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| Quantity: | |
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98% EGCG
Nanjing Gemsen
CAS 989-51-5
Introduction：
Product Name | EGCG (Green Tea Extract) |
Synonyms | EGCG, (-)-Epigallocatechin gallate |
Appearance | Off-white or pale pink powder |
CAS | 989-51-5 |
Molecular formula | C22H18O11 |
Molecular Weight | 458.37 |
Purity | 45%, 50%, 90%, 98%EGCG |
Sample | Available |
CAS 989-51-5 designates (–)-Epigallocatechin gallate (EGCG) as an isolated chemical entity, not a mixture. The material appears as a white to off‑white crystalline powder. Moderate solubility in water and ethanol. Solubility increases at slightly alkaline pH, but stability drops rapidly under such conditions. No other catechins or caffeine present. Each batch is tested for single‑peak purity and residual solvents. In cosmetic applications, this grade serves as a well‑defined active ingredient for anti‑aging serums, brightening formulas, and protective topicals. High purity ensures consistent performance and simplifies regulatory documentation for finished products.
Specification:
Application:
1. Analytical reference standard
– Laboratories need known pure compounds to quantify catechins in food, supplement, or botanical samples.
– Used as a calibration standard in HPLC or UPLC methods.
Requires certificate of assay and chromatographic purity.
2. Research on isolated mechanisms
– Studying a single catechin avoids interference from other tea components (e.g., caffeine, EC, ECG).
– Applied in cell‑based or enzyme‑activity assays where only EGCG effects are of interest.
Not for human consumption as a supplement.
3. High‑end topical formulations
– Some anti‑aging serums and creams target a well‑characterized active molecule.
– Incorporated at low concentrations (0.1–1%) into oil‑in‑water emulsions or alcohol‑based toners.
Provides a clear ingredient declaration.
4. Specialty small‑dosage capsules
– Low‑volume, high‑potency capsules sometimes use pure EGCG.
– Each capsule contains 50–100 mg of EGCG monomer. Recommended to take with food.
Used in product lines where cost is secondary to purity claims.
Q&A
Q1: Why choose CAS 989-51-5 instead of a green tea extract (CAS 84650-60-2)?
For absolute purity and a single‑component identity. No other catechins, no caffeine. Ideal for reference standards or formulations needing only EGCG.
Q2: Is this product suitable for ready‑to‑drink beverages?
Limited. Solubility in neutral water is low (≈1‑2 mg/mL). Higher concentrations cause precipitation. Alcoholic or pH‑adjusted systems may work, but cloudy appearance often remains.
Q3: Any safety limits for handling?
Standard laboratory precautions apply. Use fume hood when weighing powder. Avoid inhalation and prolonged skin contact.
Q4: Is EGCG monomer more effective than green tea extract in skincare?
Not necessarily. While pure EGCG shows strong antioxidant activity in cell studies, the mixture of catechins in green tea extract (CAS 84650-60-2) may provide broader protection through synergy. The choice depends on formulation goals, stability requirements, and budget.
