Product Description
Phenylethyl Resorcinol powder is a synthetic skin‑brightening and anti‑melasma agent designed to effectively inhibit tyrosinase activity and reduce visible hyperpigmentation, dark spots, and uneven skin tone. By combining a resorcinol core with a phenylethyl group, this ingredient offers enhanced stability and high melanin‑targeting selectivity compared to traditional brightening agents.
Phenylethyl Resorcinol powder is widely known as SymWhite® 377, originally developed by Symrise. Our Phenylethyl Resorcinol powder is produced using advanced organic synthesis and recrystallization technology, ensuring high purity (≥99% by HPLC), consistent batch‑to‑batch performance, and excellent compatibility with premium anti‑aging and brightening cosmetic formulations.
Phenylethyl Resorcinol – Three Key Features
High tyrosinase inhibition efficiency
Works at much lower concentrations than arbutin or kojic acid. A small addition already visibly reduces melanin production, with good blocking effects on both mushroom and human tyrosinase in tests.
Good formulation stability
Doesn't discolor easily like kojic acid or some vitamin C derivatives. Within pH 4–6, storing at 50°C for one month shows little change in content and color – much easier for production.
Skin penetration advantage due to lipophilicity
The phenylethyl group helps it get into the epidermal layer without relying heavily on penetration enhancers. At normal use levels (0.1%–0.5%), most skin types tolerate it well, but for compromised skin barriers, pairing with soothing ingredients is recommended.
Phenylethyl Resorcinol Powder Characteristics
Purity: ≥99% (HPLC), fully synthetic, no heavy metal catalyst residues
Appearance: White to off-white crystalline powder – occasional very light beige is normal
Solubility: Poor in water; soluble in glycols (e.g., butylene glycol, propylene glycol) and ethanol. Pre‑dissolve in alcohol or glycol before adding to formulas
pH Stability: Stable in pH 4.0–6.5. Degrades under alkaline conditions – avoid direct mixing with high‑pH ingredients
Thermal Stability: Decent stability under normal processing temperatures (below 70°C). Prolonged high heat may cause slight yellowing
Storage: Keep sealed, away from light and moisture. Store at cool room temperature (15–25°C). Once opened, use promptly
COA (Certificate of Analysis)
|
Parameter |
Specification |
Test Method |
|
Appearance |
White to off-white crystalline powder |
Visual |
|
Purity |
≥99% |
HPLC |
|
Identity |
Conforms |
MS |
|
Moisture |
≤0.5% |
Karl Fischer |
|
Heavy Metals |
≤10 mg/kg |
ICP-MS |
|
Total Plate Count |
≤1000 CFU/g |
GB 4789.2 |
Phenylethyl Resorcinol Production Process
Product Benefits
Targets dark spots directly
Inhibits tyrosinase activity more efficiently than kojic acid or arbutin at lower concentrations.
01
Fades hyperpigmentation evenly
Reduces melasma, sun spots, and post‑acne marks without a grayish cast.
02
Stays stable in formulas
No rapid discoloration or degradation under normal pH (4–6) and moderate heat.
03
Penetrates without heavy solvents
The phenylethyl group improves skin entry, so you don't need excess penetration enhancers.
04
Plays well with others
Works smoothly with niacinamide, vitamin C derivatives, and retinoids for layered brightening effects.
05
Applications
Brightening serums and emulsions – Works well in leave‑on products targeting dark spots, dullness, and uneven skin tone. Typical use level 0.1%–0.5%.
Anti‑aging creams – Often paired with peptides or retinoids to address age spots and overall luminance, not just wrinkles.
Spot‑correcting stick or gel formulas – Because of its direct tyrosinase inhibition, it's a good fit for localised hyperpigmentation treatments (melasma, post‑acne marks).
Daytime brightening lotions – Stable enough to be used in lighter, oil‑in‑water emulsions, provided the formula pH stays between 4 and 6.
Other Customizable Products (OEM / ODM)
We deliver end-to-end ODM/OEM solutions for plant extracts, transforming your concepts into market-ready products through integrated expertise and in-house production.
① Cooperation Models
OEM: Faithfully reproduce your formula with guaranteed integrity and batch-to-batch consistency.
ODM: From concept to launch, we provide complete solutions including formulation, development, and compliant manufacturing.
② Key Process
Analysis & Design: Customized solutions based on your requirements
Prototyping: Sample development using advanced extraction technologies
Production: Certified manufacturing with rigorous quality control
Why Choose Our Phenylethyl Resorcinol ?
Top quality
Using high quality material and establishing a strict quality control system,assigning specific persons in charge of each part of production,from raw material purchase to assembly.
01
Professional R&D center
Employed researchers with 15 years working experience in plant extraction industry.Each month will release a new series of products.
02
Fast dispatch
Most of the products are in stock. Quality below 100kgs can be delivered within 5-7 days.
03
Price advantage
Low MOQ with competitive price.
04
Online service
Professional team 7x24hours customer service. 6 OEM/ODM Service: GMP factory OEM and ODM generation processing are warmly welcomed.
05
FAQ
Q: This powder doesn't dissolve in water. Did I get a fake product?
A: No, it's not fake. It's naturally barely soluble in water. Most formulators pre‑dissolve it in butylene glycol, propylene glycol, or ethanol before adding to the water phase. Sprinkling it directly into water will leave it floating or crystallizing out.
Q: My serum turned darker after two weeks. What went wrong?
A: Most likely the pH was too high or the storage temperature was too warm. Phenylethyl Resorcinol slowly yellows under alkaline conditions (e.g., pH >7) or prolonged heat above 50°C. Keep the formula pH between 4.0–6.5 and store away from direct sunlight.
Q: How much should I add to a cream to get results without causing irritation?
A: Most successful formulas use 0.1%–0.5% (final product). Around 0.3% already shows visible spot‑fading effects. Below 0.1% is usually too weak, and above 0.5% may be risky for sensitive skin. Always run a patch test for new formulas.
Q: Can I use it with niacinamide or vitamin C?
A:
Yes, and they often work even better together. Niacinamide pairs very well – one blocks melanin signals, the other inhibits tyrosinase. Vitamin C derivatives are also fine, but avoid storing high‑concentration L‑ascorbic acid with it in a very low‑pH formula for long periods. They don't react badly, but each degrades faster. Best to do a small stability test first.
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