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Hydroquinone, also known as benzene-1,4-diol or quinol, is an aromatic organic compound that is a type of phenol, a derivative of benzene, having the chemical formula C 6 H 4 (OH) 2. It has two hydroxyl groups bonded to a benzene ring in a para position.
Hydroquinone is used to reduce the activated silver ions to metallic silver. During this process, hydroquinone is oxidized to quinone. All silver halide not activated by light or reduced by hydroquinone is removed, leaving a negative by deposited silver where the film had been struck by light.
Arbutin is glucosylated hydroquinone, [13] and may carry similar cancer risks, [14] [unreliable source?] although there are also claims that arbutin reduces cancer risk. [15] The German Institute of Food Research in Potsdam found that intestinal bacteria can transform arbutin into hydroquinone, which creates an environment favorable for ...
The beetles' glands store enough hydroquinone and hydrogen peroxide to allow the beetle to release its chemical spray roughly 20 times. In some cases this is enough to kill a predator. [ 6 ] The main component of the beetle spray is 1,4-benzoquinone, an irritant to the eyes and the respiratory system of vertebrates.
For this purpose, concentrations of up to 2% α-arbutin are found in face creams and serums and 0.5% in body creams. [ 1 ] α-Arbutin showed a significant reduction in melanin synthesis in cultured human melanoma cells and a three-dimensional human skin model, with melanin synthesis reduced to 40% of the control, indicating its potency as a ...
Long-term management may include Rx options like hydroquinone and oral meds (you’ll have to wait until you’re done breast- feeding). Sun is another major factor in melasma, so load up on SPF ...
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