IN VITRO STUDIES FURTHER DETAILS
In Vitro Study No: 670
METHODS
Chemical
Conc. (mg/ml)
Volume (ml)
Loading (mg/cm2)
Vehicle
Species
Membrane
Site
Area (cm2)
Cell Type
Receptor Fluid
Temp. (oC)
Temp. Measured
Exposure Time (h)
Study Length (h)
Occluded
Analytical Method
Coumarin
0.2
0.005
0.0037
Ethanol
Human
Full Thickness Skin
Breast
0.32
Flow-through
HEPES buffered HBSS & 0.5% gentamycin
32
Skin
72
72
2
Radiolabelled (14C)
RESULTS
% Recovery
+/-
% In Stratum Corneum
+/-
% in Viable Skin
+/-
% Penetrated
+/-
% Absorbed
+/-
s-s-flux (mcrg/cm2/h)
+/-
kp (cm/h)
n
Lag Time (h)
74.6
6.5
6.5
10.2
60.2
50.4
9.1
0.0752
9
1.1
NOTES
3 replicates of skin from 3 humans was used in this study.
REFERENCE
Comparative In Vitro Skin Absorption And Metabolism Of Coumarin (1,2-Benzopyrone) In Human, Rat and Mouse (1997) Toxicol. Appl. Pharmacol., 145 :34-42