Lab testing
Eight assays. Every lot.
North Wall releases a lot only after an ISO/IEC 17025 accredited third-party laboratory confirms purity, identity, content, and safety screens. If a batch misses the 99% standard, it does not ship.
8assays per lot
99.0%purity release standard
ISO 17025accredited labs
1 scanvial QR to lot COA
The release panel
| Assay | Method | Release criterion |
|---|---|---|
| Purity | HPLC-UV | ≥ 99.0% |
| Net peptide content | Quantitative HPLC | ≥ 100% of label |
| Identity | LC-MS | Matches theoretical mass |
| Appearance | Visual | White lyophilized cake |
| Fentanyl screen | LC-MS/MS | Not detected |
| Heavy metals | ICP-MS | Within specification |
| Sterility | PCR | Not detected |
| Endotoxin | LAL | Within specification |
Why both purity and identity
HPLC shows how much of a sample is a single species. LC-MS confirms that the species is the intended sequence. North Wall reports both. Read the guide.
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