Certificate of Analysis · Lot release · Issued for Epic Wholesalers LLC -dba-Epic Peptides Lab
Selank 1 mg/mL Pen
Lot PL-2610-179 · Solution · Label claim 1 mg/mL
Tested in-house by PrymaLab
In-house analytical result, not an independent third-party test
Lot / batch number
PL-2610-179
Date made
2026-10-06
Date of analysis
2026-10-08
Date issued
2026-10-23
Retest / expiry
2028-10-06
Units in lot / sampled
264 / 3
Storage
—
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 %
99.66%
Specification ≥ 99.0% • main peak at 14.66 min
Identity · Observed Mass
751.90 Da
Theoretical 751.89 Da • +0.01 Da (13 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
751.90 Da
PASS
Purity
RP-HPLC, UV 214 nm, area%
≥ 99.0%
99.66%
PASS
Largest impurity
RP-HPLC, area%
≤ 1.0%
0.16% (RT 15.20)
PASS
Assay (label claim)
Assay vs label claim
0.95–1.05 mg/mL
0.98 mg/mL
PASS
Bacterial endotoxin
LAL, kinetic
≤ 5.0 EU/mg
0.339 EU/mg
PASS
Sterility
USP <71>, 14-day
No growth
No growth
PASS
1HPLC chromatogram
Data file: PL-2610-179-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-2610-179-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 1 mg/mL Pen · Lot PL-2610-179 · Certificate PL-26-00292
Lot PL-2610-179
Method, peak table and approval
2HPLC method · PL-2610-179-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 †
—
0.14
2
14.66
—
99.66
3
15.20 †
—
0.16
4
15.90 †
—
0.04
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
751.90 Da
Theoretical Mass
751.89 Da
Difference
+0.01 Da (13 ppm)
Data File
PL-2610-179-MS.d
Acceptance
Within ± 1.0 Da
6Additional tests
Test
Performed by
Date
Report / file
Assay vs label claim
PrymaLab Analytical
2026-10-08
—
Endotoxin (LAL, kinetic)
PrymaLab Analytical
2026-10-08
—
Sterility (USP <71>, day-14 read-out)
PrymaLab Analytical
2026-10-22
—
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: 2026-10-23
S. Calloway Reviewer · checked against raw data Date: 2026-10-23
M. Phelps Lab Director · approved for release Date: 2026-10-23
