Description
STANDARDISED BOTANICAL ACTIVE
Fisetin — 98.0%
Fisetin is listed as an isolated flavonol at 98.0% by HPLC using an external reference standard. When comparing offers, confirm the named standard, calculation basis and current batch result; an area-normalisation percentage is a different reporting basis.
COA-Backed Specification
| Identity | Fisetin (3,3′,4′,7-tetrahydroxyflavone) |
|---|---|
| Material type | Plant-derived flavonol, isolated and purified |
| Form and colour | Fine yellow crystalline powder |
| Assay | 98.0% |
| Method | HPLC (external standard) |
| Quantitation basis | External reference standard, not area normalisation |
| Related flavonoids | Reported per batch against the agreed specification |
| Particle size | 98% through 80 mesh |
| Loss on drying | Within the limits of the approved specification |
| Ash | Within the limits of the approved specification |
| Heavy metals | Within the limits of the approved specification |
| Microbiological limits | Within the limits of the approved specification |
| Shelf life | Two years when stored properly |
Limits shown are the agreed specification. Result values are issued on the batch-specific certificate of analysis.
Buyer Decision Guide
Fisetin is one of the grades where two suppliers can both claim 98% and still ship different material. Three points decide whether the lots are equivalent: the quantitation basis, the identity confirmation, and the related-flavonoid ceiling.
- Assay: 98.0% by HPLC calibrated against an external reference standard.
- Quantitation basis stated on the COA, so results are comparable across suppliers.
- Identity confirmed by retention time against the same standard, with UV spectrum match.
- Related flavonoids and residual solvents reported per batch.
- Colour and appearance consistent lot to lot, which matters for capsule and beverage applications.
- COA, specification sheet and safety data sheet accompany each shipment.
How This Grade Differs
This is a purified single compound, not a plant-ratio extract. A ratio extract without a named fisetin assay should not be treated as equivalent to a 98.0% fisetin specification. Compare the analyte, analytical method and offered-lot result.
Quality and Documentation
Each lot is assayed against an external standard with the calibration curve recorded in the batch file, then checked for related flavonoids, loss on drying, heavy metals and microbiology.
Regulatory Note
This material is supplied as a reference and industrial raw material. It is not offered as a food, dietary supplement or finished pharmaceutical product. Regulatory status, permitted uses, import licensing and labelling are the buyer’s responsibility for the destination market.
Frequently Asked Questions
What specification defines Fisetin Powder 98%?
98.0%, tested by HPLC (external standard).
How is this grade positioned against the other forms offered?
This is a purified single compound, not a plant-ratio extract. A ratio extract without a named fisetin assay should not be treated as equivalent to a 98.0% fisetin specification. Compare the analyte, analytical method and offered-lot result.
What must the certificate of analysis report for this product?
Assay: 98.0% by HPLC calibrated against an external reference standard. Quantitation basis stated on the COA, so results are comparable across suppliers. Identity confirmed by retention time against the same standard, with UV spectrum match.
What should a buyer confirm before the first order?
Fisetin is one of the grades where two suppliers can both claim 98% and still ship different material. Three points decide whether the lots are equivalent: the quantitation basis, the identity confirmation, and the related-flavonoid ceiling.
Are you a manufacturer or a trading company?
LongBio is Shaanxi Longsheng Biotechnology Co., Ltd., a direct manufacturer of botanical extracts and functional ingredients integrating R&D, production and export support. Factory review can be arranged by video or an on-site visit.
Can I request the current batch COA before ordering?
Yes. Request the applicable current or representative COA and compare product identity, method, limits and results before approving a purchase order.
What is the minimum order quantity?
The regular MOQ is typically 1 kg. An evaluation sample of 10-20 g can usually be arranged before a formal order, subject to stock.
Do you support custom specifications or packing?
Alternative assay targets, particle size, packing and private-label requirements can be reviewed case by case, subject to production feasibility and a revised written specification.
Request COA, Sample or Quotation
Send your target specification, application, order quantity, destination country and required test limits.
Get the current batch COA, a sample or a quotation
