ZLEY® BRC-WS (CAS 1135-24-6, 128446-35-5, 504-63-2, 7732-18-5, 7631-90-5):
Brightening · Anti-Inflammatory · Spot Correction – A Next-Generation Brightening Agent for Sensitive Skin
Product Overview
ZLEY® BRC-WS, also known as 577 Supramolecular Vesicles, features advanced supramolecular vesicle technology for sustained release, using hydroxypropyl-β-cyclodextrin (HPBCD) to encapsulate 4-Butylresorcinol (also known as 577 or Rucinol). This proprietary technology solves the water solubility challenge of 4-Butylresorcinol, enhances its stability, improves skin penetration, and increases its mildness. The result is a water-soluble, transparent, stable, long-acting, gentle brightening product with excellent safety and efficacy.
ZLEY® is a professional supplier of BRC-WS, providing stable quality, technical support, and global delivery services covering over 60 countries.
ZLEY® BRC-WS Product Information
| Parameter | Specification |
| INCI Name | 4-Butylresorcinol, Hydroxypropyl Cyclodextrin, 1,3-Propanediol, Water, Sodium Bisulfite |
| CAS Numbers | 1135-24-6, 128446-35-5, 504-63-2, 7732-18-5, 7631-90-5 |
| Appearance | Colorless to pale yellow transparent liquid |
| Recommended Usage | 1 – 8% |
| Solubility | Soluble in water at room temperature |
| Recommended pH Range | Stable within pH 4 – 8 |
| Processing | Add directly to the formulation at room temperature and mix thoroughly |
| Key Benefits | Brightening, antioxidant, post-acne mark fading |
| Storage Note | 4-Butylresorcinol is a phenolic compound that may change color upon exposure to air and sunlight. Protect raw materials and finished products with light-protective packaging. |
Is ZLEY® BRC-WS Safe?
Yes. ZLEY® BRC-WS is considered safe under normal, reasonable, and foreseeable conditions of use at the following recommended maximum concentrations:
| Product Type | Maximum Safe Concentration |
| Facial toners/lotions | 5.2% |
| Body creams/lotions | 2.0% |
| Other leave-on products | 8.0% |
| Rinse-off products | 0.4% |
Product Applications
In cosmetics and skincare, ZLEY® BRC-WS functions as a skin conditioning agent primarily used in brightening and spot-correction products.
Why Source ZLEY® BRC-WS from ZLEY®?
Through over 20 years of dedicated effort and pursuit of excellence, ZLEY® has evolved into a modern enterprise integrating research, production, quality control, and sales. We are committed to providing the highest quality personal care raw materials, semi-finished products, and customized formulation solutions. We strive to meet the diverse needs of our customers and ensure the delivery of superior products and service.
What Technical Support Can You Expect When Sourcing ZLEY® BRC-WS?
As a specialized supplier, ZLEY® offers value that extends beyond the product itself:
- Formulation Application Support: Basic formulation suggestions, combination recommendations, and processing guidance
- Regulatory Consulting Services: Assistance with interpreting regulatory requirements for target markets
- Quality and Supply Assurance: Consistent product quality, competitive pricing, and reliable global logistics delivery
- Market Trend Information: Latest market dynamics and ingredient application trends
ZLEY® BRC-WS – Frequently Asked Questions (FAQ)
Q1: What is 4-Butylresorcinol (577) and why is it special?
A: 4-Butylresorcinol (577) is a powerful tyrosinase inhibitor. It is 2.5 times more effective than Kojic Acid and 22 times more effective than Arbutin. However, free 4-Butylresorcinol has poor solubility, low stability, and potential irritation – issues that are effectively solved by ZLEY® BRC-WS encapsulation technology.
Q2: How does ZLEY® BRC-WS solve solubility and stability problems?
A: It uses hydroxypropyl-β-cyclodextrin (HPBCD) to form supramolecular vesicles that encapsulate 4-Butylresorcinol. This makes the complex fully water‑soluble, protects it against oxidation and light, and results in a transparent, stable, and gentle brightening ingredient.
Q3: Are there special storage requirements?
A: Yes. Due to its phenolic nature, store both the raw material and finished products in light‑protective (opaque or amber) containers, in a cool, dry place. Proper storage ensures excellent stability.
Q4: How to request samples, technical documentation, and pricing?
A: Contact our export team at [email protected]. Please include your company details, intended application, and target market so we can provide relevant support.