What is your order process and typical steps?
Typical flow:Inquiry with grade / volume / pack / destinationTop sends proforma invoice plus FOB quote plus specs (Q/XXXX)Buyer confirms and pays deposit (or opens L/C)Top produces / picks stock, runs QC plus GC-MS plus sensory, issues COAShipment with full documentsAfter-sales (traceability, re-test, complaint channel).For new buyers we may start with a sample order. Lead times follow the agreed schedule.Top keeps one point of contact so the buyer always knows the order status.
Is there a national or ISO standard for osmanthus concrete?
There is no single GB/T or QB/T product standard for osmanthus concrete (std.samr.gov.cn has no entry) and no dedicated ISO (international none for osmanthus concrete). Top builds the spec on: a CAFFCI group / association standard (verify current) for osmanthus concrete/absolute, the enterprise standard Q/XXXX (melting point / refractive index / yield + β-ionone GC fingerprint + solvent residue), and GB 2760-2024 (food-use verification). MethodsGB/T 11538-2006 (GC), GB 5009.262 (solvent residue), GB/T 39010-2020, GB/T 14454.2-2008, GB/T 14455.5-2008. ISO 92352013 covers "concrete" terminology.Buyers may name Q/XXXX as acceptance basis. Top keeps a shared QC ledger with GD01 osmanthus absolute (concrete ->...
What is your minimum order quantity (MOQ)?
MOQ1 kg (samples 5-10 g available).Because osmanthus concrete is a processed floral material (not an endangered-species material, and not CITES), trial quantities are supported. Standard Commercial PacksPacked in clean, dry aluminium bottles or brown glass bottles without mixed gas, or packed according to clients' requests.Recurring / contract volumes get priority allocation. If you need below 1 kg for lab evaluation, contact Top — we may supply a paid micro-sample.MOQ and pack options are confirmed on the quotation.
Can we set up a long-term supply agreement (LTA)?
Yes. For steady volume, Top recommends an LTA / annual framework that reserves solvent-extraction slots and osmanthus-flower sourcing ahead (ideally before the autumn flowering season), stabilizes price (with a review mechanism to manage the weather/crop-sensitive osmanthus market) and prioritizes your allocation.The LTA specifies grade (Q/XXXX or your spec), pack size, volume bands, lead time, quality agreement and complaint handling. Buyers under an LTA get buffer-stock priority and a dedicated contact.Because osmanthus concrete is seasonal and crop-sensitive, an LTA is the most reliable way to secure consistent supply and predictable cost — contact Top with your annual forecast.
What is the lead time from order to delivery?
Lead TimeBuffer-stock standard grade 3-7 days to dispatch; fresh extraction 10-20 days (flower sourcing plus extraction plus dewaxing plus QC plus documentation).After dispatch, transit depends on incoterm (FOB Shanghai, sea to EU/US about 25-40 days; air 3-7 days). Top gives a firm dispatch date on the proforma and keeps the buyer updated.Because osmanthus is seasonal and weather/crop sensitive, order ahead — especially before the autumn flowering season — to lock price and availability.
What defines the composition of osmanthus concrete?
It is a floral wax + aroma concentrate whose signature is the β-ionone / ionone-series floral complex (apricot, peach, orris-like, woody-floral) plus linalool, linalyl acetate, cis-/trans-linalool oxide, nerol oxide, and minor flower wax esters. Top fingerprints the β-ionone series by GC-MS as the authenticity marker (synthetic osmanthus or blends lack the natural ratio).The concrete also contains flower wax, so it is a paste, not a clear oil. Each COA reports the GC floral fingerprint and the wax/non-wax balance; the identity is the natural osmanthus ionone spectrum, not a single terpene.
Which Incoterms do you support?
Top commonly trades on FOB (Shanghai / Guangzhou), CIF / CFR, EXW, and DAP / DDP by agreement. FOB is default for most B2B buyers (you arrange main freight and insurance).For buyers wanting simplicity we can quote CIF/CFR (we arrange freight) or DAP/DDP (delivered to your door with duties handled). The chosen Incoterm is stated on the proforma and affects who books freight and where risk transfers.Tell Top your preference and we will align documentation.
What IFRA and allergen compliance should buyers observe?
Osmanthus concrete is a low-sensitiser natural floral material (no classic IFRA-restricted terpenes / phototoxins among its main constituents), but buyers should still screen under IFRA and the EU 26-allergen list and follow the Cosmetic Safety Technical Specification (China) and EU 1223/2009 allergen labelling. Top supplies the material and supports the safety review; for sensitive categories (baby, leave-on near mucosa) keep levels conservative.Food use follows GB 2760-2024 / EU 1334/2008 / US 21 CFR, not IFRA. The buyer's formulator remains responsible for end-product compliance.Because the concrete carries residual solvent if not fully recovered, Top confirms solvent residue (GB 5009.262) so the...
Do you test heavy metals and residual solvents?
Yes. Every lot is heavy-metal screened (Pb, As, Hg, Cd per food-safety / Cosmetic Safety Technical Specification limits) on the COA.Because extraction uses food-grade solvent, we verify solvent residue with GB 5009.262 (not detected) — this is critical for a concrete, and Top reports it explicitly per lot. For cosmetic/food use we confirm residue is within the target market's limit.We do not release a lot exceeding heavy-metal or solvent-residue limits. Buyers can request the specific panel and third-party verification.