{"id":1961,"date":"2026-10-14T22:50:08","date_gmt":"2026-10-14T14:50:08","guid":{"rendered":"https:\/\/uredanaturals.com\/?post_type=product&p=1961"},"modified":"2026-10-14T22:50:09","modified_gmt":"2026-10-14T14:50:09","slug":"epigallocatechin","status":"publish","type":"product","link":"https:\/\/uredanaturals.com\/es\/producto\/epigallocatechin\/","title":{"rendered":"Epigallocatechin (EGC)"},"content":{"rendered":"

Ureda Naturals manufactures green tea\u2013derived Epigallocatechin (EGC)<\/strong>, CAS No. 970-74-1<\/strong>, in two standardized grades: EGC90<\/strong> and EGC98<\/strong>.<\/p>\n

Both grades are supplied as an off-white to light pink powder with caffeine controlled at \u22640.1%<\/strong>. Grade selection should be based on the target EGC dose, dosage format, caffeine limit and finished-product recovery\u2014not assay percentage alone.<\/p>\n

Specification at a Glance<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Item<\/th>\nEGC90<\/th>\nEGC98<\/th>\n<\/tr>\n<\/thead>\n
Product name<\/td>\nEpigallocatechin (EGC)<\/td>\nEpigallocatechin (EGC)<\/td>\n<\/tr>\n
Botanical source<\/td>\nGreen tea<\/td>\nGreen tea<\/td>\n<\/tr>\n
CAS No.<\/td>\n970-74-1<\/td>\n970-74-1<\/td>\n<\/tr>\n
Appearance<\/td>\nOff-white to light pink powder<\/td>\nOff-white to light pink powder<\/td>\n<\/tr>\n
EGC content<\/td>\n\u226590%<\/td>\n\u226598%<\/td>\n<\/tr>\n
Caffeine<\/td>\n\u22640.1%<\/td>\n\u22640.1%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Which Grade Should You Start With?<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Customer requirement<\/th>\nRecommended starting point<\/th>\nReason<\/th>\n<\/tr>\n<\/thead>\n
Low-dose capsule or tablet<\/td>\nEGC98<\/td>\nLower material mass for the same EGC target<\/td>\n<\/tr>\n
Formula with a wider dosage window<\/td>\nEGC90<\/td>\nMore flexibility in total addition mass<\/td>\n<\/tr>\n
Strict EGC standardization<\/td>\nEGC98<\/td>\nSmaller correction between target dose and weighed material<\/td>\n<\/tr>\n
Heated or long-hold beverage<\/td>\nCompare both grades<\/td>\nSelect by post-process recovery and appearance stability<\/td>\n<\/tr>\n
Formula containing several tea ingredients<\/td>\nEither grade<\/td>\nSelect after total caffeine mass-balance review<\/td>\n<\/tr>\n
Pilot blend with uncertain filling behavior<\/td>\nCompare both grades<\/td>\nSelect by blend uniformity and transfer recovery<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

EGC90 and EGC98 should not be treated as automatically interchangeable. A higher assay reduces the amount of material required, but it does not by itself prove better dispersion, flow, compression or stability in the finished formula.<\/p>\n

EGC90 and EGC98: Dose Correction<\/h2>\n

The grade assay changes the quantity of raw material required to deliver a defined EGC amount.<\/p>\n

Required material = Target EGC amount \u00f7 Assay fraction<\/strong><\/p>\n\n\n\n\n\n\n\n
Target EGC in finished product<\/th>\nEGC90 addition<\/th>\nEGC98 addition<\/th>\n<\/tr>\n<\/thead>\n
100 mg<\/td>\n111.1 mg<\/td>\n102.0 mg<\/td>\n<\/tr>\n
500 mg<\/td>\n555.6 mg<\/td>\n510.2 mg<\/td>\n<\/tr>\n
1 g<\/td>\n1.111 g<\/td>\n1.020 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

For low-dose products, EGC98 can reduce the material burden in a capsule, tablet or sachet. For pilot blends or formulas with a wider active-loading range, EGC90 may provide more flexibility.<\/p>\n

The calculation should be based on the agreed minimum assay during formulation locking. This prevents under-dosing when the assay is close to the grade limit.<\/p>\n

Caffeine Mass Balance<\/h2>\n

Caffeine is controlled separately from EGC content.<\/p>\n

    \n
  • For a 100 mg EGC target, EGC90 requires approximately 111.1 mg of material and may contribute up to approximately 0.111 mg caffeine at the 0.1% limit.<\/li>\n
  • For the same target, EGC98 requires approximately 102.0 mg of material and may contribute up to approximately 0.102 mg caffeine at the same limit.<\/li>\n<\/ul>\n

    When other green tea ingredients are present, their caffeine contributions must be calculated separately and then combined. The finished-product caffeine level should not be calculated from the EGC target alone.<\/p>\n

