Qualifying a clove extract supplier is mostly an exercise in one question: can they prove the eugenol came from clove buds? The gap between the best and worst material on the market is invisible in a sample bag — both are dark aromatic powders that assay fine — and the industrial eugenol market makes hitting the number without supplying the botanical unusually easy. This is a weighted framework for scoring suppliers on what actually predicts a genuine, repeatable material.
Before You Score Anyone: Three Disqualifying Red Flags
These are not point deductions. They are reasons to stop.
- A CoA that assays eugenol by UV, or names no method at all. Eugenol is volatile; the industry-correct method is GC, and a UV figure is satisfiable with material that contains very little clove bud. A supplier whose standard document does not say "by GC" is either under-equipped or counting on you not asking.
- Refusal to report eugenyl acetate. The acetate figure is the bud-origin fingerprint, it comes off the same chromatogram as the assay, and reporting it costs a properly equipped supplier nothing. A refusal has one plausible explanation.
- A price materially below the market with no explanation. Clove bud has a real, internationally traded floor price. An extract quoted well under the cluster of serious offers is priced off stem oil, leaf oil or synthesis — ask what the explanation is, and expect not to like it.
On the price point: collect five quotations, discard the highest and the lowest, and treat the middle three as the market. In clove specifically, the outlier low quote has a ready-made mechanism behind it — the eugenol spot market — that does not exist for most botanicals. Investigate it, don't celebrate it.
The Scoring Framework
Weighted to 100 points across five dimensions. Score each supplier independently, ideally before you see their price, so commercial pressure does not colour the technical assessment.
1. Documentation and Analytical Rigour — 30 points
| Criterion | Points |
|---|---|
| Batch-specific CoA (not a generic specification sheet) with methods named per parameter | 8 |
| Eugenol assayed by GC, stated on dry basis | 7 |
| Eugenyl acetate and β-caryophyllene reported per batch | 5 |
| TLC identity against reference eugenol | 4 |
| Acid-insoluble ash, residual solvent and aflatoxin lines present | 4 |
| Carriers and excipients declared by name and percentage | 2 |
2. Testing and Compliance Readiness — 25 points
| Criterion | Points |
|---|---|
| Heavy metals by ICP-MS with numeric per-element limits (not "complies") | 6 |
| Full USP microbiological panel including pathogens | 5 |
| EU pesticide MRL screening available with a real report | 5 |
| Non-ETO declaration, with LC-MS/MS testing available | 5 |
| Testing at a NABL-accredited (or ISO 17025 equivalent) laboratory | 4 |
The ETO line is weighted deliberately. Clove is a dried spice-derived material — squarely inside the category that triggered the EU's ethylene-oxide enforcement wave — and a positive finding at import means the consignment is destroyed, not discounted. A supplier who has never been asked about ETO has never shipped seriously into the EU. See our guide to EU import requirements for botanical extracts for the wider picture.
3. Traceability and Bud-Origin Assurance — 15 points
| Criterion | Points |
|---|---|
| Bud-only, correct-species declaration on every batch (stem/leaf/synthetic excluded) | 5 |
| Country and region of origin stated for the raw buds | 4 |
| Batch traceable back to raw-material lot | 3 |
| Isotope-ratio (natural-origin) testing available on request | 2 |
| Organic certification chain intact where organic is claimed | 1 |
4. Consistency and Capability — 15 points
| Criterion | Points |
|---|---|
| Three consecutive batch CoAs provided showing assay consistency | 6 |
| Multiple grades available (60–70%, 70–80% dental-pharma, water-soluble, organic) | 4 |
| Custom specification capability confirmed in writing | 3 |
| Retention samples held and available | 2 |
The three-consecutive-batch request is the single most underused tool in botanical procurement. One CoA tells you what a supplier can do on their best day; three consecutive ones tell you what their process holds. Watch the acetate figures across the three as closely as the eugenol — a bud-derived process produces correlated numbers, and a blending operation does not.
5. Commercial Terms and Responsiveness — 15 points
| Criterion | Points |
|---|---|
| Incoterms quoted properly (EXW/FOB/CIF/CIP) to your named destination | 4 |
| Written payment terms on a proforma invoice, not verbal | 3 |
| Realistic stated lead times, including documentation | 3 |
| Samples supplied with the same CoA standard as bulk | 3 |
| Technical questions answered by someone who understands the chemistry | 2 |
That last line is worth more than its two points suggest. Ask the commercial contact why eugenyl acetate matters. A supplier whose sales desk can answer without escalating has genuine technical depth behind it.
Interpreting the Score
| Score | Reading |
|---|---|
| 85–100 | Qualified for bulk supply. Proceed to sample and pre-shipment verification. |
| 70–84 | Workable with conditions. Identify the gaps and require them closed in writing before first bulk order. |
| 55–69 | Suitable for trial quantities only, with independent testing on every lot. |
| Below 55 | Not a supplier for a regulated market. The documentation burden will fall on you. |
The Sample Stage Is Part of the Assessment
- Does the sample come with a batch-specific CoA — with the GC method named and the acetate figure on it? A generic specification sheet is a sample from an unknown lot.
- Is the sample from a production batch or a golden lot? Ask for the batch number, then order bulk against that same specification and verify.
- How long did it take? Seven to fourteen business days including documentation is normal for India-origin material.
- Did they ask you anything? A supplier who does not ask whether you need the dental-pharma grade, a water-soluble format or an EU-bound compliance pack is not going to catch a mismatch before it becomes your problem.
First-Order Protocol
- Nominate an independent laboratory — Eurofins, SGS or Intertek — for pre-shipment sampling and testing, at your cost. Have them run the full GC profile, not just the eugenol total.
- Compare the independent report line by line against the supplier CoA. Small variances are normal; a directional pattern is not.
- Retain your own sealed, dated sample of the shipped lot for the shelf life of the material.
- Re-verify independently at batch three and then annually, or on any change of raw-material origin or manufacturing site.
SV Botanica supplies bulk clove extract from certified manufacturing facilities in India with batch-specific CoAs from NABL-accredited laboratories, and welcomes buyer-nominated third-party pre-shipment testing. The full parameter list is on the clove extract product page; the specification logic behind it is in the buyer's guide, and the failure modes it defends against are in adulteration and authenticity.
Source Standardised Clove Extract from India
Eugenol 60–70% by GC · 70–80% dental-pharma, water-soluble & organic grades · CoA-backed · samples for qualified buyers