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 this work, the GC-MS analysis of the propolis extracts showed that major compounds of propolis from Cundinamarca were rich in diterpenic acids; while that of the propolis from Antioquia and Huila regions, were rich in prenylated benzophenones and triterpenes respectively (Table 1).
It is a rich source of xanthones, benzophenones, flavonoids, biflavonoids and triterpenes [2, 3] of significant antimicrobial, anti- inflammatory, antioxidant, anticancer and anti HIV activities [4-6].
Background: Garcinielliptone FC (GFC) is a tautomeric pair of polyprenylated benzophenone, which has proven to have antiepileptic, cytotoxic and antioxidant activity.
First used as a preserver to extend the shelf life of paints, varnishes, and other industrial products, benzophenones were added to sunscreens in the 1950s.
The bulky benzophenone group has no steric hindrance effect on the reactivity of BPMA, which based on the fact that benzophenone group is far away from the active center methacryloxy.
Like benzophenones, phenols, and parabens, DCB has been reported to have both in vitro EDC activity and EDC effects in laboratory animals [Darbre and Harvey 2008; Fang et al.
The ultraviolet filter benzophenone 2 interferes with the thyroid hormone axis in rats and is a potent in vitro inhibitor of human recombinant thyroid peroxidase.
Its relationship with Viachem, a supplier of specialty and fine chemicals, enables the company to increase market share for its MAXGARD brand of substituted benzophenones, according to Jimmy Wooten, global product manager for Syrgis Performance Specialties.
Benzhydrylamines can be synthesized from benzophenones by the Leuckart reaction via the intermediate benzhydrylformamides.
Benzophenones have received mixed reviews; their use in sunscreen products now warrants a warning label in the European Union.
They found that four sunscreen chemicals--parabens, cinnamates, benzophenones and a camphor derivative--cause the viruses to replicate until their algae hosts explode, spilling virus particles into the surrounding seawater, where they can infect neighbouring coral communities.
Benzophenones (oxybenzone absorbs UVB and UVA2), anthranilates, avobenzone and Bisethylhexyloxy phenol methoxy phenyl triazene (which gives photo stability to avobenzone) are UVA blockers3.