Selank frequently asked questions
Answers about Selank, how it is tested, how to read and verify its certificates, ordering, and Selank Labs. Figures update automatically from the current lot data.
Last updated
Product
What is Selank?
Selank is a synthetic heptapeptide. Selank Labs supplies it as a white lyophilized powder in 10 mg vials, with an independent certificate of analysis for every lot.
What is Selank research material?
Selank research material is Selank supplied for laboratory research, sold by lot, with each lot's identity, purity and net content documented by an independent laboratory in a published certificate of analysis.
What is the molecular formula and weight of Selank?
The molecular formula is C33H57N11O9 and the average molecular weight is 751.87 g/mol. The peptide has 7 residues.
How should Selank be stored?
Store sealed, dry and protected from light at the temperature stated on the vial label. Allow a cold vial to reach room temperature before opening.
What is the sequence of Selank?
Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP): the tuftsin tetrapeptide followed by a Pro-Gly-Pro extension.
What vial size is Selank sold in?
10 mg vials, sold through Klow.bio. The current lot measured 13.34 mg of peptide in the tested 10 mg vial.
Testing and quality
How is Selank analyzed?
Selank is analyzed with complementary methods: HPLC-UV for purity, LC-MS for identity, a quantitative measurement for net content, and, where listed, LAL endotoxin and PCR microbial testing. Results are published per lot at selank.bio/coa/.
Who tests Selank?
Every lot is tested by Freedom Diagnostics, an independent third-party analytical laboratory. Selank Labs does not test its own material for published certificates.
What purity does Selank test at?
Current lots report HPLC-UV purity 99.77%, against a stated release specification of ≥95%. The most recent result is 99.77% for lot KB55627.
How is the identity of Selank confirmed?
By liquid chromatography–mass spectrometry (LC-MS), performed by Freedom Diagnostics on every lot. LC-MS separates the sample and measures the mass of the main component, confirming it has the molecular weight expected for the compound.
Is Selank tested for endotoxin?
Endotoxin and microbial testing are reported per lot. Every lot page in the COA archive states whether those tests were performed.
What is HPLC testing, and what does the purity percentage mean?
HPLC (high-performance liquid chromatography) separates a sample's components so each appears as a peak. The purity percentage is the main peak's share of all UV-detected peak area. It does not confirm identity (the separate LC-MS test does) or measure the amount of peptide in the vial (net content does).
Certificates of analysis
What is a Selank COA?
A Selank certificate of analysis is the testing laboratory's report for one lot: the lot number, test dates, methods and results for purity, identity and net content. Selank Labs publishes every lot's COA as a readable page at selank.bio/coa/.
Where can I find the COA for my vial?
Find the lot number printed on your vial label and enter it at selank.bio/verify/, or open that lot in the COA archive at selank.bio/coa/.
How do I confirm a COA with the laboratory?
Scan the Freedom Diagnostics QR code printed on the certificate, then search for klow.bio under the Company tab to view the laboratory record.
Why is the measured net content different from the vial size?
Net content is the laboratory's measurement of peptide in the tested vial. Current lots measured 13.34 mg in a 10 mg vial.
Buying Selank
Where can I buy Selank?
Current Selank research material availability is provided through Klow.bio, the purchasing platform operated by Klow Labs: https://klow.bio/product/selank/ Lot records, testing information and certificates of analysis are published on selank.bio so they can be reviewed before purchasing.
Can I order Selank?
Yes. Purchasing information and current availability for Selank research material are provided through Klow.bio: https://klow.bio/product/selank/
Is every Selank lot independently tested?
Yes. Every lot is tested by Freedom Diagnostics, an independent laboratory, for HPLC-UV purity, LC-MS identity and net content. The stated release specification is ≥95% HPLC-UV purity with identity confirmed by LC-MS. The current lot, KB55627, reported 99.77% purity.
How can I verify a Selank lot?
Enter the lot number from your vial label at selank.bio/verify/ to see that lot's results. To confirm with the laboratory directly: Scan the Freedom Diagnostics QR code printed on the certificate, then search for klow.bio under the Company tab to view the laboratory record.
How much does Selank cost?
The current price is $29.99, with bundle pricing (2 vials save 5%; 3 or more vials save 10%). Current pricing is always listed on Klow.bio.
How fast does Selank ship?
Orders ship the next business day. Same-day cutoff is 4:00 PM CT, with overnight and 2-day options at checkout.
Company
Who is Selank Labs?
Selank Labs is a dedicated Selank research supplier with a controlled sourcing and quality-assurance program. Research material is sourced through our qualified manufacturing supply chain and subjected to analytical testing and lot-level documentation before release. Selank Labs is operated by Klow Labs LLC in Chicago, IL. Purchasing is handled through Klow.bio.
Who operates Selank Labs?
Selank Labs is operated by Klow Labs LLC, 3838 N Ravenswood Ave PMB 2027, Chicago, IL 60613. Klow Labs LLC also operates klow.bio.
Does Selank Labs provide medical or usage advice?
No. Selank Labs supplies research material and publishes analytical documentation. It does not provide medical advice, dosing, administration guidance or protocols.
How do I contact Selank Labs?
Email contact@klow.bio, call (708) 262-7687, or use the contact form at selank.bio/contact/.
Didn't find your answer? Contact Selank Labs and include your lot number if your question is about a specific vial.
Buy Selank
10 mg vials. Current lot KB55627 tested at 99.77% purity with identity confirmed by LC-MS. Current purchasing is available through Klow.bio.