This is the certificate of analysis for the current Selank 10 mg batch, tested by Quantum Life Sciences, Portland, ME. Purity is measured by HPLC, identity is confirmed by mass spectrometry and endotoxins are checked by the LAL method. The summary and the full result table are below. The original certificates are shown on the research page.
Selank 10 mg test results
| Certificate number | COA-2026-SLNK-0511 |
|---|---|
| Batch | HEALIO-SLNK-2611 |
| Lot number | SLNK-260623-11 |
| Labeled content | 10 mg |
| Received by lab | 18 June 2026 |
| Analysis date | 23 June 2026 |
| Purity (HPLC) | 99.3% |
| Identity (ESI-MS) | Confirmed, conforms to the reference standard (751.88) |
| Mass found | 10.13 mg (labeled 10 mg) |
| Endotoxins (LAL) | Under 0.5 EU/mg (limit 5 EU/mg) |
| CAS number | 129954-34-3 |
| Formula | C33H57N11O9, 751.88 g/mol |
| Test | Specification | Result |
|---|---|---|
| Appearance | White to off-white lyophilized powder | Confirmed |
| Solubility | Soluble in water | Confirmed |
| Identity (ESI-MS) | Conforms to reference standard (751.88) | Confirmed |
| Purity (HPLC) | 98.0% or higher | 99.3% |
| Peptide content (%N) | 80.0% or higher | 88.9% |
| Water (Karl Fischer) | 8.0% or lower | 4.2% |
| Acetate content | 15.0% or lower | 9.1% |
| Assay | 95.0% to 105.0% | 98.8% |
| Endotoxins (LAL) | 5 EU/mg or lower | Under 0.5 EU/mg |
Purity and quantity by RP-HPLC with UV detection, identity by ESI-MS, endotoxins by LAL (USP <85>). Results relate only to the sample tested.
How to read this Selank certificate
- Purity (HPLC). The share of the powder that is the target compound rather than related substances. A figure close to the top of the range is only meaningful next to a specification, which is why both are shown.
- Identity (ESI-MS). Mass spectrometry weighs the molecule. A match to the reference mass is what shows the vial holds Selank and not something else.
- Mass found against labeled content. The amount measured in the vial next to the amount on the label.
- Endotoxins (LAL). A bacterial contamination marker, reported in EU per mg against a limit.
- Batch and lot. The lot number on your vial is the number printed on the report, so you can check one against the other.
For a longer walk through every line, read how to read a certificate of analysis and peptide purity testing.
Selank research tools
- Selank for salePrice, sizes, shipping and the buy box.
- Selank calculatorConcentration and syringe units from the vial strength. Arithmetic only.
- COA libraryEvery Healio certificate in one place.
- Research and testingHow Healio batches are tested and released.
Selank COA FAQ
What is the Selank COA?
A certificate of analysis is the lab report for one batch of a product. The Selank report, certificate COA-2026-SLNK-0511, was issued by Quantum Life Sciences on 23 June 2026 for batch HEALIO-SLNK-2611, lot SLNK-260623-11.
What purity did the Selank batch test at?
The batch measured 99.3% purity by HPLC. The specification is 98.0% or higher.
How is Selank identity confirmed?
By mass spectrometry (ESI-MS). The result on this certificate is: Confirmed, conforms to the reference standard (751.88). Purity tells you how clean the powder is, and identity tells you it is the compound on the label.
Does this COA cover every Selank size?
This certificate covers the 10 mg vial from batch HEALIO-SLNK-2611. The lot number on a vial ties to its own report, so match the number on your vial to the certificate.
Where can I buy Selank with a COA?
Healio publishes the certificate before you order. Selank is sold for laboratory research use only, from the United States.
Healio Peptides supplies research compounds for laboratory use only. They are not for human or veterinary use.