Table 2 Units and approximate ranges of various features in the epidermis.

From: A database of chemical absorption in human skin with mechanistic modeling applications

Feature Name

Units

Range of Values

Diffusion Coefficient (D)

cm2/s

6.684 × 10−12 to 1.318 × 10−6

Permeability Coefficient (logkp)

cm/s

− 8.14 to − 3.78

Extent of Linearity

hours

3.931 to 22

Experimental Lag Time

hours

0.382 to 6.434