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EC number: 200-315-5
CAS number: 57-13-6
Appreciable levels of urea are naturally present in the human epidermis.
The total content of urea in a 2.5 cm2sample of human skin
was measured to be 23 µg (Wellner & Wohlrab, 1992). Tabachnick & Labadie
(1970) report the total urea in conventional albino guinea pig epidermis
to be 37.7 µmoles/gm wet wt.
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