What is Phenylethyl Resorcinol CAS 85-27-8?

Phenylethyl Resorcinol is a synthetic resorcinol derivative with the formula C14H14O2, INCI name Phenylethyl Resorcinol, and CAS 85-27-8. It is supplied as a white to off-white crystalline powder and is used mainly as a skin-brightening and antioxidant cosmetic active.

Why is Phenylethyl Resorcinol also called 377 or SymWhite 377?

The name 377 comes from the commercial ingredient SymWhite 377. Phenylethyl Resorcinol is the INCI name, while 377 is a widely used trade alias; both refer to the same active CAS 85-27-8.

How does Phenylethyl Resorcinol work in skin-brightening products?

It inhibits tyrosinase and helps reduce melanin formation, which supports brightening and treatment of uneven skin tone. The resorcinol structure can interact with tyrosinase while also providing phenolic antioxidant activity.

What is the typical use level for Phenylethyl Resorcinol in cosmetics?

Cosmetic formulations commonly use it in the range of about 0.1% to 1.0%, with 0.5% frequently cited in clinical or technical references. The final level should be selected through formulation testing and regulatory review.

How should Phenylethyl Resorcinol be incorporated into a formulation?

Because it is essentially insoluble in water, it is normally dissolved in the oil phase or a suitable solvent before emulsification. Gentle heating of the oil phase, followed by confirmation that the powder is fully dissolved, helps avoid undissolved crystals.

What stability precautions are important for Phenylethyl Resorcinol?

The active is sensitive to light and oxidative conditions, so opaque packaging, cool dry storage, and antioxidants in the oil phase are recommended. Exposure to UV or visible light can cause degradation and reddish discoloration.

Phenylethyl Resorcinol CAS 85-27-8

Phenylethyl Resorcinol is a functional aromatic compound commonly used as a cosmetic formulation ingredient. It is typically incorporated into skin care formulations such as creams, serums, and emulsions where controlled functional performance is required. Standard supply is available with supporting documentation such as COA, TDS, and SDS. Ascorbyl Glucoside is a related cosmetic active to compare where a water-soluble vitamin C derivative is required in skin-care formulations.

CAS: 85-27-8
Synonyms: Phenylethyl Resorcinol; 4-(1-Phenylethyl)resorcinol; 4-(1-Phenylethyl)-1,3-benzenediol; 4-(alpha-Methylbenzyl)resorcinol; SymWhite 377
Einecs: 480-070-0
Molecular Formula: C14H14O2
Grade: Cosmetic Grade / Industrial Supply Grade
Package: Standard export packaging; customized packaging available upon inquiry

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Product Description

1 Quick Product Identity

2 Physicochemical Properties

3 Typical Applications

4 Packaging

5 Storage

Quick Product Identity

Category: Cosmetic Raw Material
Function: Functional Additive
Application: Skin Care Formulations
Supply Form: Powder / Solid

Physicochemical Properties

Property	Description
Appearance	White to off-white crystalline powder
Solubility	Slightly soluble in water, soluble in organic solvents
Odor	Mild characteristic odor
Stability	Stable under normal handling conditions

Typical Applications

Typically used in:

Skin care formulations such as creams and lotions
Emulsion-based cosmetic systems
Serum and essence formulations
Functional cosmetic ingredient blends

For adjacent resorcinol-family ingredient pages, compare 4-Butylresorcinol and Resorcinol.

Packaging

Packed in sealed, moisture-resistant containers suitable for long-distance transport and industrial storage.

Storage

Store in a cool, dry, and well-ventilated area. Keep container tightly closed and protect from direct light and moisture exposure.

FAQ - Technical & Supply Chain

Q:
What is Phenylethyl Resorcinol CAS 85-27-8?

A: Phenylethyl Resorcinol is a synthetic resorcinol derivative with the formula C14H14O2, INCI name Phenylethyl Resorcinol, and CAS 85-27-8. It is supplied as a white to off-white crystalline powder and is used mainly as a skin-brightening and antioxidant cosmetic active.
Q:
Why is Phenylethyl Resorcinol also called 377 or SymWhite 377?

A: The name 377 comes from the commercial ingredient SymWhite 377. Phenylethyl Resorcinol is the INCI name, while 377 is a widely used trade alias; both refer to the same active CAS 85-27-8.
Q:
How does Phenylethyl Resorcinol work in skin-brightening products?

A: It inhibits tyrosinase and helps reduce melanin formation, which supports brightening and treatment of uneven skin tone. The resorcinol structure can interact with tyrosinase while also providing phenolic antioxidant activity.
Q:
What is the typical use level for Phenylethyl Resorcinol in cosmetics?

A: Cosmetic formulations commonly use it in the range of about 0.1% to 1.0%, with 0.5% frequently cited in clinical or technical references. The final level should be selected through formulation testing and regulatory review.
Q:
How should Phenylethyl Resorcinol be incorporated into a formulation?

A: Because it is essentially insoluble in water, it is normally dissolved in the oil phase or a suitable solvent before emulsification. Gentle heating of the oil phase, followed by confirmation that the powder is fully dissolved, helps avoid undissolved crystals.
Q:
What stability precautions are important for Phenylethyl Resorcinol?

A: The active is sensitive to light and oxidative conditions, so opaque packaging, cool dry storage, and antioxidants in the oil phase are recommended. Exposure to UV or visible light can cause degradation and reddish discoloration.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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