34] [35] The staining properties of sunblock made with avobenzone are particularly noticeable on fiberglass boats with white gelcoat.
Ensulizole (INN; [1] also known as phenylbenzimidazole sulfonic acid) is a common sunscreen agent. In 1999, the United States Food and Drug Administration regulated that the name ensulizole be used on sunscreen labels in the United States. Ensulizole is primarily a UVB protecting agent providing only minimal UVA protection.
It is the most effective UV absorber available measured by SPF, based on the maximum concentration permitted by European legislation. [ 8 ] As of 2022, [ 9 ] bemotrizinol is not approved by the United States Food and Drug Administration for use in sunscreens, but has been approved in the European Union since 2000 [ 10 ] and some other parts of ...