Safety Study to Evaluate the Contact Sensitizing Potential of Topically Applied ZuraPrep™ and ZuraPrep™ Without IPA

Inclusion Criteria: * Subjects may be of either sex, at least 18 years of age and of any race * Subjects must be free of tattoos, sunburn, dermatoses, cuts, lesions or other disorders of the skin of the back. * Subjects must be in good general health Exclusion Criteria: * Known allergies to latex, metals, tape and/or adhesives, soap, citric acid, methylene blue, methylparaben, propylparaben, chlorhexidine gluconate, isopropyl alcohol, and sodium lauryl sulfate. * Exposure of the back region to antimicrobial agents, medicated soaps, medicated shampoos, medicated lotions, strong detergents, sun-tanning, use of tanning beds, or swimming or soaking in pools or hot tubs, in the 7 days prior to, or during the 3-week test period. * Use of topical or systemic corticosteroid, antihistamine, or anti-inflammatory medications in the 7 days prior to, or during the 3-week test period. * Current or recent severe illness such as asthma, diabetes, hepatitis, organ transplant, mitral valve prolapse, congenital heart disease, internal prostheses, or any immunocompromised condition such as AIDS or HIV positive. * Pregnancy, plans to become pregnant, breast-feeding * Any active skin rash or breaks in the skin of the back * Any sunburn or tattoos on the skin of the back * Current active skin disease or inflammatory skin condition including contact dermatitis * Participation in a clinical study in the past 7 days or current participation in another clinical study * Any medical condition or use of any medications that, in the opinion of the Principal Investigator, would preclude participation * Unwillingness to fulfill the performance requirements of the study