    EGC Is Not Total Tea Polyphenols<\/h2>\n

    A general green tea extract or total tea-polyphenol ingredient does not define the actual EGC input.<\/p>\n\n\n\n\n\n\n\n\n\n
    Ingredient<\/th>\nAbbreviation<\/th>\nQuality distinction<\/th>\n<\/tr>\n<\/thead>\n
    Epigallocatechin<\/td>\nEGC<\/td>\nTarget compound in this product<\/td>\n<\/tr>\n
    Epigallocatechin gallate<\/td>\nEGCG<\/td>\nDifferent gallated catechin<\/td>\n<\/tr>\n
    Epicatechin gallate<\/td>\nECG<\/td>\nDifferent gallated catechin<\/td>\n<\/tr>\n
    Epicatechin<\/td>\nEC<\/td>\nDifferent non-gallated catechin<\/td>\n<\/tr>\n
    Total tea polyphenols<\/td>\n\u2014<\/td>\nComposite value, not an EGC-specific assay<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    A formula can meet a total tea-polyphenol target while containing a different ratio of EGC, EGCG, ECG and EC. For an EGC-specific product claim or release specification, the analytical method must identify and quantify EGC separately.<\/p>\n

    How EGC Quality Affects Customer Manufacturing<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
    Manufacturing step<\/th>\nEGC-specific issue<\/th>\nObservable risk<\/th>\nVerification action<\/th>\n<\/tr>\n<\/thead>\n
    Incoming release<\/td>\nWrong grade or incorrect assay basis<\/td>\nIncorrect active calculation<\/td>\nConfirm EGC grade, assay and caffeine<\/td>\n<\/tr>\n
    Weighing<\/td>\nAddition based on nominal mass instead of assay<\/td>\nUnder-dosing<\/td>\nApply assay correction before batching<\/td>\n<\/tr>\n
    Pre-blending<\/td>\nLow-dose distribution<\/td>\nBlend non-uniformity<\/td>\nCompare samples from different blender locations<\/td>\n<\/tr>\n
    Transfer and filling<\/td>\nSegregation or equipment hold-up<\/td>\nFirst, middle and last units differ<\/td>\nTest staged filling samples<\/td>\n<\/tr>\n
    Beverage dispersion<\/td>\nMatrix-dependent physical behavior<\/td>\nHaze, sediment or incomplete dispersion<\/td>\nTest the actual formula, not water alone<\/td>\n<\/tr>\n
    Heating and holding<\/td>\nEGC recovery and catechin stability<\/td>\nAssay decrease or color change<\/td>\nCompare pre-process and post-process samples<\/td>\n<\/tr>\n
    Storage<\/td>\nAssay or appearance drift<\/td>\nFinished product moves outside target<\/td>\nTest the final package at defined time points<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Beverage and Aqueous Formulation<\/h2>\n

    EGC assay and powder appearance do not determine final beverage clarity, dispersion time or storage performance.<\/p>\n

    A meaningful trial should use the actual formulation and control EGC concentration, formula pH, water composition, ionic strength, acidulants, sweeteners, flavors, addition order, mixing energy, heating profile, holding time, dissolved oxygen and packaging headspace.<\/p>\n

    The trial should measure dispersion behavior, visible haze or sediment, color before and after processing, EGC assay before and after processing, caffeine contribution and EGC recovery after holding and storage.<\/p>\n

    A water-only test cannot reproduce the effects of the customer\u2019s acidulants, salts, flavors, oxygen exposure or thermal history.<\/p>\n

    Dry Blends, Tablets and Capsules<\/h2>\n

    For solid dosage products, the EGC assay controls active input but does not predict powder-flow behavior or finished-dose uniformity.<\/p>\n

    The customer should qualify pre-blend uniformity, main-blend distribution, transfer loss, hopper discharge, first\/middle\/last filled units, finished-product EGC content, caffeine contribution and moisture exposure during storage.<\/p>\n

    If raw-material assay passes but finished-unit results vary, the likely control point may be segregation, transfer hold-up or insufficient pre-blending rather than a failure of the EGC grade.<\/p>\n

    Heat-Process and Stability Qualification<\/h2>\n

    For heated or oxygen-exposed products, EGC should be measured across the process instead of only at incoming inspection.<\/p>\n\n\n\n\n\n\n\n\n\n\n
    Sampling point<\/th>\nPurpose<\/th>\n<\/tr>\n<\/thead>\n
    Incoming material<\/td>\nConfirm starting EGC and caffeine<\/td>\n<\/tr>\n
    Pre-process bulk<\/td>\nConfirm actual formula input<\/td>\n<\/tr>\n
    Immediately after heating<\/td>\nDetect early recovery loss<\/td>\n<\/tr>\n
    After cooling<\/td>\nIdentify precipitation or physical loss<\/td>\n<\/tr>\n
    After holding<\/td>\nMeasure process-related change<\/td>\n<\/tr>\n
    After storage<\/td>\nConfirm retained EGC level and appearance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    EGC recovery (%) = Measured EGC after processing \u00f7 Theoretical EGC input \u00d7 100<\/strong><\/p>\n

