What quality control and in-house lab capabilities do you have?
Top operates in-house QC with: GC-MS (β-ionone / ionone-series floral fingerprint), GC-HS (headspace, solvent residue), refractometer / melting-point apparatus (concrete grade), Karl Fischer moisture, analytical balance (yield), plus titration and sensory panel (sweet apricot/peach osmanthus note). 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 osmanthus concrete?
Authenticity is guaranteed byQ/XXXX conformance andPer-batch GC-MS β-ionone floral fingerprint plus melting point / refractive index / yield, plus solvent-residue-free confirm, plus the COA species + "fresh flower / solvent concrete" declaration (Osmanthus fragrans var. thunbergii, distinct from synthetic osmanthus 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 osmanthus concrete (or the agreed dilution). The natural β-ionone ratio (β-ionone : dihydro-β-ionone : linalool : linalyl acetate : nerol oxide) is the authenticity proof — synthetic or adulterated material lacks this complex.Lots failing the profile or purity...
What is your production capacity for osmanthus concrete?
Capacity is solvent-extraction-slot plus osmanthus-flower-supply dependent: Top allocates extraction runs across committed orders. Osmanthus fragrans flowers are a low-yield autumn crop, so annual volume is naturally limited and weather/crop sensitive.Large volumes are feasible but need lead-time planning, ideally ahead of the autumn flowering season. We keep a small buffer of standard grades and recommend an LTA / annual framework for steady buyers so extraction slots and flower sourcing are reserved ahead.Tell us your annual volume and we will size the allocation and confirm lead time.
What factors influence the osmanthus concrete price?
Main drivers:Grade — standard vs de-waxed absolute-gradeΒ-ionone floral fingerprint strengthOrganic certificationFlower feedstock cost (seasonal, weather/crop dependent)Solvent extraction + dewaxing costPack size and volumeCurrency / freight.FX and freight quoted separately. Top explains the drivers on each quotation, and flags that osmanthus is a market-sensitive seasonal crop.
Do you allow pre-shipment inspection (PSI) before loading?
Yes. Buyers or their inspector may perform pre-shipment inspection at Top's facility or the forwarder's warehouse before loading — verifying pack integrity, net weight, lot numbers, labelling and sealing, and drawing samples for independent lab tests (including GC-MS β-ionone fingerprint, melting point, moisture, solvent residue for osmanthus concrete).PSI also confirms correct sealed / low-oxygen packing. Top schedules PSI into the lead time and provides access to the lot and documents.If PSI finds a discrepancy, we resolve it (re-pack, re-test, replace) before the cargo is booked. PSI is coordinated alongside the agreed Incoterm.
What are the typical physicochemical specifications?
Osmanthus concrete is a soft, waxy, paste-to-semi-solid aromatic mass (yellow to green-yellow or brown-yellow), with the characteristic sweet, apricot/peach, tea-like osmanthus scent. Typical window (each COA states the measured batch value): melting point within the concrete range (it softens/melts on warming); refractive index per the concrete; yield / non-wax content declared; solvent residue not detected (GB 5009.262).Insoluble in water; soluble in ethanol and most oils; partly soluble in fixed oils. Because it is a concrete (waxy), it is dosed/melted and diluted rather than used neat.Top conforms to Q/XXXX and reports the floral fingerprint per batch.
What payment terms do you offer?
Top offers flexible terms by partnership stage: T/T (30% deposit plus 70% against B/L copy, or 100% prior for small orders), L/C at sight for established B2B buyers, and negotiated terms for long-term contracts / LTAs. For first orders we typically require advance payment or a confirmed L/C. Samples are usually paid upfront (often net, sometimes free for qualified buyers).Tell Top your preferred method and we will align the contract; payment terms are stated clearly on the proforma invoice.
What packaging materials and sizes are available?
Because osmanthus concrete is a waxy, aroma-sensitive material (the floral can dull / the wax can oxidize on exposure), packaging uses clean, dry aluminium bottles or brown glass bottles without mixed gas (light-protected and sealed), or packed according to clients' requests. We pack sealed and labelled; keep away from heat and light.Keep away from heat and light. Damaged-pack claims are handled per the Incoterms and our complaint process.
Is this osmanthus concrete organic or wildcrafted?
Osmanthus is a cultivated flowering shrub (wildcrafted does not apply). Organic certification (EU 2018/848, NOP / USDA, or equivalent) can be arranged for dedicated lots from certified-organic osmanthus orchards, subject to segregated handling and lead-time / premium.Conventional (non-organic) lots are the default. Top can issue a non-GMO declaration; the COA states whether a lot is organic-certified or conventional.For organic osmanthus concrete, the flower sourcing and extraction must be under organic control — tell Top early so we reserve a certified run.