Show your work, or do not make the claim
This category has a documentation problem: material sold under a name that turns out to be something else. The answer is not adjectives, it is analysis. Here is exactly what we test, what you receive, and how you can verify it independently.
Identity by chromatography
The single most important question about any 13-OH material is whether it is actually 13-OH and not its cheaper parent alkaloid. HPLC answers it definitively.
Under our method the two compounds resolve as clearly separated peaks — tetrahydropalmatine at 15.0 minutes, 13-OH at 18.8. A sample of THP cannot present as the derivative, and a blend of the two shows both. The method in detail.
What every lot carries
Certificate of analysis
Identity and assay for the specific lot you received, with the lot code that matches your container. Material typically runs 93–98% active.
Chromatogram on request
The actual trace for your lot, so your technical team can see the separation rather than take our word for the number.
cGMP manufacturing
Produced in our own facility under 21 CFR Part 111, with the batch records that standard requires.
Lab report library — coming shortly
We are building a searchable library of lot certificates so any buyer can look up a batch code and see its documentation without asking anyone. Until it is live, request a certificate for current material at sales@corydalislabs.com and we will send it the same day.
Verify us independently
We would rather you did. A supplier that discourages third-party verification is telling you something.
- Send material to your own lab. The separation from THP is unambiguous under standard reverse-phase HPLC conditions; any competent analytical lab can run it.
- Ask us for method parameters. We will share the conditions we use so your lab can set up quickly rather than developing a method from scratch.
- Compare lot to lot. Consistency across lots is the thing that actually matters in production, and it is visible in the certificates.
Frequently asked questions
Yes. Ask and we will send a representative certificate for current material. Every lot you buy ships with its own.
We would encourage it. Send material to any competent analytical lab; the compound separates cleanly from its parent alkaloid by HPLC, so verification is straightforward. We will share our method parameters if it helps your lab set up.
Identity and assay at minimum, with contaminant panels available. Lot-specific chromatograms accompany the certificate on request.
Yes — we manufacture in our own facility under 21 CFR Part 111 current good manufacturing practice.
Ask for a certificate
Tell us what you are evaluating and we will send a representative certificate of analysis for current material, along with our identity method parameters if your lab wants them.