Per vial, USD
| Fill weight | 100+ | 1,000+ | 2,500+ | Order |
|---|---|---|---|---|
| 10 mg | $14.30 | $12.01 | $11.73 |
Ordering at volume
A thousand vials of Selank is a stock question more than a chemistry one. The chain is short and water-loving, and nothing about the molecule itself puts a queue in front of an order. It is stocked in California as a standard-catalog line, so a stocked quantity ships on the normal weekday schedule and anything larger is dated on the written quote.
Because there is a single fill, the tier arithmetic is unambiguous: the number of Selank vials on the order is the number that decides the rate for Selank, and other compounds on the same paperwork neither help it nor hold it back. Buyers who take several of the short peptides together generally keep them on one order for freight and one set of documents while letting each line find its own break.
Small peptides ship dense. A thousand vials of this is a light consignment rather than a freight problem, so the practical constraint at volume is usually freezer space at your end, not transport. Check the vials per kit against the carton count on the packing list when a first shipment lands, and match the lot printed on the vial to the certificate rather than to the invoice.
Specification
- Compound
- Selank
- CAS number
- 129954-34-3
- Formula
- C₃₄H₅₇N₁₁O₉
- Molecular weight
- 751.9 g/mol
- PubChem CID
- 56841944
- Form
- Lyophilized powder, sealed vial
- Fill weights
- 10 mg
- Stock depth
- Standard catalog — Stocked in California. Each compound reaches its own tier break.
- Intended use
- Laboratory research only. Not for human or veterinary use.
What the material is
Selank is a short synthetic peptide seven residues long: threonine, lysine, proline and arginine, then proline, glycine and proline. Two of those side chains are basic and one carries a hydroxyl, which makes the molecule strongly hydrophilic and explains why it goes into aqueous buffer without argument. At 751.9 g/mol it carries no lipid chain, no ring closure and no metal — structurally it is a plain linear chain and nothing more.
Vials contain a white lyophilized powder behind a butyl closure and a crimped aluminium collar. Small basic peptides draw water out of room air, so this one is treated as hygroscopic once the seal is broken: the stopper goes back rather than the vial standing open on a bench while a quantity is measured out. None of that applies to unopened stock, where the closure does the work; the caution begins the moment a crimp is lifted.
Storage and reconstitution
Freezer storage at −20 °C suits sealed stock, kept dry and dark; a refrigerator will do for the short term when the freezer is full. Bring a vial up to room temperature before breaking the seal, because a cold surface opened into humid air collects condensation and this powder takes that water up quickly.
It dissolves as fast and as completely as anything in the catalog, whether into an assay-appropriate aqueous buffer or into plain sterile water, quickly, with a gentle swirl. Hold the solution cold and out of the light afterwards, and divide it before freezing if more than one draw is planned — repeated freeze-thaw cycles are what degrade a dissolved short peptide in practice, far more than time in a cold room does.
Buying questions
How quickly does Selank go into solution?
Fast, and completely. Two basic side chains and no lipid make it among the most soluble items here, and an aqueous buffer takes it up quickly. Anything still visible after a swirl is worth reporting rather than working around.
Is Selank hygroscopic enough to matter in a humid warehouse?
Only once a vial is open. Sealed stock is unaffected, since the stopper and crimp are the barrier that counts, but exposed powder pulls water from room air within minutes. Keeping unopened vials in the freezer and warming them before opening removes the problem entirely.
What sets the lead time on a large Selank order?
Stock, not synthesis. It is held in California as standard-catalog stock, so a stocked quantity ships on the normal weekday schedule; an order beyond the shelf gets its date from the written quote rather than from an average that would be wrong most weeks.
Can Selank sit on the same purchase order as other compounds?
Yes, and most orders are mixed. Every line is priced on its own quantity, so putting Selank beside four other compounds gives you one shipment, one set of documents and five independent tier calculations. The mechanics of a mixed line are in how to order.
