benzophenone


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benzophenone

[¦ben·zō·fə′nōn]
(organic chemistry)
C6H5COC6H6 A diphenyl ketone, boiling point 305.9°C, occurring in four polymorphic forms (α, β, γ, and δ) each with different melting point; used as a constituent of synthetic perfumes and as a chemical intermediate. Also known as diphenyl ketone; phenyl ketone.
References in periodicals archive ?
In addition, FDA is amending the food additive regulations to no longer allow the use of benzophenone as a plasticizer in rubber articles intended for repeated use in contact with food.
Benzophenone-bis-Schiff bases 1-17 were synthesized by reacting commercially available benzophenone Schiff base and different aromatic aldehydes in anhydrous methanol in the presence of few drops of acetic acid.
Benzophenones, chemical ultraviolet light absorbers used in products ranging from sunscreens and hair sprays to plastic lens filters for color photography, have been named the American Contact Dermatitis Society's 2014 Contact Allergen of the Year.
4-(Trimethyl ammoniummethyl) benzophenone chloride was supplied by "The Associated Octel Ltd., Widnes, Great Britain," and used without further purification.
However, a new absorption band around 3450 [cm.sup.-1] assigned to the--OH stretching vibration, a strong absorption at 1623 [cm.sup.-1] corresponding to C--O in benzophenone, absorption peaks at 1507 and 703 [cm.sup.-1] associated with benzene rings, arid a weak peak at 1340 [cm.sup.-1] originating from C--0 stretching vibration in benzophenone are also observed (Fig.
(12) In fact, the very commonly used benzophenones and salicylates demonstrate more antiandrogenic activity than that of flutamide, the antiandrogen drug given to prostate cancer patients to stop the influence of testosterone in the effort to slow prostate cancer growth.
London, June 3 ( ANI ): Benzophenone, a sunscreen ingredient, has been found to be associated with an increased risk of the painful gynaecological condition endometriosis.
The main chemistries of UV absorbers are hydroxy benzophenone, hydroxy phenyl benzotriazoles (BTZ), and hydroxy phenyl triazines (triazines).
Line of uv stabilizers from hindered amine to benzophenone systems available as dry powder (unitized or bulk-packed) and palletized concentrate.
Polymeric photoinitiators containing in-chain benzophenone and coinitiators amine: Effect of the structure of coinitiator amine on photopolymerization.
#7063861, is titled "Bioavailable Composition of Natural and Synthetic HCA." GarCitrin is a patented natural extract combining the weight management benefits of hydroxycitric acid (HCA) with the bioavailability-enhancing effects of garcinol, a polyisoprenylated benzophenone isolated from Garcinia cambogia and Garcinia indica.
These acids are the building blocks for ceramides, which are needed for healthy lipids.* Sunscreens: Octyl methoxy cinnamate, persol MCX and benzophenone help protect skin from ultraviolet rays.* Vitamins/Antioxidants: Retinyl acetate, retinol or retinyl palmitate (vitamin A), panthenol (vitamin B5), ascorbic acid (vitamin C), tocopherol acetate (vitamin E), green tea extract and grapeseed oil help fight cell-damaging free radicals.* Occlusives: Petrolatum, petroleum jelly and dimethicone aid in retaining moisture and keeping out harsh elements.