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Alkali metals reduce benzophenone to the deeply blue colored radical anion, diphenylketyl: [15] M + Ph 2 CO → M + Ph 2 CO •−. Generally sodium is used as the alkali metal. Sodium-benzophenone ketyl is used in the purification of organic solvents, particularly ethers, because it reacts with water and oxygen to give non-volatile products.
surfactant used as a detergent and emulsifier propane: propane CH 3 CH 2 CH 3: propellant (pressurized dispenser) paraben: preservative peg-20: a variety of Polyethylene glycol: often used as an ointment base polymethyl methacrylate (PMMA) [7] (C 5 O 2 H 8) n: palmitic acid: CH 3 (CH 2) 14 COOH paraffinum liquidum: petrolatum: C 15 H 15 N ...
This substance can leach from food packaging, and is widely used as photo-initiators to activate a chemical that dries ink faster. [14] Despite its photoprotective qualities, much controversy surrounds oxybenzone because of possible negative hormonal and photoallergenic effects, leading many countries to regulate use in sunscreen products.
It and its derivatives are found in cosmetics, plastics, films, adhesives and coatings, optical fiber, and printed circuit boards. It is the precursor to certain polycarbonate polymers. [ 2 ]
Dioxybenzone (benzophenone-8) is an organic compound used in sunscreen to block UVB and short-wave UVA (ultraviolet) rays. [2] It is a derivative of benzophenone. It is a yellow powder with a melting point of 68 °C. It is insoluble in water, but moderately soluble in ethanol and isopropanol.
Castor oil and its derivatives are found in many cosmetics as it is "non-comedogenic" (does not exacerbate or contribute to acne). [3]Cerebrosides (cells from the nervous systems of cattle or swine) were once used in some high-end skin-care products to increase moisture retention and to create a smooth skin surface, [4] however the BSE controversy has put an end to this practice.
Sulisobenzone (benzophenone-4) is an ingredient in some sunscreens which protects the skin from damage by UVB and UVA ultraviolet light. [ 2 ] [ 3 ] Its sodium salt, sulisobenzone sodium , is also referred to as benzophenone-5 .
Benzophenone, the base structure of these sunscreening agents Benzphenone-1 – benzophenone-12 ( BP-1 –BP-12 ) are UV A/UVB absorbers. Some of them are used in sunscreens .