About this category
Cognitive peptides include both short peptides (Selank, Semax, P21) and small molecules (Noopept, Dihexa). N-acetylated and amidated variants are common and require precise mass spec discrimination. We confirm the exact analog and report any related impurities.
Featured peptides we test
Selank / NA-Selank / NA-Selank-Amidate
751.88 g/mol
Selank is a synthetic heptapeptide based on tuftsin, developed in Russia for anxiolytic and nootropic research. NA-Selank (N-acetyl) and NA-Selank-Amidate are stability-enhanced variants for intranasal and injectable research.
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Semax / NA-Semax / NA-Semax-Amidate
813.94 g/mol
Semax is a synthetic heptapeptide based on the N-terminal fragment of ACTH(4-10), developed in Russia for cognitive and neuroprotective research. NA-Semax and NA-Semax-Amidate are stability-enhanced variants.
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Noopept
318.37 g/mol
Noopept is a synthetic dipeptide derivative studied for cognitive enhancement and neuroprotection. It is many times more potent than piracetam in preclinical models and has been studied in mild cognitive impairment research.
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Dihexa
456.62 g/mol
Dihexa is a small-molecule angiotensin IV analog studied for its potent neurotrophic and cognitive-enhancing effects. It is reported to be many times more potent than BDNF in promoting synaptogenesis in preclinical studies.
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P21 (P21 Peptide)
~2200 g/mol
P21 is a synthetic peptide derived from CNTF (ciliary neurotrophic factor) studied for its neurogenic and cognitive effects. It has been investigated in neurodegenerative disease and cognitive enhancement research.
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Pinealon
418.40 g/mol
Pinealon is a Khavinson tripeptide bioregulator targeting brain and pineal tissue. It is studied for cognitive support, neuroprotection, and circadian regulation in aging research.
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Sample submission
- Specify the exact analog: NA-Selank vs. NA-Selank-Amidate, etc.
- Small molecules like Noopept use HPLC-UV; peptides use HPLC + MS.
- 0.5 mg sufficient for most analyses.
Common impurities
- Wrong analog (acetylated vs. non)
- Hydrolysis products
- Synthesis byproducts
Recommended tests
- HPLC Purity
- LC-MS Identity
- Residual Solvents
All Cognitive / Nootropic peptides we test (7)
Cognitive / Nootropic Testing Methodology
Our analytical workflow for cognitive / nootropic peptides follows USP <1225> guidance for validated chromatographic methods. Every lot is processed by a credentialed analyst with documented chain of custody.
Step 1
Sample intake & cold storage
Each Cognitive / Nootropic sample is logged with a chain-of-custody ID and stored at -20 °C upon arrival at our Florida lab.
Step 2
Reverse-phase HPLC purity
Samples are run on a C18 column using a water/acetonitrile gradient with 0.1% TFA, with UV detection at 214 nm to quantify main peak purity and named impurities.
Step 3
LC-MS / Orbitrap identity
Observed monoisotopic mass is compared against the theoretical mass for each cognitive / nootropic compound to confirm identity. Blends are deconvoluted to quantify each active component.
Step 4
Optional residual & endotoxin testing
Residual solvents (GC-MS), residual TFA / acetate counterions, and bacterial endotoxin (LAL) are run on request based on intended downstream use.
Step 5
Signed Certificate of Analysis
Findings are compiled into a signed COA with chromatograms, spectra, instrument metadata, and analyst interpretation, delivered within 9-11 business days.
Cognitive / Nootropic Purity Notes
Recommended research-grade purity for cognitive / nootropic peptides is typically ≥ 98% by HPLC area. Synthesis-related impurities are common and only show up under proper analytical scrutiny.
Common impurities to watch
- Wrong analog (acetylated vs. non)
- Hydrolysis products
- Synthesis byproducts
What our COA confirms
- Main peak purity by HPLC area %
- Observed vs theoretical monoisotopic mass
- Named impurities ≥ 0.1% area
- Net peptide content where applicable
- Method, column, and instrument metadata
Cognitive / Nootropic Handling, Storage & Safety
Guidance below is for laboratory and research personnel only. Cognitive / Nootropic peptides are supplied for research use and are not intended for human or veterinary use.
Storage
Store lyophilized material at -20 °C, protected from light and moisture. After reconstitution, aliquot and store at -80 °C; avoid repeated freeze-thaw cycles.
Reconstitution
Reconstitute in bacteriostatic or sterile water in a clean environment. Allow vials to reach room temperature before opening to prevent moisture condensation on the powder.
PPE & shipping
Handle with gloves, lab coat, and eye protection. Ship samples to ACS overnight on dry ice or cold packs in a rigid, leak-proof container with a packing slip referencing your quote.
This page is informational and does not constitute medical advice. Consult your institution's safety officer and SDS before working with these compounds.
Frequently asked questions
Related testing resources
- HPLC purity testing for cognitive / nootropic peptides
- Mass spectrometry identity confirmation (ESI-MS)
- Heavy metal and residual solvent screening
- LAL endotoxin testing for injectable peptides
- Peptide testing cost by assay
- How to ship peptides to our lab
- Independent third-party COA verification
- Peptide testing labs near me — all 50 states
- How to read a peptide Certificate of Analysis
- What peptide testing labs measure
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Mitochondrial & Longevity Compound Testing
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Khavinson Bioregulator Testing
Epitalon, Pinealon, Vesugen, Vilon, Prostamax, Pancragen, and the full Khavinson short-peptide bioregulator family.
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Compounded Peptide Blend Testing
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