    A lower recovery should be investigated through incorrect dosing, incomplete dispersion, sedimentation, filtration loss, equipment hold-up, thermal or oxidative change and analytical recovery bias before changing the raw-material grade.<\/p>\n

    Analytical Release Requirements<\/h2>\n

    The analytical procedure should distinguish EGC from EGCG, ECG and EC. Total tea-polyphenol testing cannot replace EGC-specific quantification.<\/p>\n

    The method should establish EGC identity, separation from related catechins, matrix recovery, repeatability, reporting basis and finished-product applicability.<\/p>\n

    Quality Documents and Supply<\/h2>\n
      \n
    • Grade-specific Certificate of Analysis<\/li>\n
    • Technical Data Sheet<\/li>\n
    • Safety Data Sheet<\/li>\n
    • Product specification<\/li>\n
    • Packaging and storage information<\/li>\n<\/ul>\n
        \n
      • MOQ:<\/strong> 1 kg<\/li>\n
      • Bag options:<\/strong> 1 kg, 5 kg or 10 kg<\/li>\n
      • Fibre drum options:<\/strong> 5 kg, 10 kg or 25 kg<\/li>\n
      • Storage:<\/strong> Sealed in a cool, dry environment<\/li>\n<\/ul>\n

        \u00a0FAQ<\/h2>\n
        \nWhat analytical specificity is needed to prevent EGCG, ECG or EC from inflating an EGC result?<\/summary>\n
        \n

        The release method must identify and quantify EGC while resolving it from EGCG, ECG and EC. Total tea polyphenols or a non-selective colorimetric result cannot establish EGC content.<\/p>\n

        The method should demonstrate peak identity, separation from related catechins, matrix recovery, repeatability and a defined reporting basis.<\/p>\n<\/div>\n<\/details>\n

        \nWhat evidence is required before EGC90 and EGC98 can be treated as process-equivalent?<\/summary>\n
        \n

        Assay equivalence alone is insufficient. Both grades should be tested in the same formula and process, comparing EGC recovery, caffeine contribution, blend uniformity, color, turbidity, heat-hold performance, finished-product assay and storage trend.<\/p>\n

        The grades should only be treated as interchangeable when the finished-product results meet the same predefined acceptance criteria.<\/p>\n<\/div>\n<\/details>\n

        \nHow should the caffeine limit be propagated through a formula containing multiple green tea ingredients?<\/summary>\n
        \n

        Caffeine must be calculated as a separate mass-balance component:<\/p>\n

        Maximum caffeine contribution = Ingredient addition \u00d7 Caffeine limit<\/strong><\/p>\n

        The caffeine contribution from EGC must be added to the caffeine contribution of every other tea-derived ingredient. Calculating caffeine only from the EGC target can underestimate the total caffeine level of the finished product.<\/p>\n<\/div>\n<\/details>\n

        \nHow can a developer distinguish EGC degradation from analytical recovery bias in a finished beverage?<\/summary>\n
        \n

        A lower post-process result does not automatically prove chemical degradation. Compare the incoming material, pre-process bulk, post-process bulk, sediment or filter residue and a matrix-spiked recovery sample using the same validated chromatographic method.<\/p>\n

        This separates chemical degradation, physical process loss and analytical interference before changing the raw-material grade or manufacturing process.<\/p>\n<\/div>\n<\/details>\n

        \nWhat changes require requalification of the selected EGC grade?<\/summary>\n
        \n

        Requalification should be considered when the selected grade, target EGC dose, formula pH, acidulant system, heating profile, mixing equipment, filtration step, packaging or analytical method changes.<\/p>\n

        These changes can alter EGC recovery, color, caffeine contribution, finished-product uniformity or stability even when the incoming raw material still meets its original specification.<\/p>\n<\/div>\n<\/details>","protected":false},"excerpt":{"rendered":"

        Ureda Naturals manufactures green tea\u2013derived Epigallocatechin (EGC), CAS No. 970-74-1, in EGC90 and EGC98 grades with caffeine controlled at \u22640.1%.<\/p>","protected":false},"featured_media":1962,"template":"","meta":[],"product_brand":[],"product_cat":[24],"product_tag":[195,196,197,194,191],"class_list":["post-1961","product","type-product","status-publish","has-post-thumbnail","product_cat-matcha-tea-ingredients","product_tag-egc","product_tag-egc90","product_tag-egc98","product_tag-epigallocatechin","product_tag-green-tea-catechin","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"\nEpigallocatechin (EGC) Manufacturer | Ureda Naturals<\/title>\n<meta name=\"description\" content=\"Ureda Naturals manufactures green tea\u2013derived Epigallocatechin (EGC), CAS 970-74-1, in EGC90 and EGC98 grades with caffeine \u22640.1%.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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