Home / Tests / Selank

Selank testing in Canada

At 752 daltons, Selank is among the smallest compounds we test. The smaller the peptide, the larger the share of the vial that is salt and water rather than the thing you paid for.

$249CAD

Results in about five business days from arrival

Order this test
  • Identity by LC–MS/MS
  • Purity, with the method stated
  • Net peptide content in mg
  • Chromatographic peak data
  • Certificate anyone can verify

A tuftsin analogue with a proline tail

A seven-residue analogue of tuftsin, extended with a Pro-Gly-Pro tail. Like Semax, it was developed in Russia and has no approved form in Canada or the United States.

Residues
7
Formula
C33H57N11O9
Mol. weight
751.9 Da
Also called
TP-7

What you are actually weighing

Counterion load

Selank carries multiple basic residues, and each one pairs with a counterion during purification. On a molecule this small, the counterion mass is a significant proportion of the total. Net peptide content is the figure that captures this; purity is not.

This is why we report the two separately on every certificate rather than folding them into a single reassuring number.

The acetylated variant

N-acetyl-Selank exists, weighs 42 daltons more, and is sold under the same name. Both are legitimate compounds. Only one is what you ordered.

Nothing to compare against

No pharmacopoeial monograph exists for Selank in North America, so there is no official specification defining what an acceptable sample looks like. The measured numbers are the whole picture.

What your certificate reports

  1. Identity — confirmed from precursor-to-product-ion transitions on a triple quadrupole instrument, not inferred from retention time.
  2. Purity — measured at the quantifying transition, with the method named on the report.
  3. Net peptide content — quantified against an external calibration curve and reported as its own figure, in milligrams. Why this is a different number from purity.
  4. Peak data — the chromatographic results behind each figure, printed on the certificate rather than held back.

Common questions

How much sample do you need?

One unopened vial. Detailed posting instructions arrive with your order confirmation, immediately after you pay.

Does it need to be shipped cold?

No. Lyophilised peptides travel safely at room temperature, which is how nearly all samples reach us.

Who actually performs the analysis?

An independent Ontario laboratory. Every certificate we issue names the facility that ran it — we are a testing service, not a laboratory, and we would rather say so than let you find out from the report.

What if the result comes back bad?

You get the result. We do not soften findings, and we do not charge differently depending on what the analysis shows.

Can I verify the certificate is genuine?

Yes. Every certificate carries an identifier that anyone can check against our records, including the vendor you bought from.

Related reading

ExplainedPurity is not contentA vial can be 99% pure and hold a quarter less peptide than the label says.Related testSemax testingThe other short Russian nootropic, with the same counterion issue.ExplainedHow labs know what is in a vialMass spectrometry without the jargon, and why weighing beats timing.

Test your selank

$249 CAD · about five business days from arrival · never leaves Canada

Order this test