Quality, Testing & Certificates of Analysis
How 4K Peptides verifies identity and purity — and how to read the batch documentation behind every product.
Our testing approach
Research is only as reliable as the material it starts with. Every batch we supply is intended to be accompanied by independent, third-party analytical testing so that a researcher can confirm what is in the vial before it is ever used. Two measurements matter most:
| Test | What it confirms |
|---|---|
| HPLC (High-Performance Liquid Chromatography) | Purity — the percentage of the sample that is the target peptide versus impurities. |
| MS (Mass Spectrometry) | Identity — that the molecule present is actually the compound it is labelled as, by molecular weight. |
Together, HPLC and MS answer the two questions that matter to any research buyer: is it the right compound, and how pure is it?
Batch traceability
Each product carries a lot / batch number that maps to its own certificate of analysis. That means the documentation describes the exact material you receive — not a generic or historical claim. Reorder the same specification and you can compare batch to batch.
How to read a Certificate of Analysis (COA)
- Compound & batch/lot number — identifies the exact material tested.
- Purity (HPLC) — expressed as a percentage; the chromatogram shows the main peak and any impurities.
- Identity (MS) — the measured molecular mass, compared against the compound's theoretical mass.
- Testing laboratory & date — who performed the analysis and when.
COA library
Per-batch certificates are published here as they are issued. Certificates are provided by an independent analytical laboratory and correspond to the batch numbers on the products they cover.
Requesting a COA: if the certificate for a specific batch is not yet listed, request it by emailing orders@4k-health-beauty.com with the product and lot number, and we will provide the corresponding report.
| Compound | Batch / Lot | Purity (HPLC) | Identity (MS) | Certificate |
|---|---|---|---|---|
| Batch certificates are added here as each lot is tested and released. Contact us for the COA covering any current stock. | ||||
Safety documentation (SDS)
Safety Data Sheets describing handling, storage and disposal for research materials are available on request for the compounds we supply. Email orders@4k-health-beauty.com with the compound name.
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