ClearCost editorial · Reviewed October 29, 2026
Purity, identity and content are different questions
Understand what a test result measures before comparing products.
On a small screen, swipe the table sideways to read every column.
| Question | What to look for | Do not infer |
|---|---|---|
| Identity | The stated chemical identity and the method used to assess it | That a similar trade name has the same identity |
| Purity | The defined method, result and impurities assessed | That the percentage is the amount in the container |
| Content | An explicit quantity measurement and its units | That the listing label proves a measured amount |
| Other properties | Specific tests relevant to the stated material | Sterility, suitability or clinical safety from a purity percentage |
FDA describes chromatographic, mass-spectrometric and other methods in peptide characterization. Its work concerns regulated drug development and does not validate a ClearCost catalog product.
Sources and limits
Prepared by ClearCost editorial from the sources linked here and the current ClearCost catalog where stated. No independent laboratory or clinical review is claimed. We do not have shipped-lot documents for these listings; a catalog name or price is not product verification.
- FDA: peptide characterization and impurities
- How to read a ClearCost listing
- Current catalog and listed size prices
Reviewed October 29, 2026. Catalog prices can change. Final stock, shipping, tax and order total remain unconfirmed.