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The conduct of a scientifically sound safety assessment of new ingredients and finished products is essential prior to their introduction into the marketplace. Such assessments are based on a risk assessment paradigm established by the National Academy of Science (NAS, 1983) that consists of a four-step process: hazard identification, dose-response assessment, exposure assessment, and risk characterization. This risk assessment paradigm has been (1) used as a framework for estimating an adverse health risk posed by environmental chemicals, and (2) applied to systemic toxicological endpoints. The general principles of risk assessment may be applied to skin safety evaluation of consumer products, considering that dermal toxicity is also a threshold phenomenon. This study describes a risk assessment-based approach for skin safety evaluation of laundry detergent products. [ABSTRACT FROM AUTHOR]