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IN VITRO STUDIES FURTHER DETAILS

In Vitro Study No: 684

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

2-Nitro-1,4-Benzenediamine

See Notes

0.0047

Semi-Permenant Hair Dye Formulation

Human

Not Given

Abdomen

0.64

Flow-through

HHBSS pH 7.4

Not Given

0.5

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)
63.8	0.31		1.6	2.5		9.5	3.16	7.1	1.56				8

% Recovery

+/-

% In Stratum Corneum

+/-

% in Viable Skin

+/-

% Penetrated

+/-

% Absorbed

+/-

s-s-flux (mcrg/cm2/h)

+/-

kp (cm/h)

Lag Time (h)

63.8

0.31

1.6

2.5

9.5

3.16

7.1

1.56

NOTES

The semi-permenant Hair dye formulation was applied at a dose of 7.8mg/cm2. Barrier integrity of the skin was checked with tritiated water. For further Experimental Detail see J. Soc. Cosmet. Chem. 48 187-197 (1997)

REFERENCE

Percutaneous Penetration And Metabolism Of 2-Nitro-p-phenylenediamine In Human And Fuzzy Rat Skin (2000) Toxicol. Appl. Pharmacol., 166 :13-23