Zerovial does not cut corners on proof. Every batch is independently tested for identity and purity by an ISO 17025 laboratory, and the certificate of analysis is published before it ships.
Zerovial publishes only what an independent body has measured: the accreditation of the testing laboratory, and the per-lot certificates it issues. The artifacts themselves live in the COA library, in full, not summarised.
The global benchmark for the technical competence of a testing and calibration laboratory.
That the lab's analytical methods are validated, its instruments are calibrated against traceable references, and its results are scientifically defensible, verified by an external accreditation body, not self-declared.
It is why a purity figure on a certificate of analysis can be trusted. Anyone can print “99% pure”; an ISO 17025 lab has proven that the measurement itself is accurate and reproducible.
The document set issued for each individual lot: identity and purity measured analytically, with numeric results, the lot identifier, and the testing date.
That the specific lot you receive was tested, not a sample from some earlier production run. The certificate references the lot number printed on the pen, so any unit can be traced back to its own analytical record.
Specification over sensation: the certificate is the product's claim, in numbers, signed by a laboratory that is not us. It is published in the COA library before the lot ships, so the data is available before any order is placed.
Each batch is HPLC-tested for ≥99% purity and ships with an independent certificate of analysis. The standards above are audited; the results below are published per lot.