Certificate of Analysis · Lot release · Issued for Epic Wholesalers LLC -dba-Epic Peptides Lab
Selank 5 mg
Lot PL-2610-176 · Lyophilized powder · Label claim 5 mg per vial
Tested in-house by PrymaLab
In-house analytical result, not an independent third-party test
Lot / batch number
PL-2610-176
Date made
2026-10-06
Date of analysis
2026-10-07
Date issued
2026-10-22
Retest / expiry
2028-10-06
Units in lot / sampled
317 / 2
Storage
−20 °C, desiccated, dark
Certificate type
Lot COA, 2 pages
Compound
Selank
Tuftsin-Pro-Gly-Pro heptapeptide (TKPRPGP)
CAS number
129954-34-3
Molecular formula
C33H57N11O9
Theoretical mass (avg.)
751.89 Da
Sequence
TKPRPGP
Purity · RP-HPLC, area %
99.79%
Specification ≥ 99.0% • main peak at 14.62 min
Identity · Observed Mass
751.86 Da
Theoretical 751.89 Da • −0.03 Da (40 ppm)
Overall conclusion
PASS
Meets every specification for the tests performed
Test
Method
Specification
Result
Conclusion
Identity (mass)
LC-MS, ESI positive
Theoretical ± 1.0 Da
751.86 Da
PASS
Purity
RP-HPLC, UV 214 nm, area%
≥ 99.0%
99.79%
PASS
Largest impurity
RP-HPLC, area%
≤ 1.0%
0.13% (RT 15.20)
PASS
Water content
Karl Fischer
≤ 5.0%
1.39%
PASS
Bacterial endotoxin
LAL, kinetic
≤ 5.0 EU/mg
0.278 EU/mg
PASS
Sterility
USP <71>, 14-day
No growth
No growth
PASS
1HPLC chromatogram
Data file: PL-2610-176-HPLC.raw · Column C18, 150 × 4.6 mm · UV 214 nm
Peak plot drawn from the integrated peak table (area %, log scale); it is not the instrument trace, which is retained in PL-2610-176-HPLC.raw. † Nominal reference retention time for the assigned impurity; the main-peak RT is observed in this lot.
Epic Wholesalers LLC -dba-Epic Peptides Lab
Certificate of Analysis · continued
Selank 5 mg · Lot PL-2610-176 · Certificate PL-26-00289
Lot PL-2610-176
Method, peak table and approval
2HPLC method · PL-2610-176-HPLC.raw
Instrument
Waters Alliance e2695
Data System
Empower 3
Detector
UV absorbance
Detection Wavelength
214 nm
Column
C18, 150 × 4.6 mm, 3.5 µm
Mobile Phase A
0.1% TFA in water
Mobile Phase B
0.1% TFA in MeCN
Gradient
5–95% B over 25 min (linear)
Flow Rate
1.0 mL/min
Column Temperature
40 °C
Injection Volume
10 µL
3Gradient program
Time (min)
% A
% B
0.0
95
5
25.0
5
95
4Peak table
Peak
RT (min)
Area
Area %
1
13.40 †
—
0.05
2
14.62
—
99.79
3
15.20 †
—
0.13
4
15.90 †
—
0.03
Total
—
100.00
Peaks: 1 deamidation product; 2 main peak (Selank); 3 truncated sequence; 4 unidentified impurity · Area % from the integrated peak table (absolute areas are not part of the lot-release export) · † nominal reference RT for the assigned impurity · Purity = main peak area ÷ total integrated area × 100, to two decimals; main peak shaded.
5Identity by mass spectrometry
Instrument
Waters SQD
Ionization / Mode
ESI, positive
Reference m/z (charge)
752.90 (M+H)+
Deconvoluted Mass
751.86 Da
Theoretical Mass
751.89 Da
Difference
−0.03 Da (40 ppm)
Data File
PL-2610-176-MS.d
Acceptance
Within ± 1.0 Da
6Additional tests
Test
Performed by
Date
Report / file
Water content (Karl Fischer)
PrymaLab Analytical
2026-10-07
—
Endotoxin (LAL, kinetic)
PrymaLab Analytical
2026-10-07
—
Sterility (USP <71>, day-14 read-out)
PrymaLab Analytical
2026-10-21
—
A test with no row here was not performed on this lot. Outside-laboratory reports, when used, are attached and named below.
7Review and approval
D. Reynolds Analyst · performed the testing Date: 2026-10-22
S. Calloway Reviewer · checked against raw data Date: 2026-10-22
M. Phelps Lab Director · approved for release Date: 2026-10-22
