Most supplier problems are visible before the first purchase order. They hide in a missing specification version, a COA without a method, a carrier that appears only on the invoice, or a price that is too low for the plant part being claimed. A structured qualification process finds them while switching costs are still low.

Download Download the 40-point supplier qualification checklist A printable PDF for your procurement and quality team.

1. Entity and facility

Confirm the legal entity, the manufacturing site, and who actually produces the extract. A trading company can be a legitimate partner, but the buyer should know whether the specification is controlled by the manufacturer or by an intermediary. Ask for the business license, the site address, and the certification scope.

If a certificate is presented, check the certificate holder, the site, the validity dates, and the product or process scope. A facility certificate does not automatically cover every product made in the facility.

  • Legal name and registration document
  • Manufacturing site address, not only the sales office
  • Certificate holder, scope, and validity
  • Who controls the specification and the COA
  • Named commercial and technical contacts

2. Specification and analytical methods

Ask for the full specification before the price. It should state the botanical name, plant part, marker range, method, calculation basis, physical parameters, contaminant limits, carrier, packaging, and MOQ. If the supplier cannot send it, the quotation is not comparable with anyone else's.

Check that the method matches the marker. A UV family total and an HPLC single-compound assay are not interchangeable. Ask for a representative COA and, for high-value botanicals, a chromatogram. Confirm whether results are as-is or on a dry basis.

  • Full specification with revision date
  • Botanical name and plant part
  • Marker range, method, and calculation basis
  • Physical parameters and contaminant limits
  • Representative COA and chromatogram
  • Carrier and extraction solvent

3. Documentation pack

A professional supplier can send a complete pack without a chase: COA, TDS, SDS, allergen statement, GMO statement, and origin record. Additional documents — pesticide, heavy metals, residual solvents, microbiology, Halal, Kosher, organic — depend on the grade and the market, and should be confirmed in the quotation rather than assumed.

Read the documents for consistency. The lot number on the COA should match the drum and the packing list. The plant part on the TDS should match the specification and the label. The carrier on the TDS should match the allergen and GMO statements.

  • COA tied to a lot and a specification version
  • TDS with plant part, carrier, solubility, and storage
  • SDS specific to the grade
  • Allergen and GMO statements
  • Origin and traceability record
  • Certificates with scope and validity

4. Traceability and change control

Ask how the herb lot is linked to the extract lot and how long records and retained samples are kept. A supplier who cannot describe the link between raw material and finished lot cannot investigate a complaint properly. Ask what happens if a batch fails and who makes the release decision.

Change control is the quiet test. Ask what would happen if the plant part, solvent, carrier, or marker method changed. A supplier with a real system will describe a written change notification and a new specification revision. A supplier without one will say 'no change' and hope the question goes away.

  • Herb lot to extract lot linkage
  • Retained sample policy and retention period
  • Deviation, rework, and rejection process
  • Change notification and specification revision
  • Complaint investigation and corrective action

5. Commercial and sample stage

Confirm MOQ, price break points, lead time, Incoterms, payment terms, and who pays freight and samples. Ask for a sample with its own COA and test it in your matrix. Keep half the sample for comparison with the first production lot.

Run the first order as a qualification exercise: check the documents against the lot, test the material on arrival, and compare it with the sample. A supplier who passes the first order and repeats it consistently is worth a longer agreement.

  • MOQ and price break points
  • Lead time after specification approval
  • Incoterms, freight, and insurance
  • Payment terms and currency
  • Sample COA and retained comparison sample
  • First-order acceptance criteria

6. Red flags worth a second look

A COA that is identical across lots, a specification without a method, a price far below the market for a known plant part, a carrier that appears only at the last minute, or a refusal to put the plant part in writing are all reasons to slow down. None of them proves fraud. Together they describe a supplier whose documents are not yet doing the work.

The qualification process is not bureaucracy. It is how a buyer avoids discovering a specification mismatch after the batch has been blended into a finished product.

What to take away

  • Qualify the entity, the site, and the document system — not only the price.
  • The full specification should arrive before the quotation.
  • Read the COA, TDS, and allergen statement against each other for consistency.
  • Ask what happens when something changes; the answer reveals the system.
  • Use the first order as a qualification exercise and retain a sample.

References and further reading

Cite this note

Rainwood Botanical. "How to qualify a botanical extract supplier: a 40-point checklist." Blog, 2026-10-24. https://ingredients.rainwoodbio.com/blog/how-to-qualify-a-botanical-extract-supplier/

About this post

Written by the Rainwood Botanical technical team for business-to-business sourcing. It describes analytical and documentary practice, not medical or regulatory advice for a finished product. Market requirements should be confirmed with your regulatory advisor. Read more about our quality and documentation approach and our editorial policy.