Lot B6523 is one of 7 lots of Selank we have release-tested for this catalogue, scored on purity, quantity, and batch traceability. Independent third-party HPLC/MS verification of this lot is available on request.
9.0/10
A Great
Purity
3.0 / 4
Quantity
4.0 / 4
Identifier
2.0 / 2
The test score is calculated from purity (how much of the vial content is the expected compound, with values closest to 100% best and below 98% considered unacceptable), quantity (how close the measured amount is to the label claim, more than plus or minus 20% is unacceptable), and identifier (whether the batch this vial came from can be traced to a certificate).
Sample details
ProductSelank 10mg
Sample typeSealed retail vial
Date received22 Jun 2026
Physical detailsPrinted label / aluminium crimp / green cap
Test details
MethodRP-HPLC-UV + LC-MS
Tested on24 Jun 2026
Tested byRTT Peptides QC
ReportQC-26225
Score breakdown
Purity
98.86%
3.0 / 4
Measured purity by RP-HPLC-UV against the ≥ 98.0% release specification. Net peptide content 88.1%.
Quantity
9.7mg
4.0 / 4
Label claim 10mg, measured 9.7mg, divergence -3.0%. Within plus or minus 5% of label scores full marks.
Identifier
B6523
2.0 / 2
Batch identifier printed on the vial and traceable to this certificate, so the lot can be verified end to end.
Analytical release certificate · RP-HPLC-UV with LC-MS confirmation Independent third-party verification available on request.
ReportQC-26225Issued2026-06-25Page1 of 1
Certificate of Analysis
Selank · Lot B6523
SampleSelank
Issued forRTT Peptides
Lot / BatchB6523
Label claim10mg
CAS129954-34-3
AppearanceWhite lyophilised powder
Date received2026-06-22
Date analysed2026-06-24
01 Purity by RP-HPLC-UV
Figure 1 · Reverse-phase HPLC-UV chromatogram at 214 nm. C18, 2.7 µm; gradient 0.1% TFA in water / acetonitrile at 1.0 mL/min.
Purity by RP-HPLC-UV: component retention time, peak area, and area percent
#
Component
RT (min)
Area (mAU·s)
Area %
1
RRT 0.53
4.32
16.4
0.39
2
RRT 0.64
5.16
15.1
0.36
3
Selank ▸ main
8.10
4152.1
98.86
4
RRT 1.08
8.72
16.4
0.39
✓
Purity (HPLC) 98.86% · net peptide content 88.1% · meets the ≥ 98.0% release specification.
02 Identity by LC-MS
Expected average mass751.89 Da
Observed mass751.94 Da
✓
Identity confirmed · observed mass conforms to the expected structure of Selank.
03 Summary of results
Summary of results: test, method, specification, result, and outcome
Test
Method
Specification
Result
Outcome
Purity
RP-HPLC-UV, 214 nm
≥ 98.0 %
98.86 %
✓ Pass
Identity
LC-MS (ESI+)
Consistent with structure
Confirmed
✓ Pass
Net peptide content
By difference
Report
88.1 %
n/a
Appearance
Visual
White lyophilised powder
Conforms
✓ Pass
Reconstitution
Bacteriostatic water
Clear, particulate-free
Conforms
✓ Pass
The submitted lot conforms to identity and meets the stated purity specification. Analysis was performed by RP-HPLC-UV with LC-MS confirmation. Results relate only to the lot as received and tested and do not constitute a certificate of any third party.
Quality Assurance · RTT Peptides
Issued under the RTT Peptides quality programme; this is the vendor's own release certificate. Independent third-party HPLC/MS verification of any lot is available on request. Products are supplied strictly as research reagents for in-vitro laboratory use only, not for human or animal consumption. Report QC-26225 · RP.
This is the vendor's own release certificate. Independent third-party HPLC/MS verification of this lot is available on request.
Research use only
RTT Peptides sells laboratory research reagents. They are not for human or animal consumption. Please confirm before entering.
