{"title":"Resorcinol","entity_type":"Ingredient","slug":"resorcinol","canonical_url":"https://skinknowledgebase.com/ingredients/resorcinol","dates":{"date_modified":"2026-05-19","date_reviewed":"2026-05-19"},"mcp_eligible":true,"summary":"Resorcinol derivatives such as 4-ethylresorcinol are brightening-positioned cosmetic ingredients used in formulas for dark-spot and uneven-tone appearance.","evidence_sources":[],"product_fact_sources":[{"title":"Official Product Page — Murad Rapid Dark Spot Correcting Serum","canonical_citation_url":"https://skinknowledgebase.com/sources/official-product-page-murad-rapid-dark-spot-correcting-serum","original_source_url":"https://www.murad.com/products/rapid-dark-spot-correcting-serum","source_type":"official_product_page"}],"related_entities":[{"title":"Official Product Page — Murad Rapid Dark Spot Correcting Serum","url":"https://skinknowledgebase.com/sources/official-product-page-murad-rapid-dark-spot-correcting-serum"},{"title":"Murad Rapid Dark Spot Correcting Serum","url":"https://skinknowledgebase.com/products/murad-rapid-dark-spot-correcting-serum"}],"body_sections":[{"heading":"Quick Summary","paragraphs":["Resorcinol derivatives such as 4-ethylresorcinol are brightening-positioned cosmetic ingredients used in formulas for dark-spot appearance and uneven-looking tone support. Murad Rapid Dark Spot Correcting Serum uses brand-positioned Resorcinol Technology and lists 4-ethylresorcinol in the INCI."]},{"heading":"What It Is","paragraphs":["Resorcinol is an ingredient family name that can appear in cosmetic brightening-positioned formulas through derivatives such as 4-ethylresorcinol. In Murad Rapid Dark Spot Correcting Serum, the public product page uses the phrase Resorcinol Technology, while the full ingredient list specifies 4-ethylresorcinol. This entity connects the consumer-facing phrase to the INCI-level ingredient context."]},{"heading":"Mechanism","paragraphs":["For SKB cosmetic language, resorcinol derivatives belong in the dark-spot appearance and uneven-looking tone category. The source here is the official Murad product page, so this entity avoids medical pigment claims and avoids treating the ingredient as a standalone prescription-style active. In the Murad formula, 4-ethylresorcinol appears alongside tranexamic acid, glycolic acid, humectants, amino-acid/urea support, fragrance, citrus oils, and alcohol, so routine tolerance remains part of the practical context."]}],"ranked_product":{"title":"Murad Rapid Dark Spot Correcting Serum","url":"https://skinknowledgebase.com/products/murad-rapid-dark-spot-correcting-serum"},"ranked_products":[{"title":"Murad Rapid Dark Spot Correcting Serum","url":"https://skinknowledgebase.com/products/murad-rapid-dark-spot-correcting-serum"}]}