To verify a Selank listing, match the catalog SKU and per-vial size to the pack quantity, then open the certificate of analysis (COA) that carries that same SKU and batch number. A product name by itself is not enough when several sizes or batches exist, as the site editorial guide on finding a COA by SKU and batch explains.
Catalog SKUs, vial size, and pack quantity
The public Selank specification lists CAS number 129954-34-3, molecular formula C33H57N11O9, and molecular weight 751.9. Two public listed variants are SK5 (nominal 5 mg per vial, 10 vials per pack) and SK10 (nominal 10 mg per vial, 10 vials per pack). That catalog scope is public listed variants only, at most 40, and is not a claim that the list is exhaustive.
Read the per-vial size, vials per pack, and pack price as three separate fields, following the site editorial guide on per-vial size versus pack quantity. A label such as 10 mg × 10 vials describes ten vials with a nominal size of 10 mg each. It is not a single vial containing 100 mg. The sum across one pack is label arithmetic, not an analytical measurement. Actual fill and peptide-content measurements belong to the particular batch report.
| SKU | Nominal size per vial | Vials per pack | Nominal pack sum (label arithmetic) |
|---|---|---|---|
| SK5 | 5 mg | 10 | 50 mg |
| SK10 | 10 mg | 10 | 100 mg |
If a quotation uses a different packaging description, ask support to reconcile it before relying on the calculation.
Matching a COA to SKU and batch
A SKU identifies a listed product variant. A batch number identifies a batch record. Use both when locating a COA: open the product page, select the SKU, and read the matching certificate panel.
Do not use a report for one size as evidence for another merely because both say Selank. Batch PESJ92EKI53F is recorded for SK5; batch LJPQCBWWFCTT is recorded for SK10. An older published batch is not evidence of the batch that will be shipped next. If a public report is missing, ask support for the exact SKU and batch. A missing public result is not automatically a failed test, and it is not a passed test either.
SK5 batch PESJ92EKI53F recorded results
Published recorded results for Selank batch PESJ92EKI53F apply to this batch only. Certificate number QC-2026-7SAZLAPQB9, SKU SK5 (5 mg), laboratory Stand Science & Technology Pharmaceutical (Qingdao) Co., Ltd. (Stand Group), test date 2026-08-24. Provider verification links were not independently fetched. The record is not evidence of clinical suitability or of every batch.
Summary fields: Identity 751.0 Da (Pass); Purity 99.1 % (Pass); Weight 5.99 mg (Pass); Endotoxin <3 EU/mg (Pass).
| Item | Analyte | Method | Specification | Result | Determination |
|---|---|---|---|---|---|
| Appearance | Selank SK5 | Visual | White or almost white loose powder | White loose powder | Pass |
| Mass spectrum | Selank SK5 | MS | 751.9 +/- 1.0 Da | 751.0 Da | Pass |
| Purity | Selank SK5 | HPLC | NLT 98.0 % | 99.1 % | Pass |
| Peptide content | Selank SK5 | HPLC | NLT 90.0 % | 91.4 % | Pass |
| Actual fill | Selank SK5 | Gravimetric | 5 mg | 5.99 mg | Pass |
| Water content | Selank SK5 | Karl Fischer | NMT 8.0 % | 4.5 % | Pass |
| Bacterial endotoxins | Selank SK5 | LAL (gel-clot) | NMT 10 EU/mg | <3 EU/mg | Pass |
SK10 batch LJPQCBWWFCTT recorded results
Published recorded results for Selank batch LJPQCBWWFCTT apply to this batch only. Certificate number QC-2026-JKUGT2M62L, SKU SK10 (10 mg), laboratory Stand Science & Technology Pharmaceutical (Qingdao) Co., Ltd. (Stand Group), test date 2026-08-24. Provider verification links were not independently fetched. The record is not evidence of clinical suitability or of every batch.
Summary fields: Identity 751.5 Da (Pass); Purity 99.0 % (Pass); Weight 11.62 mg (Pass); Endotoxin <3 EU/mg (Pass).
| Item | Analyte | Method | Specification | Result | Determination |
|---|---|---|---|---|---|
| Appearance | Selank SK10 | Visual | White or almost white loose powder | White loose powder | Pass |
| Mass spectrum | Selank SK10 | MS | 751.9 +/- 1.0 Da | 751.5 Da | Pass |
| Purity | Selank SK10 | HPLC | NLT 98.0 % | 99.0 % | Pass |
| Peptide content | Selank SK10 | HPLC | NLT 90.0 % | 90.9 % | Pass |
| Actual fill | Selank SK10 | Gravimetric | 10 mg | 11.62 mg | Pass |
| Water content | Selank SK10 | Karl Fischer | NMT 8.0 % | 4.3 % | Pass |
| Bacterial endotoxins | Selank SK10 | LAL (gel-clot) | NMT 10 EU/mg | <3 EU/mg | Pass |
Nominal catalog size is not the same as gravimetric fill on these pages: SK5 is specified at 5 mg with a recorded fill of 5.99 mg; SK10 is specified at 10 mg with a recorded fill of 11.62 mg.
Verifying the original certificate
The site editorial page on how to verify a CertiPeptide COA starts by matching product name, SKU, and batch number. Open the original report and compare its certificate number and test date with the summary. Then use the verification link for that report. A verification page may require an account with the report provider; seeing a link alone does not prove that a report is currently valid.
- Read the product and SKU from the product page or order documentation.
- Find the batch. If the allocated batch is not stated, ask support to confirm it.
- Open the batch page and check the certificate number, sample identity, test date, and listed laboratory.
- Open the original report and compare the values and units with the summary.
- Follow the report-specific verification link. If the provider requests login or the record cannot be confirmed, resolve that with the provider or support before treating verification as complete.
Do not substitute a report for a similar product or a different size. Send support the SKU, batch number, and the specific difference. A screenshot is useful for comparison, but the original document and provider record are stronger evidence. These Selank pages are published examples, not a promise that a future order will receive PESJ92EKI53F or LJPQCBWWFCTT.
Verification checklist
- Product name is Selank on the product specification.
- SKU is SK5 or SK10, with the listed mg per vial and 10 vials per pack.
- Allocated batch number matches the COA page, not a different published batch.
- Certificate number, laboratory name, analyte (Selank SK5 or Selank SK10), methods, units, and determinations match the original report.
- Pack-sum milligrams stay label arithmetic; gravimetric actual fill comes from the matching batch only.
- Unpublished tests stay unknown: a missing public row is not a pass and is not a fail.
Frequently Asked Questions
Which Selank SKUs are on the public listing?
The public listing includes SK5 (5 mg per vial, 10 vials per pack) and SK10 (10 mg per vial, 10 vials per pack). That scope is public listed variants only, at most 40, and is not a claim that the list is exhaustive.
Can the SK5 COA stand in for SK10?
No. A report for one size should not be used as evidence for another size merely because both say Selank. Batch PESJ92EKI53F is recorded for SK5; batch LJPQCBWWFCTT is recorded for SK10.
Does a published Selank report mean every order receives that batch?
No. Confirm the batch allocated to the order separately. An older published batch is not evidence of the batch that will be shipped next.
What if a public Selank COA is missing?
Ask support for the exact SKU and batch. A missing public result is not automatically a failed test, and it is not a passed test either.
Explore Further
Browse our research peptide catalog and review third-party lab reports & COAs for published batches.
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Research use only. The information above is provided for educational and laboratory research purposes only. The compounds discussed are not approved for human or veterinary use, diagnosis, treatment, or the prevention of any disease. Nothing here is medical advice.
