How to read a cannabinoid isolate COA

What does a Peregrine COA contain?

Identity and assay for the named cannabinoid, every lot. Identity is HPLC against a qualified reference standard; when a primary standard is on allocation, NMR or LC-MS identity is used and the substitution is disclosed on the certificate rather than implied. Assay is percent w/w. Water-dispersible SKUs report cannabinoid-in-powder — never as if they were isolate.

Residual-solvent panels (ICH Q3C classes as applicable to the process), heavy metals and pesticides ship with the lot pack when requested on the inquiry. Appearance, water activity, storage condition and origin are lot-specific and printed on the COA. Peregrine does not host a public archive of every historical lot; the certificate travels with the material.

How do I verify identity on a COA?

Look for the method and the reference. HPLC identity means retention time and spectrum matched a qualified reference standard of the same cannabinoid. NMR or LC-MS identity means structure or mass was confirmed directly — legitimate, and sometimes necessary for rare isolates such as CBT where standards are scarce, but it should be stated. Be cautious of a COA that reports a purity percentage with no identity line at all: a chromatogram can be 99% of the wrong peak.

For compounds that share a formula — CBC and CBL, for instance — mass alone does not distinguish them. Identity does.

What does assay as % w/w mean?

Grams of the named cannabinoid per 100 g of material as shipped. ≥99.9% CBG isolate means at least 99.9 g of cannabigerol in every 100 g. Formulate from that number, not from the gross mass. On a water-dispersible powder the same line might read 15% w/w CBN — 150 mg CBN per gram of powder — and the rest is carrier.

Which lines matter most for compliance?

The Δ9-THC value and, for acid-form isolates, the neutral partner. Where the production route runs through THC chemistry, as with CBN, the residual THC line is the first thing a brand's compliance team reads. On a CBGa or CBDA COA, the CBG or CBD value shows how much decarboxylation has already occurred — it is a handling record as much as a purity result.

What are residual solvents, heavy metals and pesticide panels?

Residual solvents are process solvents remaining after crystallisation, reported against ICH Q3C class limits. Heavy metals typically cover arsenic, cadmium, lead and mercury. Pesticide panels screen for agricultural residues carried from biomass. All three are lot-level results, requested on the inquiry, and ship with the pack. A supplier who can only offer a spec sheet — target values with no lot — is offering a promise, not a measurement.

What does a COA not tell you?

Anything about efficacy, safety in a finished product, or regulatory status at your destination. It is an analytical record of one lot. Methods and release rules are on the Quality page; claims about what a cannabinoid does are not on this site at all.