Phenylethyl Resorcinol CAS 85-27-8

What Phenylethyl Resorcinol Is

Phenylethyl resorcinol, chemically 4-(1-phenylethyl)benzene-1,3-diol, is a resorcinol derivative with a phenylethyl side chain (C₁₈H₂₆O). It arrives as a white to off-white crystalline powder and is known in the trade as 377 or the SymWhite 377 type active. The ingredient targets the tyrosinase step in melanin formation and is used to brighten, even tone and lessen the look of pigmentation and age spots, with some antioxidant character. Because it barely dissolves in water, it is solubilized in alcohol, glycols, glycerin or the oil phase, usually with gentle heat, and finished products are protected from light and oxidation. UATChem supplies cosmetic grade material, with purity on the COA for each lot.

Skin Brightening and Cosmetic Uses

• Brightening serums and spot care. The core active in tone evening serums and treatments aimed at dark spots, post acne marks and uneven pigmentation.
• Creams, lotions and toners. Added to whitening creams, lotions, toners and masks for dull or uneven skin tone.
• Tone evening blends. Often combined with niacinamide, vitamin C or arbutin in multi active brightening systems, with each formula setting its own dosage and pH.

Typical Specifications

Cosmetic grade purity is reported on the COA for each lot; the table below identifies the ingredient and its handling properties.

Packaging, Documents and Ordering

• Packed as a powder in fiber drums or 25 kg drums with sealed liner, palletized; packs stay tightly closed, dry, shaded and away from heat to protect the active from oxidation and color change.
• Phenylethyl resorcinol is a cosmetic brightening ingredient, and whitening claims and finished product dosage or registration follow local cosmetic rules, with brightening treated as a special claim in some markets. Every lot carries a COA and TDS with purity, plus SDS, and samples are supported.
• For a quote, UATChem needs the quantity, packing and destination port.

FAQ

Q: What is phenylethyl resorcinol used for?

A: Phenylethyl resorcinol is a brightening active in serums, spot care, creams and lotions that evens tone and fades dark spots.

Q: How do you dissolve phenylethyl resorcinol?

A: It barely dissolves in water, so the powder is dissolved in alcohol, glycols, glycerin or oil with gentle heat before adding.

Q: Is phenylethyl resorcinol the same as SymWhite 377?

A: SymWhite 377 is the original trade name; UATChem supplies phenylethyl resorcinol under its INCI name as cosmetic grade powder.