Selank
Batch SL418933 · Tested April 18, 20265mg
MW: 751.87 Da · CAS: 129954-34-3
Independent laboratory testing confirms purity, composition, and endotoxin safety per USP ‹85› standards. Results apply only to this specific batch, for research use only.
Available Dosages
This product is available in 2 dosage options. Each batch is independently tested.
Sample Summary
Identification and intake details for this tested batch.
Sequence
Thr-Lys-Pro-Arg-Pro-Gly-Pro
Purity Analysis
HPLC-UV
What this test measures
High-performance liquid chromatography with UV detection separates the peptide from related impurities and quantifies each fraction. Mass spectrometry confirms molecular identity by measuring the exact mass-to-charge ratio.
Endotoxin Analysis
Limulus Amebocyte Lysate assay in accordance with USP ‹85›
What this test measures
The LAL assay detects bacterial endotoxin at the reporting threshold shown. Both replicates must be below the threshold established by USP Chapter ‹85› to clear. For research-grade material handling only.
Safety & Contaminants
Heavy metals screening per ICH Q3D, sterility, and microbial limits testing.
Heavy Metals (ICH Q3D)
| Element | Symbol | Result | Limit | Status |
|---|---|---|---|---|
| Arsenic | As | <0.2 ppm | ≤1.5 ppm | Pass |
| Cadmium | Cd | <0.19 ppm | ≤0.5 ppm | Pass |
| Lead | Pb | <0.4 ppm | ≤0.5 ppm | Pass |
| Mercury | Hg | <0.03 ppm | ≤0.3 ppm | Pass |
| Chromium | Cr | <0.6 ppm | ≤1.1 ppm | Pass |
Sterility Testing
| Test | Method | Result | Status |
|---|---|---|---|
| Bacterial Endotoxin (LAL) | USP <85> Kinetic Turbidimetric | < 0.05 EU/mg | Pass |
| Bioburden | USP <61> Membrane Filtration | < 1 CFU/mL | Pass |
| Sterility (14-day) | USP <71> Direct Inoculation | No Growth Detected | Pass |
Microbial Limits (USP ‹61›/‹62›)
| Organism | Result | Limit | Status |
|---|---|---|---|
| Total Aerobic Microbial Count (TAMC) | < 10 CFU/g | ≤100 CFU/g | Pass |
| Total Yeast & Mold Count (TYMC) | < 10 CFU/g | ≤10 CFU/g | Pass |
| E. coli | Not Detected | Absent | Pass |
| Salmonella | Not Detected | Absent | Pass |
| S. aureus | Not Detected | Absent | Pass |
| P. aeruginosa | Not Detected | Absent | Pass |
Amino Acid Composition
Observed vs. expected residue ratios confirming sequence integrity.
| Residue | Expected | Observed | Deviation |
|---|---|---|---|
| Gly | 3.3 | 3.3 | ±0.00 |
| Pro | 3.8 | 3.8 | ±0.00 |
| Val | 3.9 | 4.0 | ±0.10 |
| Asp | 1.2 | 1.1 | ±0.10 |
| Leu | 1.4 | 1.4 | ±0.00 |
| Ser | 3.6 | 3.6 | ±0.00 |
| Arg | 2.9 | 3.0 | ±0.10 |
| Ala | 2.0 | 2.1 | ±0.10 |
Stability Profile
Accelerated and long-term stability data across storage conditions.
Storage Recommendation
Store lyophilized material at -20°C for maximum shelf life (24 months from manufacture). Reconstituted solutions should be aliquoted and stored per the conditions table below.
Storage & Handling
Recommended storage conditions for lyophilized and reconstituted material.
| Condition | Temperature | Duration | Notes |
|---|---|---|---|
| Long-term Storage | -20°C ± 5°C | 24 months | Store lyophilized in original sealed vial |
| Refrigerated | 2–8°C | 6 months | Protect from light; keep desiccated |
| Reconstituted (BAW) | 2–8°C | 14 days | Use bacteriostatic water; aliquot to avoid freeze-thaw |
| Reconstituted (Sterile Water) | -20°C | 30 days | Flash-freeze aliquots; single-use recommended |
Full Certificate PDF
Signed laboratory-issued PDF with chromatogram and mass confirmation plots.
Test History for Selank
8 independent lab tests on file for this product.
| Purity | Batch | Date | Type | |
|---|---|---|---|---|
| 99.31% | Batch 8234· 5mg | Dec 22, 2025 | Purity | Current |
| 97.36% | Batch 9580· 10mg | Nov 5, 2025 | Purity | |
| 99.22% | Batch 9186· 5mg | Oct 4, 2025 | Purity | |
| 97.69% | Batch 8977· 25mg | Sep 18, 2025 | Purity | |
| 98.49% | Batch 8475· 25mg | Aug 19, 2025 | Purity | |
| 98.95% | Batch 8195· 10mg | Jul 19, 2025 | Purity | |
| 98.06% | Batch 9545· 5mg | Jun 22, 2025 | Purity | |
| 99.25% | Batch 9976· 5mg | May 25, 2025 | Purity |
Frequently Asked Questions
Quick reference for what each test means.
Research Use Only
The peptides tested are intended for research use only and are not approved for human or veterinary use, diagnostics, therapeutic, or clinical applications. Results apply only to the specific sample provided and should be interpreted by qualified professionals within the scope of the intended research.