Comparison
API grade vs research grade: what actually changes
Research grade means a named compound at a stated purity with identity and assay on a certificate for the lot. API grade means the same compound made under ICH Q7 from a defined starting material, with every impurity above threshold identified and the significant ones toxicologically qualified, stability data behind the retest date, and a file a drug sponsor can reference. The molecule is identical. What differs is how much of its history is documented, and who is accountable for that documentation.
What actually changes between the two grades?
Not the compound. A 99.9% research-grade isolate and an API of the same compound can come off similar chemistry and read almost identically on an assay. The difference is in the 0.1% and in the paperwork that describes it.
Research grade tells you what the material is. API grade tells you what it is, what else is in it, where each of those came from, how it behaves over eighteen months in the drum it ships in, and who a regulator can ask about any of it.
Is research-grade material good enough for my project?
For most of the work that actually gets done with these compounds, yes. A buyer who does not need API grade should not pay for the years it takes to produce one. Research grade with a lot certificate is the right purchase for:
- Analytical method development and validation.
- Receptor screens, cell work and animal studies.
- Formulation trials and stability screening.
- Cosmetic formulation, where ISO 22716 governs rather than drug GMP.
- Supplement formulation, where the regime is 21 CFR 111.
When is research grade not enough?
The moment your material goes into a person under a regulatory filing. An IND, a clinical batch, anything that references a Drug Master File: those need API grade, and no volume of high-purity research material substitutes for it.
If that is where you are, the honest answer is that for these seven compounds nobody in this market can supply you today. Plan for a custom synthesis programme with a manufacturer who will build the file with you, not for a catalogue order.
What does it take to move material from research grade to API grade?
Work measured in years rather than in a better purification step, which is why so few compounds make the journey.
- Fix the starting material and defend the point where GMP begins.
- Re-run the route under ICH Q7, with the change control and batch records that implies.
- Identify every impurity above the reporting threshold and qualify the ones above the qualification threshold, under ICH Q3A.
- Run stability under ICH Q1A in the real container, long enough to support a retest date.
- Assemble a Drug Master File a sponsor can reference without seeing the process.
Which grade does Peregrine sell?
Research grade, described as exactly that: ≥99.9% on the named isolates, identity by HPLC against a qualified reference standard, assay as percent by weight, and a certificate for the lot in the box. No GMP certification is claimed, no Drug Master File is filed, and none of these compounds is the active ingredient of an approved drug.
Peregrine is working to supply all of it — API-grade material, certified standards and GMP-declared volume — at research and industrial scale worldwide, through its own patented synthesis process.
| What you are buying | Research grade | API grade |
|---|---|---|
| Identity | Confirmed by HPLC against a qualified standard | Same, plus a validated method in a filed file |
| Purity | Assay on the lot certificate, typically ≥99.9% | Assay plus a characterised impurity profile |
| Impurities | Residual panels reported | Every impurity above threshold identified; significant ones qualified under ICH Q3A |
| Manufacturing | Documented, not regime-audited | ICH Q7 from a defined starting material |
| Stability | Storage condition and a retest date | ICH Q1A data in the shipping container |
| Regulatory file | None | Drug Master File a sponsor can reference |
| What it is for | Method work, preclinical, formulation, cosmetics, supplements | Material going into people under a filing |
Research grade and API grade, line by line
Questions
Is research grade the same as pharmaceutical grade?
No, and pharmaceutical grade is not a defined term in any case. Research grade means identity and assay on a lot certificate. Pharmaceutical grade means whatever the seller intends by it, which is why it cannot be written into a purchase order.
Can I use research-grade cannabinoid in a clinical trial?
Not as the investigational material under a filing. A clinical batch needs API-grade manufacture with the impurity, stability and regulatory file behind it. Research-grade material is appropriate for the preclinical work that precedes that point.
Does ≥99.9% purity make material API grade?
No. A material can assay at 99.9% and still have an uncharacterised remaining fraction. An API is judged on what that fraction is and whether it has been qualified, not on how high the headline number reads.
How long does it take to get a compound to API grade?
Years, in the ordinary case. The impurity qualification and stability programmes alone run long, and both sit downstream of fixing the route and the starting material. Nobody shortens it with a better purification step.
Which grade should I buy for cosmetic or supplement formulation?
Research grade with a lot certificate. Those products are governed by ISO 22716 and 21 CFR 111 respectively, neither of which requires drug-grade active ingredient manufacture.
Sources
- ICH Q7Good Manufacturing Practice Guide for Active Pharmaceutical Ingredients, Step 4, 2000
- ICH Q3A(R2)Impurities in New Drug Substances, Step 4, 2006
- ICH Q1A(R2)Stability Testing of New Drug Substances and Products, Step 4, 2003
- 21 CFR 210.3(b)(7)FDA's definition of an active ingredient
- 21 CFR 111Current good manufacturing practice for dietary supplements
- ISO 22716Cosmetics — Good Manufacturing Practices (paywalled)
The vocabulary
- What is an API (active pharmaceutical ingredient)?The regulatory definition, the five things it actually requires, and why a purity figure is not one of them.
- Where do I buy a cannabinoid reference standard?Who actually sells them, what the certificate must say, and why ISO 17034 and 17025 are not interchangeable.
- GMP ingredients: which GMP, and what each one coversFour unrelated regimes share the word. Which certificate means what, and the three questions that settle a claim.
- What does pharma grade mean?An empty phrase doing a real job badly — and the five-line specification that replaces it.
- How do you qualify a cannabinoid API supplier?Directory listings promise DMF and CEP against compounds that can hold neither. The questions that separate a manufacturer from a broker.
By compound
- CBG — API, standard and GMP statusNo approved drug uses CBG, no USP standard exists, and what GMP CBG usually means.
- CBGA — API, standard and GMP statusThe precursor acid: no monograph, no drug programme, and what its stability question is.
- CBGV — API, standard and GMP statusThe varin branch precursor: scarce, campaign-based, no monograph.
- CBDV — API, standard and GMP statusThe one with real clinical history — and what missing an endpoint does and does not change.
- THCV — API, standard and GMP statusWhere today's purity falls short of an API bar, stated plainly.
- CBN — API, standard and GMP statusThe only one with any pharmacopoeial presence — and why an impurity limit is not a standard.
- Cannflavin A — API, standard and GMP statusA prenylated flavone, not a cannabinoid: preclinical, milligram-scale, no bulk supply anywhere.