COA
Certificate of Analysis: the testing lab's report on one batch, covering potency, terpenes and the safety tests. Some labels link to it with a QR code; some only print the lot number.
Related terms
- Batch
One production run of a product, sampled and tested together. Every package from a batch shares one lab sheet. - Lot
The number that ties a package to its batch and its test results. States and brands use lot and batch loosely; the lot number on your label is the one to write down. - Testing lab
The independent, state-licensed lab that sampled the batch and ran the tests. Its name, licence number and the date of testing are on the sheet. - Potency
The cannabinoid section of a lab sheet: how much THCa, THC, CBD and the rest the sample carried by weight. It measures what is in the sample and nothing else.