Is jasmine sambac concrete seasonal, and how does that affect availability?
Yes — Jasminum sambac flowers over a warm-season window and the fresh flower is perishable (with night-peaking fragrance driving same-night processing), so flower supply is seasonal and crop-dependent (weather and yield swing price and availability). Because the concrete is globally a low-volume precious material, the concrete itself needs planning.Top keeps buffer stock of standard grades and contracts flower volume; for large or steady volumes we recommend an LTA to reserve extraction slots and stabilize price against crop swings. We communicate flower-market conditions on each quotation. (Note: keep jasmine sambac concrete as a distinct line from jasmine sambac essential oil /...
What is your sample policy for jasmine sambac concrete?
Top supports evaluation with 5-10 g samples (sometimes up to about 20 g for qualified buyers), drawn from current stock or a fresh extraction, shipped with COA plus GC-MS (benzyl / indole fingerprint). Samples are usually charged at the sample-tier price (or free for strategic / qualified accounts) plus freight.We recommend requesting the sample from the same lot you intend to purchase so the floral fingerprint and yield match your production batch. Sample lead time is short (stock) or aligned with the next extraction window.Tell Top your application and preferred grade and we will suggest a representative sample.
How much do samples cost and how fast do they ship?
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 extraction lot is needed, 10-20 days (flower sourcing plus extraction plus dewaxing plus QC).Top can express-ship via DHL / FedEx. As a waxy concrete with low hazard, samples ship with an SDS. Provide your courier account or let Top quote the freight.
What is your returns and refund policy?
Because this is a natural, batch-specific concrete, returns are handled case-by-case. If Top's own lot data (COA plus GC-MS) 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.
Which plant part is the concrete extracted from?
From the fresh, just-opened jasmine sambac blossom — not leaf, stem or root. Top's COA states "raw material: fresh J. sambac flower".Jasmine flowers are tiny and low-yield, and the fragrance peaks at night / early morning, so flowers are hand-picked at dusk and processed immediately (often the same night) into the concrete. The concrete carries the full floral wax + aroma complex (it is the "concrete", not the de-waxed "absolute"), so it is a paste/wax-like material — exactly why it is classed as a concrete rather than a fluid essential oil.
What regulatory support and documents do you provide for import?
Top supports import compliance with: COA (Q/XXXX conformance) plus GC-MS (benzyl / indole fingerprint) plus GC-HS (solvent residue) plus sensory sheet, CLP-format SDS (EU), certificate of origin, and references to the relevant frameworks — China: GB 2760-2024 (jasmine food-use verification), GB 5009.262 (solvent residue), GB/T 11538-2006 (GC), GB/T 39010-2020, GB/T 14454.2-2008, GB/T 14455.5-2008, GB/T 22292-2008 (jasmine tea flower system), Cosmetic Safety Technical Specification; International: ISO 9235:2013, CAFFCI group standard (verify), FEMA 2598, IFRA, EU 1334/2008, EU 1223/2009, CLP 1272/2008, REACH 1907/2006, US 21 CFR 182.20 GRAS. For market-specific needs (health cert, Halal, organic) tell Top early.We document that this is...
Can you re-test or re-analyze a lot after delivery?
Yes. Top keeps a retention sample for every lot and can re-test within the shelf life on request (GC-MS benzyl / indole fingerprint, melting point / refractive index, moisture, solvent residue, heavy metals).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.
What quality control and in-house lab capabilities do you have?
Top operates in-house QC with: GC-MS (benzyl alcohol / benzyl acetate / indole floral fingerprint, plus cis-jasmone / methyl jasmonate trace), GC-HS (headspace, solvent residue), refractometer / melting-point apparatus (concrete grade), Karl Fischer moisture, analytical balance (yield), plus titration and sensory panel (intense indolic sweet jasmine). Heavy metals per food-safety / Cosmetic Safety Technical Specification.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.
How do you guarantee purity and authenticity of jasmine sambac concrete?
Authenticity is guaranteed byQ/XXXX conformance andPer-batch GC-MS benzyl / indole floral fingerprint plus melting point / refractive index / yield, plus solvent-residue-free confirm, plus the COA species + "fresh flower / solvent concrete" declaration (Jasminum sambac, distinct from synthetic jasmine or other floral-wax padding).Top does not dilute with carrier oils or pad with other flower wax; the COA states 100% pure solvent-extracted jasmine sambac concrete (or the agreed dilution). The natural benzyl-alcohol / benzyl-acetate / indole ratio (with cis-jasmone and methyl jasmonate trace) is the authenticity proof — synthetic or adulterated material lacks this complex.Lots failing the profile or purity...