Every material we list is independently tested for identity and purity. A result is worth exactly as much as your ability to read it. The purpose of this note is to make the numbers useful to you rather than decorative.
Start with the method, not the number
A purity figure with no method attached is a marketing statement. Area-percent by HPLC is the standard for a reason: it tells you how much of the chromatogram is the named material. A number with no method and no named laboratory behind it describes nothing you can rely on.
A purity figure with no method and no named laboratory behind it is not evidence of anything.
Identity and purity answer different questions
Mass spectrometry answers "is this the molecule you said it was". HPLC answers "how much of this material is that molecule". A result carrying only one of the two has answered half a question, and it is rarely the half that matters to your result.
- A mass figure within tolerance of the expected monoisotopic mass, reported to one decimal place or better.
- A chromatogram, not just a number: a single dominant peak with the integration visible.
- A date of analysis and the name of the laboratory that performed it.
What a purity figure never tells you
It says nothing about how the material was stored between analysis and dispatch, and nothing whatsoever about what the molecule does. The first is answered by our handling standards. The second is not a question we will answer.