Sample CostThe sample-tier unit price for 5-10 g (often waived for qualified / strategic buyers) plus international freight. Lead TimeStock samples 3-7 days; if a fresh batch is needed, 10-20 days (sourcing plus processing plus QC).Top can express-ship via DHL / FedEx. As a low-hazard material, samples ship with an SDS where applicable. Provide your courier account or let Top quote the freight.

Because this is a natural, batch-specific material, returns are handled case-by-case. If Top's own lot data (COA plus assay) confirms a specification failure, we arrange replacement or refund of the affected quantity; return of unused, sealed material may be requested for verification.For buyer-side issues (wrong grade ordered, changed mind), returns are by mutual agreement and may incur restocking. All returns/refunds follow the signed contract and Incoterms; we keep the process transparent and documented.

From the the green plum fruit (after pitting). Top's COA states "raw material: Prunus mume fruit".The fruit is extracted; no bark or resin is involved.

Top supports import compliance with: COA (Q/XXXX conformance) plus assay (key markers + heavy metals + microbiology + sensory) plus sensory sheet, CLP-format SDS (EU), certificate of origin, and references to the relevant frameworks — Q/XXXX enterprise standard; references GB 2762, GB 2760, GB 5009 series, GB 4789 series, and the NHC medicine-food dual-use list. For market-specific needs tell Top early.We document that this is a processed natural product (not a distilled essential oil where stated) — important for correct customs and formulation classification. Top adds the health / phytosanitary certificate for import on request.

Yes. Top keeps a retention sample for every lot and can re-test within the shelf life on request (key markers, heavy metals, micro, solvent residue).If a buyer disputes a result, we compare our retained-sample data with the original COA; a third-party lab (SGS, Eurofins) can be engaged for an independent read, with costs allocated by outcome. Re-testing protects both sides and is a standard part of our traceability commitment.

Top operates in-house QC with: HPLC / GC for the key markers, solvent-residue and heavy-metal checks, peroxide/acid value (freshness), plus microbiology and moisture/ash per the relevant standards. Out-of-spec lots are blocked.We can arrange third-party verification (SGS, Eurofins) at buyer cost and keep retention samples for re-testing within shelf life.