Last updated: May 2026
Summary: Selank is a synthetic heptapeptide derived from the natural immunomodulator tuftsin. PeptideDropship supplies research-grade Selank to verified B2B partners under strict research-use-only labeling. 99%+ purity verified by HPLC and mass spectrometry, third-party COAs per batch, no MOQ, US 24-hour fulfillment, and white-label options. For research use only — not for human consumption.
Technical specifications
| Parameter | Value |
|---|---|
| Peptide name | Selank |
| Type | Synthetic heptapeptide (tuftsin analog) |
| Sequence | Thr-Lys-Pro-Arg-Pro-Gly-Pro |
| Sequence (1-letter) | TKPRPGP |
| Molecular formula | C₃₃H₅₇N₁₁O₉ |
| Molecular weight | 751.88 g/mol |
| CAS number | 129954-34-3 |
| Form | Lyophilized white powder |
| Standard pack sizes | 5 mg, 10 mg vials |
| Storage | −20°C lyophilized; 2–8°C after reconstitution |
Manufacturing and quality control
Selank is produced via solid-phase peptide synthesis (SPPS) and independently verified by a third-party analytical laboratory before release. Every batch ships with a complete Certificate of Analysis documenting analytical methodology, batch number, manufacture date, and acceptance criteria. Standard QC includes:
- Mass spectrometry for molecular weight confirmation
- Reverse-phase HPLC for purity (99%+ standard)
- Counterion content (typically TFA salt)
- Karl Fischer water content
- LAL endotoxin testing available on request
Wholesale availability
- No minimum order quantity — single-vial wholesale orders supported
- Tiered pricing — per-unit cost decreases with monthly volume
- 24-hour fulfillment from US-based warehouse
- API integration available for automated order routing
White-label and private-label options
Available in three fulfillment models: generic (PeptideDropship branding), white-label (your branding, supplier invisible), and private-label (custom pack sizes or formulation). See the white-label vs. private-label guide.
Packaging, shipping, and storage
Selank ships as lyophilized powder in sealed amber vials with tamper-evident closure. Each shipment includes the batch-specific COA. Shock-protection packaging is standard. Cold-chain shipping is available; lyophilized form is stable at room temperature for short-duration transit.
Compliance and labeling
Selank is supplied to verified B2B partners exclusively for research use under strict research-use-only labeling. Resellers are responsible for maintaining the research-use-only labeling, FDA disclaimer, and compliance with applicable state, local, and international regulations governing research-peptide distribution.
FAQ
What’s the relationship between Selank and tuftsin?
Selank is a synthetic heptapeptide designed as an analog of the natural immunomodulatory peptide tuftsin (Thr-Lys-Pro-Arg). Selank adds three additional amino acids (Pro-Gly-Pro) to extend the half-life relative to native tuftsin.
What pack sizes are available?
Standard pack sizes are 5 mg and 10 mg vials. Custom pack sizes are available through private-label fulfillment.
What’s the standard purity?
99%+ purity verified by HPLC and confirmed by mass spectrometry. The full COA ships with every order.
Are sample COAs available?
Yes. Verified partners can request COAs from recent batches before placing an order.
How is Selank stored?
Lyophilized at −20°C for long-term stability. After reconstitution, store at 2–8°C and use within the documented stability window for the relevant research application.
Get started
Apply for verified partner access — verification takes 1–3 business days. See the peptide dropshipping guide for the business model.
These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any condition. For research purposes only — not for human consumption. PeptideDropship sells research-grade peptides exclusively to verified B2B partners under research-use-only labeling.