Quality / Documentation
Quality you can verify.
No trust badges and no unprovable percentages. This page explains how to read analytical data and what to check in the documentation for a specific batch.
RUO / HPLC / MS / COA
Updated: 3 November 2026
Verification
Five steps to a data point.
Quality is not a single measurement. It is a chain from the identity of the compound to the moment you understand what the document actually proves.
- 01
Identify the compound and its form
Check the name, sequence, salt form and pack size. The same name can describe different salts or fragments.
- 02
Find the method
Purity must state the method (e.g. HPLC), wavelength and conditions. A percentage without a method is not a measurable claim.
- 03
Link the document to the batch
The batch number on the vial must match the COA. Without a match, the document cannot be attributed to a specific sample.
- 04
Check the laboratory
Record who performed the analysis, whether the laboratory is independent, and whether the chromatogram and measured masses are attached.
- 05
State the limitation
Every data point tells only part of the story. State what the analysis does not cover and do not infer clinical efficacy or safety.
Analysis
What we measure and what it means.
A data point without a method is not proof. That is why, for every value, it matters how it was obtained and what it refers to.
| Parameter | Method | What it shows |
|---|---|---|
| Purity | HPLC (UV, e.g. 214 nm) | Share of the main peak and presence of impurities. |
| Identity | Mass spectrometry (ESI) | Whether the molecular mass matches the expected compound. |
| Appearance | Visual inspection | Colour, homogeneity and signs of moisture or degradation. |
| Water content | Karl Fischer (product-dependent) | Actual peptide mass per unit of powder. |
| Salt form | Manufacturer specification | Whether it is an acetate, trifluoroacetate or another form. |
The display is illustrative and is not data from a specific batch. For actual values, verify the COA at the source and link it to the batch number.
How to read a COA?
A certificate of analysis is a document about a specific batch. If it does not contain a batch number that matches the label on the vial, it proves nothing about the product you have.
Check the following:
- peptide name, sequence and catalog number;
- batch number and analysis date;
- HPLC method and chromatogram with integration;
- measured and expected mass in MS;
- water content and salt form, if stated;
- laboratory name and responsible person.
A more detailed explanation is in the article How to read a certificate of analysis.
How HPLC works, what mass spectrometry shows and how to read validation is described in the guide to HPLC and mass spectrometry.
What we do not claim
- that every batch has a publicly available COA;
- that the described data have been independently verified;
- that the product is a medicine or treats a disease;
- that use in humans is safe or approved;
- that purity is 100%;
- that analysis replaces clinical trials;
- that Russian origin by itself guarantees better quality.
These limitations are not a responsibility we want to hide. They are part of an honest description of research materials.
Frequently asked questions about quality
Does the site publish certificates of analysis?
What does purity ≥ 99% mean?
Do you perform independent analysis?
How do I verify storage conditions?
Is purity data independently verified?
Documentation
What to check in the documentation.
How to read a COA, chromatogram and MS, and which limitations to consider, is described in the guides. The site does not publish certificates for specific batches.