| 21. | In medical literature, hydroquinone is considered the primary topical ingredient for inhibiting melanin production.
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| 22. | Research has shown hydroquinone and tretinoin to prevent sun-or hormone-induced melasma.
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| 23. | However, classic lithographic developers using hydroquinone alone suffers very poor tray life and inconsistent results.
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| 24. | In 1880, he introduced hydroquinone.
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| 25. | Hydroquinone is thought to be the active toxin in " Agaricus hondensis " mushrooms.
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| 26. | Hydroquinone has been shown to be one of the chemical constituents of the natural product propolis.
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| 27. | Hydroquinone, like other benzene, derivatives can cause skin problems and is undesirable in quantity effluent
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| 28. | Chua said there were only seven skin whitening creams containing hydroquinone registered with the Drug Control Authority.
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| 29. | Hydroquinone is sometimes combined with alpha hydroxy acids that exfoliate the skin to quicken the lightening process.
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| 30. | Some medications have been created that combine 4 % hydroquinone with tretinoin and a form of cortisone.
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