How to read the eucommia male flower extract specification, line by line
What we settle before a eucommia male flower extract sheet leaves this desk. This is one of the few botanicals where the buyer cannot start from a market-standard grade, so we first establish which of the two assay lines leads their label and what minimum they need on the other, and whether the quotation covers the pure extract or the maltodextrin-carried version — those two are not price-comparable. Then the lot COA that would actually ship. We represent a GMP-audited plant as its authorized export sales representative, so anything outside the standard grade is confirmed with the plant.
A eucommia male flower extract specification is short, and most buyers read it in the wrong order: they look for one potency number, find two assay lines, and put the sheet down. The two lines are the point. This article reads it properly — identity, the assays and what per-lot release commits to, the physical limits and the method behind each number, then carrier and documentation. The commercial side is in our sourcing guide, and format choices in our applications article.
Two assay lines, and what per-lot release commits to
Most botanical extracts hang their identity on a single marker. Eucommia male flower carries two, total flavones and chlorogenic acid, both by HPLC. Neither is decorative: the fractions move independently through a real extraction, so a lot strong on one axis and thin on the other is a different material from one that balances both.
Because the sheet states a method and a reporting basis rather than a fixed grade, what you buy is a documented minimum you set, verified on the lot that ships. Read correctly, that beats a catalogue percentage: which line leads your label, what floor you accept on the second, and whether the method is named identically on datasheet and COA.
The botanical, part and solvent lines
The source line reads Eucommia ulmoides male flower, and the part used reads flower — not leaf, not bark, which circulate under similar trade names with a different profile. If a sheet is vague about the part, consider the whole document unverified. The solvent line reads water or ethanol-water: a process record, not a purity claim, and it matters to buyers declaring the extraction or working inside an organic or kosher scope.
The physical lines and the method behind each number
Every figure below comes from our standard sheet with its analytical basis beside it. If a supplier cannot say how a number was obtained, it is a marketing figure rather than a specification.
| Line | Our standard grade | Method / basis |
|---|---|---|
| Botanical source | Eucommia ulmoides male flower | Botanical identity |
| Part used | Flower | Identity check |
| Extraction solvent | Water, or ethanol-water | Process record |
| Total flavones | Released per lot COA | HPLC, per lot |
| Chlorogenic acid | Released per lot COA | HPLC, per lot |
| Carrier | None; maltodextrin on request | Formulation record |
| Particle size | 80 mesh standard, 100 on request | Sieve |
| Loss on drying | 5.0% or less | Gravimetric, oven drying |
| Total ash | 5.0% or less | Gravimetric, muffle furnace |
| Packing | 25 kg fibre drum, double PE liner | — |
Two lines do more work than buyers expect. Loss on drying at 5.0% or less is free moisture, and on a hygroscopic flower extract it predicts whether the powder still flows in month twelve. Total ash at 5.0% or less is the residue after incineration, the fastest check that the extract has not been extended. Mesh is a process decision: 80 blends without milling, 100 for processes that need it.
Carrier, packing and what the lot COA adds
Our default is a pure extract with no carrier. Maltodextrin is available on request, and there is a reason: the powder is hygroscopic enough that in humid filling rooms or on stick-pack lines a small carrier fraction saves more in process hassle than it costs in label space. What should never be ambiguous is which version a quotation covers.
Packing is a 25 kg fibre drum with a double polyethylene liner, with 1 kg and 5 kg foil bags for samples and pilots; shelf life is 24 months unopened. Every lot ships with a batch COA. The sheet states what the grade commits to, the COA states what the lot tested, and on a marginal lot those are two documents — compare the COA that would ship with your order.
How we read a sheet against a quotation
Two offers side by side, four things in order: the part used, the two assay lines with their method, the carrier status, the documentation offered. Part first, because flower and leaf are different materials at different prices. Assays second, because a single-line sheet cannot be compared with a two-line one. Carrier third, because a maltodextrin-cut powder quoted 15% cheaper often is not cheaper.
Where a buyer needs a different mesh, a carried grade, or a minimum written on both assay lines, we confirm feasibility and lead time with the plant within one business day. OEM packing under the buyer's own brand is drum-and-label work, and does not change the powder.
Frequently asked questions
What does a eucommia male flower extract specification standardise?
Two assay lines, and only two: total flavones and chlorogenic acid, both by HPLC and both released per lot COA. There is no market-standard percentage here, so the buyer sets the minimum on each line. The rest is fixed: flower part, water or ethanol-water extraction, brown fine powder, 80 mesh standard with 100 mesh on request, loss on drying and total ash each at 5.0% or less.
How is each number on the sheet analysed?
The two assays are by HPLC, reported per lot. Particle size is a sieve figure, 80 mesh or 100 on request. Loss on drying is a gravimetric oven result, 5.0% or less; total ash is a gravimetric muffle-furnace residue at the same limit. Appearance is checked visually against the retained sample.
Does the sheet cover the pure extract or the maltodextrin version?
Both, and the quotation has to say which one it prices. The standard grade carries no carrier; maltodextrin is available on request where a process needs better flow in humid rooms or stick packs. A carried material is not price-comparable with a pure extract, because part of what you are buying is maltodextrin.
Related reading
- Where eucommia male flower extract fits: four formula categories
- How to source eucommia male flower extract: the two-assay ingredient
Related: Eucommia Male Flower Extract — full specification, grades and documentation. Compare with Epimedium Extract and Salidroside.