To verify a Semax + Selank Blend listing, match the SKU, the nominal size on each vial, and the vials-per-pack count, then open a certificate that names that same SKU and a specific batch. The public catalog lists XS20 as 20 mg per vial with 10 vials per pack. Those figures are nominal catalog facts, not the gravimetric fill or purity recorded for one batch.
Match the SKU, vial size and pack quantity
Site guidance on reading a product SKU is editorial guidance, not independent scientific evidence. It treats per-vial size, vials per pack, and pack price as three separate fields. A label such as “10 mg × 10 vials” means ten vials of 10 mg each, not one 100 mg vial. The same reading applies here: XS20 is 20 mg on each vial and 10 vials in the pack, not a single 200 mg container. The 20 mg × 10 total of 200 mg is label arithmetic only.
The SKU table covers public listed variants only, at most 40, and is not a claim that the list is exhaustive. CAS number, molecular formula, and molecular weight are recorded as unknown on the blend page. Unknown is not zero and is not evidence that those identifiers match the single-peptide listings. The catalog gives a combined nominal size of 20 mg and does not publish a milligram split between Semax and Selank. That gap is a documentation limit, not a measured ratio. The vial-size guide says to check whether a blend size is combined and to read the separate ingredient information.
Semax is listed separately as XA10 (10 mg per vial, 10 vials) and XA5 (5 mg per vial, 10 vials), with CAS 80714-61-0. Selank is listed as SK10 and SK5 at the same pack pattern, with CAS 129954-34-3. Guidance on finding a COA by SKU and batch states that blends are separate products, not interchangeable aliases for their ingredients. XA and SK codes, and those CAS numbers, do not verify the blend SKU.
Packaging here means the listed vials-per-pack count. Catalog and COA text do not describe vial material, closures, labels, sterility, storage temperature, or shipping condition.
| Catalog field | Listed value |
|---|---|
| Product name | Semax + Selank Blend |
| SKU | XS20 |
| Nominal size per vial | 20 mg |
| Vials per pack | 10 |
| Nominal pack sum (label arithmetic) | 200 mg |
Open the COA that names that SKU and batch
A SKU identifies a listed product variant; a batch number identifies a batch record. Finding a COA requires both, because a product name alone is not enough when several sizes or batches exist. Verification guidance starts by matching product name, SKU, and batch number, then comparing certificate number and test date with the original report, and only then following the report-specific verification link. Seeing a link is not proof that a provider record is currently valid. The published blend COA notes that provider verification links were not independently fetched.
One published record is batch UIK280FG1SKG, certificate QC-2026-PAYHGQT8PS, SKU XS20 (20 mg). The listed laboratory is Stand Science & Technology Pharmaceutical (Qingdao) Co., Ltd. (Stand Group); the test date is 2026-08-02. Scope is the published results for this batch only—not every batch, and not clinical suitability. A published report does not mean every order receives that batch; confirm the allocated batch separately.
| Report type | Recorded result |
|---|---|
| Identity | Conforms |
| Purity | 99.5 % |
| Weight | 23.29 mg |
| Endotoxin | <3 EU/mg |
Line items for analyte Semax + Selank Blend XS20:
- Appearance, Visual: specification “White or almost white loose powder”; result “White loose powder”; determination Pass.
- Mass spectrum, MS: specification “Corresponds to theoretical mass”; result “Conforms”; determination Pass.
- Purity, HPLC: specification NLT 98.0 %; result 99.5 %; determination Pass.
- Total peptide content, HPLC: specification NLT 90.0 %; result 92.9 %; determination Pass.
- Actual fill, Gravimetric: specification 20 mg; result 23.29 mg; determination Pass.
- Water content, Karl Fischer: specification NMT 8.0 %; result 5.1 %; determination Pass.
- Bacterial endotoxins, LAL (gel-clot): specification NMT 10 EU/mg; result <3 EU/mg; determination Pass.
The gravimetric fill of 23.29 mg is a measurement for UIK280FG1SKG only. It does not rewrite the catalog nominal size of 20 mg.
Do not substitute a Semax or Selank report. Published Semax examples include batch XDMN4VEFXOWW (SKU XA5) and batch K1TT9FVXXGDC (SKU XA10). Published Selank examples include PESJ92EKI53F (SK5) and LJPQCBWWFCTT (SK10). Those certificates name different products and SKUs. A missing public blend result is not automatically a failed test and is not a passed test either.
Checklist before you rely on a record
- Confirm the product name is Semax + Selank Blend, not Semax or Selank alone.
- Confirm SKU XS20 on the product listing; the public table is not claimed to be exhaustive.
- Confirm nominal size 20 mg per vial and 10 vials per pack as separate fields.
- Treat 20 mg × 10 as pack-label arithmetic only.
- Locate the batch on the order documentation, or open UIK280FG1SKG only if that is the record you are checking.
- Match certificate QC-2026-PAYHGQT8PS, test date 2026-08-02, laboratory name, and SKU XS20 when using that example.
- Compare each analyte, method, unit, qualifier, and determination with the original report; keep the “<” in <3 EU/mg and keep 99.5 % as recorded.
- Follow the report-specific verification link if you need provider confirmation; resolve login or unmatched records before treating verification as complete.
- If any field differs, send support the SKU, batch number, and the specific difference rather than substituting another peptide’s COA.
If quotation paperwork uses a different packaging description, the vial-size guide says to ask support to reconcile it before relying on the calculation.
Frequently Asked Questions
What SKU, vial size and pack quantity are listed for Semax + Selank Blend?
The public product listing shows SKU XS20, a nominal size of 20 mg per vial, and 10 vials per pack. That table covers public listed variants only and is not a claim that the list is exhaustive.
Does the published UIK280FG1SKG COA apply to every blend order?
No. The certificate records results for batch UIK280FG1SKG and SKU XS20 only. A published report does not mean every order receives that batch; confirm the allocated batch separately.
Can a Semax or Selank COA be used to verify the blend?
No. Blends are separate products, not interchangeable aliases for their ingredients. Use the complete blend name and SKU, such as Semax + Selank Blend XS20.
What purity and fill values are recorded on the XS20 blend COA?
For batch UIK280FG1SKG, HPLC purity is 99.5 %, HPLC total peptide content is 92.9 %, and gravimetric actual fill is 23.29 mg, against a 20 mg fill specification.
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.
