Research use only ✓ COA Selank
Neuropeptides

Selank TP-7

CAS 129954-34-3 BATCH ACE-2779576

Selank is a synthetic heptapeptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP): the immunopeptide tuftsin with a Pro-Gly-Pro tail for stability. This Selank peptide is a 10 mg lyophilised vial with a per-lot ILS Laboratories certificate.

Original price was: $84.00.Current price is: $58.80.
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Verified test results

Every batch, independently verified.

Each batch is analyzed by an ISO/IEC 17025 accredited third-party laboratory before it ships. This is the released report for the size selected above, exactly as the lab signed it.

ILS LaboratoriesIndependent, ISO/IEC 17025 accredited

Certificate of analysis

99.90%

Purity by HPLC

Lot
ACE-2779576
Tested
Sep 3, 2026
Labeled
10mg
Measured
10.4mg
ISO 17025 accredited7× tested

Full QC panel

5 passed · 2 reported

Purity

HPLC

99.90%Pass

Net Peptide Content

10.4mgReported

Identity

HPLC

SelankPass

Fentanyl Screen

Not DetectedPass

Heavy Metals

ICP-MS

Not DetectedPass

Sterility

PCR

No GrowthPass

Endotoxin

USP <85>

0.101 EU/mLReported

What is Selank?

Selank was designed at the Institute of Molecular Genetics of the Russian Academy of Sciences, with the V.V. Zakusov Research Institute of Pharmacology. Its first four residues, Thr-Lys-Pro-Arg, are tuftsin, a short fragment of the immunoglobulin G heavy chain. The C-terminal Pro-Gly-Pro (a “glyproline”) was added to slow enzymatic breakdown and prolong its action.

The same stabilising tail is used in Semax, which pairs it with a fragment of ACTH instead of tuftsin. For a side-by-side view of the two, see Selank vs Semax.

Selank identity

Names Selank, TP-7, Selanc
Sequence TKPRPGP (H-Thr-Lys-Pro-Arg-Pro-Gly-Pro-OH)
Structure Linear heptapeptide, all L-amino acids, free termini
Molecular formula C33H57N11O9 (free peptide)
Molecular weight 751.9 g/mol (free peptide)
CAS number 129954-34-3
PubChem CID 11765600
Parent peptide Tuftsin (Thr-Lys-Pro-Arg)
This product 10 mg, lyophilised powder

Research material is often supplied as a salt (for example the acetate), so its formula weight can differ from the free peptide’s. Source: PubChem CID 11765600.

Certificate for the current lot

The current Selank lot was analysed by ILS Laboratories in San Diego, which states ISO/IEC 17025 accreditation for activities within its published scope:

SizeLotLaboratoryAnalysedHPLC purityMeasured contentIdentity
10mg
ACE-2779576
ILS Laboratories
3 Sep 2026
99.90%
10.4mg
Selank

Transcribed from the certificate issued for each size on sale today. Open the signed certificate for any size under Verified test results above. Every Selank COA, lot by lot

How Selank has been studied

No single receptor for Selank has been identified. The mechanisms proposed in the literature are:

Clinical work on Selank comes almost entirely from Russia and is mostly published in Russian. Two comparative studies, in 62 and 60 patients, compared it with the benzodiazepines medazepam and phenazepam using standard anxiety rating scales. Zozulia AA, et al., 2008; Medvedev VE, et al., 2014. Zhurnal Nevrologii i Psikhiatrii. ClinicalTrials.gov lists no Selank studies.

Regulatory status

A 2022 review lists Selank among the peptide products registered in the Russian Federation. In the US it is not an approved drug, and FDA’s page on bulk substances that may present significant safety risks in compounding lists “Selank acetate (TP-7)” among nominated-but-withdrawn substances, noting limited human safety information. Development of Peptide Biopharmaceuticals in Russia. Deigin VI, et al. Pharmaceutics, 2022; FDA compounding safety-risk list. Clean Peptide’s Selank is a laboratory reference material only.

Related research

Technical specification

What is on file, and how it is handled

Every figure below is transcribed from the paperwork for this compound.

Material

Compound
Selank
Class
Tuftsin analogue (glyproline heptapeptide)
Form
Lyophilised powder
Sizes
10mg
Sequence
TKPRPGP (H-Thr-Lys-Pro-Arg-Pro-Gly-Pro-OH)
Formula
C33H57N11O9
CAS
129954-34-3
Mol. weight
751.9 g/mol
Residues
7

Verification

Identity
Confirmed on the certificate of analysis
Purity
≥ 99.9% by HPLC
Batch
ACE-2779576
Documentation
Per-batch certificate of analysis

Handling

Storage
Store at −20 °C, protected from light
Intended use
In-vitro laboratory research only
Compound data on PubChem

QuestionsSelank: frequently asked

What is Selank?+

Selank is a synthetic heptapeptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro. It is tuftsin (Thr-Lys-Pro-Arg) extended by a Pro-Gly-Pro tail, developed at the Institute of Molecular Genetics, Russian Academy of Sciences.

What is the Selank peptide sequence?+

TKPRPGP, or H-Thr-Lys-Pro-Arg-Pro-Gly-Pro-OH. The formula of the free peptide is C33H57N11O9 (751.9 g/mol), CAS 129954-34-3.

What is the difference between Selank and Semax?+

Both end in the same Pro-Gly-Pro stabilising unit. Selank starts with tuftsin (Thr-Lys-Pro-Arg); Semax starts with the ACTH(4-7) fragment (Met-Glu-His-Phe).

What is the difference between Selank and Selank Spray?+

Same peptide, different form. This product is 10 mg of lyophilised powder in a vial; Selank Spray is 20 mg already in a 20 mL solution.

Is Selank FDA-approved?+

No. It is reported as registered in Russia. FDA lists Selank acetate among bulk substances nominated, then withdrawn, from its compounding safety-risk category.

What does the Selank certificate show?+

The current 10 mg lot, ACE-2779576, was analysed by ILS Laboratories on 3 September 2026: 99.90% HPLC purity, 10.4 mg net peptide content and identity confirmed as Selank.

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