Read the report, not the label.
A certificate of analysis is a technical document with a narrow scope and real limits. Most people reading one have never been shown what its fields mean, which of them can be quietly omitted, and what the document is silent about by design. This is that reference.
Seeded with reference records — EXAMPLE-A1, EXAMPLE-B2, EXAMPLE-C3 — demonstrating a complete, an incomplete and a self-contradicting report. It does not index the market.
Where certificates are misread
None of what follows implies bad faith on anyone's part. These are structural properties of the measurements — a report can be entirely accurate and still be read to mean something it never claimed.
Separation is not identification
Chromatography tells you how many things are in the vial and in what proportion. It does not tell you what they are. Those are two different measurements, and a report that only carries one is only half a report.
02A number without a method is decoration
“99% pure” means nothing until you know the technique, the detector, the wavelength and the gradient. The same sample yields different figures under different conditions — all of them technically true.
03Purity is not content
A vial can be 98% pure and still be one-fifth water and counterion by mass. Purity describes the fraction of the material that is the target compound; content describes how much of it is actually there.
What a chromatography report is silent about
The single most common reading error is treating a purity certificate as a general statement of quality. It is a statement about one property, measured one way, on one day.
| Property | Why the report does not cover it |
|---|---|
| Sterility | Requires USP <71> or equivalent. Almost never performed on research-grade material. |
| Endotoxin | Requires an LAL assay. Reported separately, in EU/mg, or not at all. |
| Heavy metals | Requires ICP-MS. A chromatography report says nothing about them. |
| Residual solvents | Requires headspace GC. Absent from most certificates. |
| Stability over time | A report describes the sample on the day it was analysed, nothing after. |
Who paid for the test is part of the result
A laboratory owned by, invested in, or wholly dependent on the party being tested is not a third party, whatever the letterhead says. Accreditation covers competence and method integrity — it does not establish independence, and the two are routinely conflated.
What accreditation does establish
ISO/IEC 17025 covers technical competence, method validation, equipment calibration and traceability. It is meaningful and it is verifiable — accreditation bodies publish searchable registers, and a scope certificate names exactly which methods are covered.
What it does not establish
It says nothing about who commissioned the work, who selected the sample, or whether the sample analysed came from the batch that shipped. Sampling provenance is the weakest link in the chain and the least frequently documented.
Nothing is sold on this site
No catalogue, no prices, no checkout, no referrals — and no links to any product, ours included. This reference is published by VERAX Research, which supplies research compounds: a direct commercial interest in the subject, disclosed here rather than buried. What that means for how you read this.