209PEPS
← Back to catalog
Lot 2026 · 17 MAR 2026 Third-party tested209-SLK
99.79%Purity · HPLC
ON FILEIdentity
<0.21%Total impurity
Cognitive · 209-SELANK-10In stock

209-SLK

4.5 · 4 reviews
99.79%Purity
10mgDose / vial

Selank, a synthetic tuftsin analog studied in anxiolytic and neuropeptide research models. Supplied lyophilized for laboratory research.

$69.99
Third-party tested HPLC 99.79%+ Ships from California Discreet packaging
Pack
$199.00 away from free shipping

In stock — ships same or next business day

Don’t forget

You’ll need bacteriostatic water to reconstitute lyophilized peptides.

209-BAC Water · $9.99

For laboratory research use only. Not for human or veterinary consumption. Handle in accordance with good laboratory practice.

01 / Specimen data

Selank

A synthetic heptapeptide analog of the endogenous tetrapeptide tuftsin, studied as a research reference peptide.

Research reference vial, macro detail
Catalog no.209-SELANK-10
CAS129954-34-3
SequenceThr-Lys-Pro-Arg-Pro-Gly-Pro
Molecular formulaC33H57N11O9
Molecular weight751.90 g/mol
Quantity / vial10mg
Physical formLyophilized powder
SolubilityReconstitute with bacteriostatic water; soluble in sterile water
StorageLyophilized: store at −20 °C, protect from light. Reconstituted: 2–8 °C, use within weeks.
Certificate of analysis on the bench beside a reference vial

02 / The assay

It names your lot.

Every batch is third-party tested and named by its lot number — the same lot printed on the vial in your hand. This vial ships from lot 2026, tested by Janoshik Analytical.

99.79%Purity by HPLC
ON FILEMass spec identity
<0.21%Total impurity
Lot · 2026Issued · 17 MAR 2026Lab · Janoshik AnalyticalReport · 121837
View certificates of analysis

Quality

Released by the lot.
Never by the batch average.

A batch average hides the outliers. We publish the number for the lot you actually receive — matched to the code on your vial — so the paperwork describes your material, not a favourable mean across a production run.

03/ Protocol & terms

Handling

Store lyophilized vials at −20 °C, protected from light. Reconstitute with bacteriostatic water and keep the solution refrigerated at 2–8 °C.

Dispatch

Orders placed before the daily cutoff ship same or next business day, discreetly packaged. Tracking is emailed on dispatch.

Guarantee

Every lot ships with third-party analytics. If a vial arrives damaged or a lot fails to match its COA, we replace it — see our refunds policy.

Reviews

4.5 · 4 reviews
  • Cassius NwosuJul 12, 10:44 PM

    Purity is legit. The 209-SLK dissolved fully with zero cloudiness, and the paperwork was actually in the box.

  • reflux_rowanMay 11, 6:33 PM

    Reliable 209-SLK. Fourth order, still consistent. Small nitpick: outer box arrived a little dented, contents fine.

  • Ingrid SolheimApr 23, 7:25 PM

    No complaints on quality. Reconstituted clean, no particulates. Turnaround was reasonable.

  • Dr. Wren AdeyemiMar 10, 12:38 AM

    COA matched the vial to the decimal — HPLC trace was clean, no shoulder peaks. Reconstituted crystal clear in bac water. Reordering.

Leave a review

Reviews are public and reflect customer opinions, not medical or research claims. For laboratory research use only.

Questions

What exactly am I purchasing?

209-SLK is supplied strictly as a reference material for in-vitro and laboratory research. It is not a drug, supplement, or medical product, and nothing on this page describes human or veterinary use.

How should this be stored and reconstituted?

Store the lyophilized vial at −20 °C away from light. For research reconstitution, bacteriostatic water is the standard diluent; keep the reconstituted solution refrigerated at 2–8 °C.

Is this material third-party tested?

Yes. Batches are analysed by an independent laboratory. The lot number on your vial matches the certificate of analysis published on our COA index, so you can verify the exact material you received.

How is my order shipped?

Orders placed before the daily cutoff ship same or next business day in discreet packaging. A tracking number is emailed to you when the parcel is dispatched.

What is your return policy?

If a vial arrives damaged, or a lot does not match its certificate of analysis, contact us for a replacement. Full terms are on our refunds page.

Ordered alongside