Phenylethyl Resorcinol
Phenylethyl Resorcinol (4-(1-phenylethyl)-1,3-benzenediol; SymWhite 377; CAS 85-27-8) is a synthetic cosmetic ingredient. The CAS number, name, formula (C14H14O2), and molecular weight (214.26 g/mol) are consistent with the supplied product record. The material is described there as a white to off-white powder of cosmetic grade (≥99% assay). Its principal cosmetic use is in topical formulations intended to improve the appearance of uneven skin tone.
Its reported activity is inhibition of tyrosinase, an enzyme involved in melanin production, and it is consequently used in skin-brightening formulation concepts. This is a cosmetic ingredient, not an established treatment for melasma or other disease, and ingredient-level activity does not establish finished-product efficacy or safety. Any marketing claims, finished-product testing, and use must be assessed under applicable local cosmetic requirements; no general approval or concentration recommendation is implied here.
– Skin-care creams, serums, and related leave-on products: used as a cosmetic brightening ingredient in formulations intended to improve the appearance of uneven tone. Substantiate appearance-related claims on the finished product and avoid representing the ingredient as a treatment for pigmentation disorders.
– Spot-care and tone-evening products: a formulation option where tyrosinase-inhibitory activity is relevant to the product concept. Select the appropriate cosmetic-grade specification and evaluate finished-formula compatibility and stability; performance should not be inferred from the raw-material identity alone.
– Cosmetic formulation development: research may examine tyrosinase-related activity and delivery approaches, but research findings do not establish clinical efficacy.
Product Name: Phenylethyl Resorcinol
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