Selank wholesale
Bulk peptide powder in 10-vial kits, for sale in the USA and abroad: price and cost per mg
About Selank
Heptapeptide, tuftsin analogue, TKPRPGP. 2 vial strengths, 5mg to 10mg, from $45.40 to $73.96 per box of ten, in US dollars. 1 strength is on the shelf, leaving in 1 to 2 business days; the other is on order, shipping in 2 weeks.
Documents Specification sheet Verify a batch How to read the certificate What the purity figure means The mass result, explained
Selank price per box, per vial and per mg
| Code | Strength | Per box | Per vial | Per mg | Stock | Order |
|---|---|---|---|---|---|---|
| SK5 | 5mg x 10 vials | $45.40 | $4.54 | $0.908 per mg | Low stock | |
| SK10 | 10mg x 10 vials | $73.96 | $7.40 | Lowest $0.740 per mg | Ships in 2 weeks |
On the shelf, leaving in 1 to 2 business days: SK5. The others are on order, shipping in 2 weeks.
Ships from the USA: to US addresses at our risk until delivered (DAP), freight included from $1,000 of goods; to Canada and most other countries through the desk · on-shelf lines leave in 1 to 2 business days, then 1 to 3 business days in US transit · COA per batch · proforma in USD, paid by card, Wise, e-Transfer (Canada), Bitcoin or USDT · prices revised
Stock key
- In stock
- on the shelf, leaves in 1 to 2 business days once payment clears
- Low stock
- on the shelf and running low; leaves in 1 to 2 business days
- Ships in 1 week
- on its way in
- Ships in 2 weeks
- on order
- Made to order, 4 weeks
- made for the order, about four weeks
- Special order, 50-box minimum
- brought in on a 50-box minimum rather than held in stock; the desk confirms the date before you pay
Prices are in US dollars per sealed box. Per unit is the box price over the milligrams, millilitres or units in the box.
Selank in brief
Selank comes in 2 strengths from 5mg to 10mg per vial, each a sealed box of ten, from $45.40 to $73.96 a box. Per mg the spread is narrow: SK10 (10mg x 10 vials) works out at $0.740 per mg against $0.908 per mg for SK5 (5mg x 10 vials), 19 percent less for the same mg, because the vial, the fill and the testing cost about the same whatever the vial holds.
One of the 2 strengths is on the shelf today (SK5) and leaves in 1 to 2 business days after payment clears; SK5 is running low. SK10 is on order and ships in 2 weeks.
What Selank is
Selank is a synthetic heptapeptide, TKPRPGP, average mass 751.9, built from the tetrapeptide tuftsin (TKPR) extended by Pro-Gly-Pro at the C-terminus, the same tripeptide tail Semax carries. It has three prolines in seven residues, at 3, 5 and 7, which gives it a rigid backbone. PE-22-28, Gly-Val-Ser-Trp-Gly-Leu-Arg at 773.9, is a third heptapeptide in the range, and the only one of the three with a tryptophan.
There is no methionine, cysteine, tryptophan, asparagine or glutamine in it, so oxidised and deamidated forms are not the impurities to expect; its related substances are synthesis deletions. It is hydrophilic and basic, its lysine and arginine against no acidic residue, and dissolves instantly.
Registry and identity
- FDA's GSRS knows selank also as Selanc and TP 7, under UNII TS9JR8EP1G (CAS 129954-34-3, PubChem CID 11765600). FDA GSRS
- As selank diacetate (UNII Q94Z9E92UU), two acetic acid molecules bring the formula weight to 872.0, so acetate is 13.8 percent of a diacetate's weight. FDA GSRS, PubChem
- Do not confuse it with N-acetyl selank, UNII J3PM702O93, a compound with a record of its own, at 793.9. FDA GSRS, PubChem
- With lysine and arginine both able to carry a proton, selank's doubly charged ion at m/z 376.724 can be read alongside the singly charged 752.441 (monoisotopic mass 751.434). PubChem
A listing in these registers identifies a substance; it is not an approval of this line.
Selank beside Semax and Adamax
Selank works out at $0.740 per mg at 10mg (SK10), its lowest by the single box. Its neighbours: Semax at $0.740 per mg at 10mg (XA10), 813.9 g/mol, set side by side in Semax vs Selank, the ACTH (4-7) core Met-Glu-His-Phe ahead of the same Pro-Gly-Pro, holding the one sulfur of the pair in a methionine that oxidises; Adamax at $1.156 per mg at 10mg (ADA10), an adamantane-bearing analogue of Semax, from the ACTH (4-10) family rather than tuftsin’s.
Reading a Selank certificate of analysis (COA)
Identity by mass. Average mass 751.9 (C33H57N11O9). In electrospray the protonated ions come near m/z 752.9 (singly charged); on our certificates the measured mass is matched to the calculated average mass, within about one unit.
- Oxidation: no methionine, tryptophan or cysteine in the chain, so oxidised forms are not the impurity to expect.
