WHAT A COA IS
A Certificate of Analysis (COA) is a lab report certifying the chemical composition of a cannabis batch. It's issued by an ISO/IEC 17025-accredited lab, and it's the only source of truth for potency and contamination on any cannabis product.
Every Rosin Royale batch links to its COA via the QR code on the jar lid and via the /coa/[batch] URL on the site.
CANNABINOID PANEL
Lists the concentration of every detected cannabinoid — THCa, Δ9 THC, CBD, CBDa, CBG, CBGa, CBN, etc. Usually in mg/g and percent by dry weight.
The "Total THC" calculation is the one that matters for Farm Bill compliance.
TERPENE PANEL
Lists each terpene by weight-percent. Labs scan 30–45 different terpenes. Anything above 0.5% is a "dominant" terpene and drives the aroma profile.
Terpene total for high-quality flower/rosin is 2.5–4.5%. Anything above 3.5% is exceptional.
SAFETY PANELS
Pesticides: 60+ compound panel, limits in ppb. All results should be ND (Not Detected).
Residual solvents: 21+ compounds. Solventless rosin should always be ND across the board.
Heavy metals: Arsenic, lead, mercury, cadmium. Limits in µg/kg.
Microbials: E. coli, salmonella, yeast, mold. Plating counts.
Mycotoxins: Aflatoxins + ochratoxin. Limits in ppb.
Any panel with a non-ND result above the action limit is a fail — the batch is recalled.
