EGCG 98% HPLC epigallocatechin gallate powder ingredient

EGCG (Epigallocatechin Gallate) 98%

EGCG is a purified tea catechin derived from the leaves of Camellia sinensis. Also known as (-)-epigallocatechin gallate or epigallocatechin-3-gallate, it is a polyphenolic gallate ester naturally present in green tea and commercially supplied as a concentrated phytochemical powder for nutritional, functional food, and formulation applications.

Essencefield supplies EGCG 98% standardized to ≥98% epigallocatechin gallate by HPLC. The compound-specific assay distinguishes this material from conventional green tea extracts standardized to total polyphenols or total catechins, providing a more controlled ingredient for formulations where defined catechin input and chromatographic purity are important sourcing criteria.

SKU: BOT-PHY-0007 Categories: Phytochemicals, Flavonoids Tags: Catechins, EGCG (Epigallocatechin Gallate), Epigallocatechin Gallate, Flavan-3-ols, Flavonoids

Ingredient Profile & Common Uses

Derived from Camellia sinensis leaf, this ingredient belongs to the gallated catechin family. Its chemical structure differentiates it from epigallocatechin (EGC), epicatechin (EC), and epicatechin gallate (ECG). The purified material is therefore commercially distinct from whole green tea powder and broad-spectrum extracts containing multiple catechins, caffeine, and other naturally occurring tea constituents.

The defining commercial attribute is the compound-level assay. A ≥98% grade enables procurement and formulation teams to calculate the target catechin directly instead of deriving its contribution from a total-polyphenol or total-catechin specification. This makes the purified grade particularly relevant when ingredient identity, assay consistency, and controlled inclusion levels are more important than the broader phytochemical profile of green tea.

The material is used in concentrated nutritional products, dry premixes, functional formulations, and selected topical systems. Dry applications benefit from the controlled assay and relatively low inclusion level, while aqueous formulations require closer attention to dissolution, pH, oxygen exposure, processing temperature, and hold time because solution conditions can materially affect stability.

Application Areas

Capsules & Tablets

A defined catechin assay supports accurate inclusion calculations in capsules and tablets where formulators require a purified active input rather than a broader green tea extract standardized to total polyphenols.

Powdered Supplements & Premixes

The concentrated powder can be incorporated into sachets, drink powders, and premixes. Premixing and blend-uniformity evaluation are useful when the ingredient represents a relatively small proportion of the final dry blend.

Functional Beverage Systems

Beverage and powdered drink development should consider dissolution sequence, solution pH, dissolved oxygen, thermal exposure, processing time, and finished-product stability before establishing the final formulation process.

Topical Formulations

The purified catechin is also evaluated in serums, gels, emulsions, and related topical systems where pH, oxidation, light exposure, solubilization, color development, and compatibility require formulation assessment.

Typical Specifications

Parameter	Specification / Reference
Product Name	EGCG 98%
Compound Name	(-)-Epigallocatechin Gallate
Alternative Name	Epigallocatechin-3-gallate
Abbreviation	EGCG
Botanical Source	Camellia sinensis
Source Material	Green Tea Leaf
Ingredient Type	Purified Tea Catechin / Phytochemical
Product Form	Powder
Primary Specification	≥98% EGCG
Analytical Method	HPLC
CAS Number	989-51-5
PubChem CID	65064
Molecular Formula	C₂₂H₁₈O₁₁
Molecular Weight	458.37 g/mol
Chemical Class	Polyphenolic Catechin / Gallate Ester
Reference Water Solubility	≥5 mg/mL in water
Relevant Epimer	Gallocatechin Gallate (GCG)

Compound Identity & Purity

Epigallocatechin gallate has the molecular formula C₂₂H₁₈O₁₁, a molecular weight of 458.37 g/mol, and CAS number 989-51-5. Structurally, it is a gallate ester of epigallocatechin and belongs to the polyphenolic catechin family. These compound-level identifiers distinguish the purified phytochemical from multi-component green tea extracts described primarily by total polyphenol or total catechin content.

Chromatographic analysis is important because the target compound occurs alongside structurally related catechins. High-purity material should show clear separation of the principal peak from related components, particularly gallocatechin gallate (GCG).

GCG is analytically relevant because elevated temperature and increasing pH can promote epimerization from EGCG to GCG. This relationship makes chromatographic profile interpretation useful when comparing high-assay materials or evaluating the effects of processing conditions on ingredient integrity.

Technical & Quality Considerations

Quality evaluation should focus on correct compound identity, assay, chromatographic purity, and separation from structurally related catechins. For a purified ingredient, these parameters provide more meaningful analytical information than a general total-polyphenol measurement. Procurement teams comparing materials should therefore distinguish compound-specific assay data from specifications intended for conventional green tea extracts.

The compound is water-soluble at low mg/mL concentrations; reference material has demonstrated clear aqueous solutions at ≥5 mg/mL. Dissolution, however, should not be interpreted as solution stability. Research on aqueous systems shows decreasing stability as pH and temperature increase, with epimerization also accelerating under these conditions. Oxygen exposure, light, processing temperature, and time in solution are therefore relevant development variables.

During scale-up, dry formulations should be evaluated for premixing and blend uniformity, particularly at low inclusion levels. Liquid systems require assessment of dissolution sequence, pH, dissolved oxygen, thermal processing, hold time, and packaging conditions. For EU foods containing green tea extracts with EGCG, Regulation (EU) 2022/2340 requires the daily portion to contain less than 800 mg of (-)-epigallocatechin-3-gallate and establishes corresponding labeling requirements.

Packaging & Commercial Supply

Essencefield supports product evaluation, formulation trials, commercial orders, and ongoing ingredient supply. Packaging, storage, and shipping arrangements are determined by product characteristics, order quantity, stability requirements, and destination-market needs.

Supply Item	General Information
Sample	Available upon request for formulation, testing, and supplier evaluation
Order Quantities	100 g · 1 kg · 5 kg · 25 kg · 100 kg · 500 kg · Bulk
Sample Lead Time	Typically 5–7 days after sample confirmation
Production Lead Time	Typically 15–30 days after order and specification confirmation
Packaging	Suitable protective inner packaging with bags, cartons, drums, or other appropriate outer packaging
Storage	Store in tightly sealed, suitable protective packaging in a cool, dry environment. Protect from moisture, heat, and direct sunlight. Specific storage conditions follow the approved product specification.
Documentation	COA · Product Specification · TDS · SDS · Applicable declarations (as applicable)

Final order quantities, lead times, packaging, documentation, and shipping arrangements are confirmed according to the selected product and commercial requirements.