Ingredient fundamentals
Green tea extract is a multi-component Camellia sinensis leaf material, not isolated EGCG. Its plant part, extraction route, marker profile, caffeine level and supplied form should be confirmed before formulation testing. That distinction matters because a grade with a high total-polyphenol number may still differ in EGCG, total catechins, caffeine, color, solubility and carrier content. The extract should be selected as a complete botanical profile rather than by one percentage alone.
Composition & botanical origin
Green tea extract contains several measurable constituents, so total polyphenols, total catechins, EGCG and caffeine are separate specification questions. The plant source and extraction process should stay connected to the quoted grade.
01 / BOTANICAL PROFILE
The extract contains multiple constituents, so total polyphenols, total catechins and EGCG are not interchangeable measurements. Plant part, origin, solvent, extract ratio, solids and carrier should be recorded with the quoted grade.
Caffeine also needs a measured limit. “Decaffeinated” or low-caffeine language should not be treated as zero unless a lot-specific result supports it.
02 / FORMULATION CHECK
Run samples at a matched marker basis and record total polyphenols, catechins, EGCG, caffeine, solids and carrier. A matching headline percentage does not guarantee matching composition.
Compare clarity, sedimentation, color, odor and pH/oxygen sensitivity in the same base before selecting a grade for scale-up.
Technical identity
Reference values are not a batch release document. Request the current specification and COA for the offered material.
| Ingredient identity | Camellia sinensis leaf extract; a multi-component botanical material, not isolated EGCG. |
|---|---|
| INCI / naming review | Camellia Sinensis Leaf Extract is a common INCI reference. Confirm the plant part, supplied form, local name and destination-market listing for the actual material. |
| CAS references | Extract: 84650-60-2. EGCG marker: 989-51-5. |
| Formula & molecular weight | No single value for the extract. EGCG marker only: C22H18O11; 458.37 g/mol. |
| Assay / standardization | Agree total polyphenols, total catechins or EGCG as separate targets with methods and reporting basis. Do not equate an extract ratio such as 10:1 with active-marker content. |
| Caffeine | Request lot-specific measured caffeine content. Low-caffeine and decaffeinated grades may be available; confirm the offered grade and limit in the quotation. |
| Plant part & production | Confirm Camellia sinensis identity, leaf origin, extraction solvent, extract ratio, carrier, solids content, concentration, purification and drying route. |
| Appearance & sensory range | Off-white to light brown or greenish-brown powder depending on grade. Establish an approved color and odor range because botanical lots can vary. |
| Solubility | Soluble to dispersible in water or ethanol–water depending on grade. High-catechin grades may be hygroscopic; test clarity and sedimentation at the intended concentration. |
| Contaminant review | Request pesticide residues, heavy metals, microbial limits, residual solvents and preservative status according to the actual grade and destination market. |
| Stability | Catechins are sensitive to heat, moisture, alkaline pH, light and oxygen. Select processing conditions and packaging through finished-base testing. |
| Storage | Store cool and dry, tightly closed and protected from light. Confirm shelf life and handling on the supplied specification. |
Preliminary technical values are provided for project discussion. Confirm every value against the current specification and lot-specific COA for the offered material.
Formulation concepts
These are starting concepts, not finished formulas. Set the active level, phase, process, preservation and packaging from the current specification, safety assessment and stability work.
01 / SERUM
Compare marker profile, caffeine, color, odor, clarity and sedimentation in the intended base. Avoid assuming that a high-marker powder will automatically make a clear serum.
02 / SCALP
Review surfactant, preservative, pH, color and packaging compatibility for the selected grade. Confirm whether the desired sensory profile can be maintained across the lot.
03 / MASK
Control heat and oxygen exposure while monitoring botanical color, odor and marker retention. Confirm dispersion and rinse behavior in the complete formula.
Quality & documentation
Document availability, scope and lot applicability must be confirmed for each quotation.
Plant species, leaf part, origin, extraction solvent, extract ratio, carrier, solids and supplied-form statement.
COA with polyphenol, catechin, EGCG and caffeine results, limits, methods and assay basis.
Pesticide residues, heavy metals, microbial limits, residual solvents and preservative status.
Color and odor range, storage, shelf life, moisture sensitivity and stability data relevant to the intended base.
For supplier qualification, request certificates showing the holder, scope and validity dates. Certification or regulatory status must be confirmed for the offered material and supply entity.
Research context
Database records and publications provide technical context. They are not tests of the offered batch or proof of finished-cosmetic performance.
Use this PubMed search to review Camellia sinensis cosmetic studies; confirm extract type, markers and test conditions before drawing conclusions.
Open research sourceSang et al. (2005) examines auto-oxidation and epimerization. Review the experimental conditions when planning pH, oxygen and temperature screens.
Open research sourceHe et al. (2009) compares HPLC and spectrophotometric catechin measurements. The analytical method and calibration basis matter when comparing quotations.
Open research sourceSource & evidence route
Public databases and literature provide context only. They do not replace Cosveta’s specification, TDS, SDS or lot-specific COA.
Review Camellia sinensis identity, INCI and EU function as a starting point; confirm CAS and local name from Cosveta’s SKU file.
Open sourceCompare plant part, extract solvent, markers and test conditions before applying literature to a cosmetic formula.
Open sourceUse the cited DOI records to review EGCG stability and assay comparability; they are not supplier specifications.
Open sourceCommercial supplier links have been removed. Verify every current product value against Cosveta’s supplied specification and lot-specific COA.
Buyer questions
No. The extract contains multiple constituents. EGCG is a marker with its own CAS number and assay value.
There is no single universal cosmetic grade. Specify your target composition and ask for available grades, analytical methods and a formulation sample.
Do not assume zero. Agree a measurable limit and review the actual lot result.
Solubility and dispersibility depend on the grade and base. Confirm clarity, color and sedimentation at the intended concentration and through stability testing.
Sample & supply review
Request a sample, compare a batch or qualify a supply option. Include your country, formulation, required documents and order volume.
MOQ, packaging, sample availability, lead time and document scope are confirmed in the quotation.
Selected ingredientGreen Tea Extract for Skincare and Scalp-Care Formulations