Selank - Front - MiPeptidos
Cognitive / Neuropeptides

Selank

CAS: 129954-34-3

Selank is a research peptide in the cognitive / neuropeptides category. Selank is a synthetic heptapeptide derived from the immunomodulatory peptide tuftsin (Thr-Lys-Pro-Arg) with a C-terminal Pro-Gly-Pro extension that enhances metabolic stability. MiPeptidos offers Selank in 2 sizes with 99.5% verified purity and full analytical documentation.

Starting at
$16.95/vial
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≥99% Purity
COA Included
Third-Party Tested
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CoA Included
HPLC Verified
GMP Compliant
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How Selank Works

Selank is a synthetic heptapeptide derived from the immunomodulatory peptide tuftsin (Thr-Lys-Pro-Arg) with a C-terminal Pro-Gly-Pro extension that enhances metabolic stability. It modulates the balance of Th1/Th2 cytokines, influences enkephalinase activity, and increases BDNF mRNA expression in the hippocampus. Selank produces anxiolytic effects comparable to benzodiazepines without sedation, cognitive impairment, or dependence by modulating GABAergic neurotransmission and monoamine metabolism in limbic structures.

Research Applications

1
Anxiety reduction without sedation
2
Immune modulation via tuftsin pathway
3
Cognitive enhancement and memory
4
GABA and monoamine system modulation
5
Nootropic peptide pharmacology
View Published Research on PubMed →

Pricing

SizePer Vial10-Pack
5mg
$16.95$123.95
10mgBest Value
$24.95$181.95

Prices shown per vial from 10-pack. Volume discounts available for 50+ vials — contact us.

HPLC Purity Analysis

High-Performance Liquid Chromatography
99.5%purity
mAURetention Time (min)0250500750100005101520253099.5%
Method: RP-HPLC C18 ColumnDetection: UV 220nmMobile Phase: Acetonitrile/Water + 0.1% TFA

Certificate of Analysis

MiPeptidos
Selank
PASSES ALL SPECIFICATIONS
Batch NumberHR-SLNK-2600115
Date of AnalysisJanuary 1, 2026
Purity (HPLC)99.5%
AppearanceWhite to off-white lyophilized powder
SolubilityFreely soluble in sterile water and bacteriostatic water
Molecular Weight (MS)751.89 Da — Confirmed
Endotoxin (LAL)<0.1 EU/mg
Sterility (USP <71>)Passes USP <71>

This COA is a representative sample. A batch-specific Certificate of Analysis with full HPLC chromatograms and mass spectrometry data is included with every MiPeptidos order.

Reconstitution Calculator

Add this much bacteriostatic water:
5.0 mL
5 mg Selank + 5.0 mL BAC water = 1 mg/mL

Inject bacteriostatic water slowly along the vial wall. Gently swirl until dissolved — never shake. Store reconstituted solution at 2-8°C and use within 30 days.

Download Product Brochure

Get our detailed Selank product brochure with specifications, research applications, HPLC analysis data, and reconstitution guide. Available in English and Spanish.

Customer Reviews

5.0/5from 1 review
Verified
Dr. Alexei Volkov·Moscow, Russia

Selank is our anxiolytic peptide of choice for GABA receptor modulation studies. The tuftsin-derived heptapeptide from MiPeptidos shows expected anxiolytic-like activity in our neuronal culture models. Being Russian, I a...

Jan 29, 2026
View All Reviews →

Frequently Asked Questions

Selank (CAS: 129954-34-3) is a research compound, with a molecular weight of 751.89 Da in the Cognitive / Neuropeptides category. Selank is a synthetic heptapeptide derived from the immunomodulatory peptide tuftsin (Thr-Lys-Pro-Arg) with a C-terminal Pro-Gly-Pro extension that enhances metabolic stability. It modulates the balance of Th1/Th2 cytokines, influences enkephalinase activity, and increases BDNF mRNA expression in the hippocampus. Researchers commonly investigate Selank for Anxiety reduction without sedation, Immune modulation via tuftsin pathway, Cognitive enhancement and memory. Every vial from MiPeptidos includes batch-specific analytical documentation.
Selank is available in 2 sizes (5mg, 10mg), so reconstitution volume depends on which vial you have. For the 5mg size, add 1-2mL of bacteriostatic water; for the 10mg size, use 2-3mL. Always let the vial warm to room temperature first, inject the water slowly along the vial wall, and swirl gently — never shake. Store reconstituted Selank at 2-8°C and use within 30 days. MiPeptidos carries bacteriostatic water in 3mL and 10mL vials.
Selank and Semax are both Russian-developed regulatory peptides, but they target different neurotransmitter systems. Selank (752 Da) is a tuftsin analog that modulates GABA and serotonin systems for anxiolytic effects, while Semax (814 Da) is an ACTH(4-10) analog that drives BDNF/NGF neurotrophic pathways for cognitive enhancement. Selank is approved in Russia for anxiety disorders; Semax for stroke recovery and cognitive enhancement. MiPeptidos carries both for complementary nootropic research.
Store lyophilized Selank at -20°C for maximum long-term stability — properly stored, it remains potent for 24+ months. Once reconstituted with bacteriostatic water, keep it refrigerated at 2-8°C and use within 30 days. In research applications, Selank has a reported half-life of ~3-5 minutes in serum; functional CNS effects last hours, which informs dosing frequency and protocol design. Avoid repeated freeze-thaw cycles and protect from direct light. MiPeptidos ships every order with cold-chain packaging to maintain integrity during transit.
Every Selank order from MiPeptidos includes a batch-specific Certificate of Analysis. Our current batch (HR-SLNK-2600115, tested January 1, 2026) shows 99.5% purity by HPLC, mass spectrometry confirmation at 751.89 Da, endotoxin levels below 0.1 EU/mg, and passing sterility per USP <71>. This level of documentation ensures you can verify compound identity and purity before beginning your research. MiPeptidos also offers bulk pricing on orders of 50+ vials — contact info@mipeptidos.com.

Specifications

Purity
≥99%
Form
Lyophilized Powder
CAS Number
129954-34-3
Mol. Weight
751.89 Da
Formula
C33H57N11O9
Half-Life
~3-5 minutes in serum; functional CNS effects last hours
Storage
Store at -20°C. Reconstituted: 2–8°C for up to 30 days.
Sizes
5mg, 10mg

Sequence

Thr-Lys-Pro-Arg-Pro-Gly-Pro (heptapeptide; tuftsin analog with Pro-Gly-Pro extension)

Research Use Only. This product is intended for laboratory research purposes only. Not for human consumption. Handle with appropriate safety precautions.

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