- Deamidation: no asparagine or glutamine, so the +1 mass deamidation impurity common in longer peptides does not apply.
- Charge: near neutral pH about +2, basic.
Worked out from what the sheet holds for this line; the batch certificate is the record. How to read one, and verify a batch number.
Buy Selank in bulk
Selank is sold in bulk by the sealed box of ten vials, and every account starts at list price. Two discounts can lower it, the size of one order (from $5,000 of goods) or the account’s tier (from lifetime paid spend), and the better one applies, never both. Priced below on SK10, 10mg x 10 vials, the best-priced strength.
| Discount | Earned by | Off goods | SK10 per box | Per mg |
|---|---|---|---|---|
| List | Every account, any order | none | $73.96 | $0.740 |
| Order size | $5,000 of goods in one order | 5% | $70.26 | $0.703 |
| Order size | $10,000 of goods in one order | 10% | $66.56 | $0.666 |
| Order size | $20,000 of goods in one order | 15% | $62.87 | $0.629 |
| Order size | $50,000 of goods in one order | 20% | $59.17 | $0.592 |
| Silver tier | $5,000 lifetime paid spend | 3% | $71.74 | $0.717 |
| Gold tier | $15,000 lifetime paid spend | 6% | $69.52 | $0.695 |
| Platinum tier | $50,000 lifetime paid spend | 10% | $66.56 | $0.666 |
| Diamond tier | $100,000 lifetime paid spend | 15% | $62.87 | $0.629 |
Thresholds in USD on goods, before freight; the discount is worked out at checkout and shown on the proforma.
Specification
The limits this compound is supplied to.
| Purity | ≥ 98.0 % (RP-HPLC, 220 nm, area normalisation) |
|---|---|
| Identity | ESI-MS against a calculated average mass of 751.9 |
| Any single related substance | ≤ 1.0 % |
| Water | ≤ 8.0 % (Karl Fischer) |
| Acetate | ≤ 15.0 % (ion chromatography), as the acetate salt |
| Residual solvents | Acetonitrile ≤ 410 ppm; TFA ≤ 1.0 % |
| Net content | Label claim ± 5 % |
| Closure | 2 mL glass vial, bromobutyl stopper, aluminium flip-off seal |
| Storage | −20 °C, dark and dry; brief ambient transit tolerated |
| Shelf life | 24 months from manufacture; retest date on the batch record |
Order Selank
One box of SK5, 5mg x 10 vials, $45.40 a box. Every strength.
Questions about Selank
Why is selank basic where semax is acidic?
Selank’s first four residues are tuftsin, Thr-Lys-Pro-Arg, so it carries a lysine and an arginine and no acidic residue at all, which puts it near +2 at neutral pH. Semax opens instead on Met-Glu-His-Phe, whose glutamate leaves it near -1. Their shared Pro-Gly-Pro tail has no charged side chain, so the whole difference lies in those first four residues.
How much does Selank cost?
From $45.40 a sealed box of 10 vials, up to $73.96 for the largest strength sold singly, which works out at $0.740 per mg at its best-priced size. To a US address, freight is included from $1,000 of goods; below that it is the carrier’s rate for the carton or a flat $35.00, and to another country the desk quotes it; either way the figure is on the proforma before you pay. Every strength and its price per vial is in this page’s price table.
Which Selank size is cheapest per mg?
SK10, 10mg x 10 vials, at $0.740 per mg, which is 19 percent less per mg than SK5, at $0.908 per mg. Larger vials cost less per mg across this range, so match the vial to the size of the work first, then compare per mg.
Can I buy a single vial of Selank?
No. One sealed box of ten vials is the smallest quantity of a regular line; for Selank that is SK5, 5mg x 10 vials, at $45.40. A first order must reach $100 of goods, so SK5 alone takes three boxes ($136.20) or one box beside other lines. A box is sealed at fill with its batch number on it, and splitting one would break the link between the vials and their certificate.
Which Selank strengths are in stock today?
SK5 at $45.40 a box (running low). SK10 is on order and ships in 2 weeks.
How is Selank stored?
At minus 20 degrees Celsius, dark and dry. Lyophilised powder tolerates a short spell at ambient temperature in transit, which is why boxes ship without ice. Storage and handling.
What is in a box of Selank?
Ten sealed vials of one strength, each labelled with the product code, the strength and the batch number; the trade also calls a box a 10-vial kit. Selank is supplied as a powder in a sealed glass vial and in no other presentation. Boxes are not split.
Is a certificate of analysis (COA) provided for Selank?
Yes. For Selank the batch certificate reports its purity, net content and identity by mass spectrometry. The other lines on this page are the specification it is made to, and the desk answers for them on a particular batch. The certificate is sent with the shipment, and again on request, and any batch number can be verified on the certificate page.
Is this for human use?
No. Everything here is supplied for laboratory research only, to trade accounts, and is not for human or animal consumption. The research-use page sets out who can buy and what is not sold.