Definition
Where do I buy a cannabinoid reference standard?
From a reference-material producer, not from a bulk supplier. Cayman Chemical, Cerilliant, Supelco, LGC Standards and Restek list certified cannabinoid standards; what arrives is a vial of milligrams with a certificate of analysis and a traceable assigned value. No cannabinoid on this site has a USP Reference Standard or a European Pharmacopoeia Chemical Reference Substance, so every standard available today is certified by its producer rather than by a pharmacopoeia.
What is a reference standard, and how is it different from bulk material?
They are different products with different accreditation behind them, sold by different companies for different reasons. A reference standard carries an assigned value with a stated uncertainty, traceable to a recognised reference, so an analyst can calibrate a method against it. Bulk material carries a specification so a formulator can put it in a product.
The practical difference shows up in the quantity. A standard arrives as 1 mg or 10 mg in an ampoule, often as a solution, and costs more per milligram than bulk costs per gram. Buying a kilogram to calibrate an HPLC is the wrong purchase; so is calibrating against a jar of bulk isolate because it was cheaper.
Does ISO 17034 mean the same thing as ISO/IEC 17025?
No, and the pair is mixed up constantly. ISO 17034 accredits a producer of reference materials — the competence to assign a value and state its uncertainty. ISO/IEC 17025 accredits a testing laboratory — the competence to run a method and report a result.
A supplier holding 17025 can test your material. A supplier holding 17034 can sell you the standard you test it against. Neither accreditation is evidence of the other, and a certificate that names one while implying the other is worth a question.
Which cannabinoids have a USP or Ph. Eur. standard?
None of the ones discussed on this site. There is no USP Reference Standard and no Ph. Eur. Chemical Reference Substance for CBG, CBGA, CBGV, CBDV, THCV, CBN or Cannflavin A.
That matters if a method you are writing has to cite a compendial standard, because at the moment it cannot. A validated method against a manufacturer-certified CRM is defensible and widely used; it is not the same claim as compendial traceability, and a regulator reading your file will know the difference.
What should a reference-standard certificate tell me?
Five things. If any is missing, the vial is a chemical rather than a standard, whatever it says on the label.
- The assigned value and its uncertainty, not just a purity percentage.
- How the value was established — mass balance, qNMR, or an independent method.
- Traceability: what the value is traceable to, and through whom.
- The lot number, the expiry or retest date, and the storage condition.
- The producer's accreditation, with the scope it covers.
Will Peregrine supply certified standards?
It is on the roadmap alongside API-grade supply, and for the same reason: a compound nobody can make at volume is a compound nobody writes a monograph for. Supply comes first and the compendial work follows it.
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.
Questions
Where do I get a CBG standard?
From a reference-material producer such as Cayman Chemical, Cerilliant, Supelco, LGC Standards or Restek. It ships as a certified milligram vial. There is no USP or Ph. Eur. standard for CBG.
Where do I buy CBG standards, CBN standards or THCV standards?
All three from the same place: an accredited reference-material producer such as Cayman Chemical, Cerilliant, Supelco, LGC Standards or Restek. Each arrives as a certified milligram vial. None of the three has a USP or Ph. Eur. standard, so every one you can buy is certified by its producer.
Is a bulk isolate the same as a reference standard?
No. Bulk isolate carries a specification; a reference standard carries an assigned value with a stated uncertainty and traceability. Calibrating a method against bulk material undermines every result the method produces.
What is a certified reference material?
A material whose property value has been assigned by a competent producer, with an uncertainty and a traceability statement, under ISO 17034. In this market it is the only kind of cannabinoid standard commercially available.
Can I use a manufacturer-certified standard in a regulated method?
Commonly, yes, provided the method is validated and the certificate supports the use. It is not equivalent to compendial traceability, and the file should say which one it relies on.
Does Peregrine sell reference standards today?
No. Peregrine sells research-grade bulk isolate with a lot certificate. For a certified standard, buy from an accredited reference-material producer.
Sources
- ISO 17034General requirements for the competence of reference material producers (paywalled)
- ISO/IEC 17025General requirements for the competence of testing and calibration laboratories (paywalled)
- 21 CFR 210.3(b)(7)FDA's definition of an active ingredient
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.
- API grade vs research grade: what actually changesThe molecule is the same. What differs is how much of its history is documented, and who answers for it.
- 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.