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Bleaching Agents - Hydroquinone

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shevyatiwari's version from 2015-04-18 02:42

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Question Answer
Hydroquinone
Reduces melanocyte pigment production throguh degradation of melanin, tyrosinase, phenol oxidases into highly reactive oxygen radicalsT
Hydroquinone can oxidise its tube to brownT
If a tube has gone brown it means it is now ready to useF, it is ineffective and should be discarded
Comes in 2%, and 3-4%T
Often combined with glycol acid to increase absorption and concentrationT
Broad spectrum sunscreens reduce its efficacyF, increase its functionality
Retinoids can reduce efficacyF
Allergic and irritation contact can be managed with topical steroidsT
Can cause ochronosis (irreversible exogenous pigmentation) at concentrations of 3-4%F, 6-8%
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