Description
Product Introduction
Phenylethyl Resorcinol, well-known as SymWhite 377, is a high-efficiency targeted whitening active cosmetic raw material optimized from natural pine-derived polyphenol structure. It serves as a potent tyrosinase inhibitor, with significantly stronger melanin suppression efficiency than kojic acid and arbutin.
Owing to its lipophilic characteristic, it can penetrate the skin lipid barrier smoothly and act on melanocytes inside the epidermis stably. It features high whitening efficiency, mild irritation and excellent formula compounding compatibility, which has become a mainstream premium brightening active ingredient favored by global high-end skincare manufacturers for pigment correction.
Core Efficacy & Functions
- Strongly Inhibit Tyrosinase & Inhibit Melanin Generation: Block the catalytic activity of tyrosinase fundamentally, cut off the whole melanin synthesis pathway, effectively fade sun spots, acne post-inflammatory pigmentation, chloasma and uneven dull skin tone. Its tyrosinase inhibitory activity is far higher than kojic acid and alpha-arbutin.
- Powerful Antioxidation & Anti-photoaging: Scavenge excess free radicals induced by UV rays, blue light and environmental pollution; relieve light-induced skin inflammation, prevent UV-triggered pigment deposition in advance.
- Anti-inflammatory & Calming Effect: Alleviate mild inflammatory redness of sensitive skin, reduce pigmentation caused by inflammatory stimulation; gentle for most normal and sensitive skins within standard dosage.
- Improve Overall Skin Uniformity: Gradually brighten sallow, dull complexion, realize transparent and even skin tone from inside out.
Main Application Fields
- Brightening & spot-fading skincare: Whitening serums, spot correction essences, brightening facial creams, lightening facial masks
- Sun care products: Sunscreen cream, after-sun repair lotion, prevent UV-induced darkening
- Repair skincare: Acne repair lotion, improve acne marks and post-inflammation pigmentation
- Custom OEM high-end functional cosmetic formulas
Formulation Operation Guidance
- Pre-dissolve this ingredient in polar oil or polyol first at 40~50℃ low temperature, then add into oil phase before emulsification;
- Avoid high-temperature heating above 60℃ and long-term sunlight exposure during production to prevent oxidation discoloration;
- Compatible with niacinamide, Ectoin, Vitamin C ethyl ether, tranexamic acid, hyaluronic acid and other classic actives for synergistic whitening effect;
- Do not exceed the regulatory limit dosage of 0.5% to guarantee mildness.
Quality & Compliance
Manufactured under GMP, with COA, MSDS and heavy metal test reports available upon request. MOQ and lead time on inquiry.

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