Skin Sensitization

Skin sensitization, a key focus of chemical safety assessments, is the process by which a substance induces an allergic reaction in the skin after repeated exposure. This reaction is typically mediated by T-cell activation, which triggers allergic contact dermatitis (ACD) in sensitized individuals. Regulatory frameworks, such as REACH, have evolved to ensure that substances used in consumer products, including cosmetics and industrial chemicals, are safe for human exposure. For regulatory professionals, understanding the testing requirements and available methodologies for skin sensitization is crucial.

An overview of the four main routes of chemical exposure — inhalation, dermal absorption, ingestion, and injection — and how each affects toxicity risk assessment.

Explore the fundamental dose-response relationship in toxicology — the principle that “the dose makes the poison” — and how it shapes risk assessment for chemical substances.