Whitening agent containing crystalline molecular complex of hydroquinone and surfactant
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United States of America Patent
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Issued Date -
Jun 29, 2006
app pub date -
Sep 10, 2003
filing date -
Sep 10, 2002
priority date (Note) -
Abandoned
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Abstract
There are provided a hydroquinone-containing whitening agent having high storage stability and sustained release of hydroquinone, a process for production of the whitening agent, and a whitening method for skin which employs the whitening agent. The whitening agent of the invention comprises a crystalline molecular complex composed of hydroquinone or a derivative thereof and a surfactant, wherein formation of the molecular complex improves the storage stability of the hydroquinone-containing whitening agent against heat, oxygen and light, while the hydroquinone is gradually released for a sustained whitening effect of the whitening agent.
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