Certificate of Analysis · Lot release · Issued for Epic Wholesalers LLC -dba-Epic Peptides Lab
Glutathione 1500 mg
Lot PL-2610-085 · Lyophilized powder · Label claim 1500 mg per vial
Tested in-house by PrymaLab
In-house analytical result, not an independent third-party test
Lot / batch number
PL-2610-085
Date made
2026-10-02
Date of analysis
2026-10-05
Date issued
2026-10-20
Retest / expiry
2028-10-02
Units in lot / sampled
286 / 2
Storage
−20 °C, desiccated, dark, protected from air
Certificate type
Lot COA, 2 pages
Compound
Glutathione
GSH; γ-L-glutamyl-L-cysteinyl-glycine
CAS number
70-18-8
Molecular formula
C10H17N3O6S
Theoretical mass (avg.)
307.32 Da
Sequence
gamma-ECG
Purity · RP-HPLC, area %
99.69%
Specification ≥ 99.0% • main peak at 4.90 min
Identity · Observed Mass
307.34 Da
Theoretical 307.32 Da • +0.02 Da (65 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
307.34 Da
PASS
Purity
RP-HPLC, UV 214 nm, area%
≥ 99.0%
99.69%
PASS
Largest impurity
RP-HPLC, area%
≤ 1.0%
0.21% (RT 6.20)
PASS
Water content
Karl Fischer
≤ 5.0%
1.63%
PASS
Bacterial endotoxin
LAL, kinetic
≤ 5.0 EU/mg
0.026 EU/mg
PASS
Sterility
USP <71>, 14-day
No growth
No growth
PASS
1HPLC chromatogram
Data file: PL-2610-085-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-2610-085-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
Glutathione 1500 mg · Lot PL-2610-085 · Certificate PL-26-00203
Lot PL-2610-085
Method, peak table and approval
2HPLC method · PL-2610-085-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
3.90 †
—
0.04
2
4.90
—
99.69
3
5.60 †
—
0.06
4
6.20 †
—
0.21
Total
—
100.00
Peaks: 1 oxidized glutathione (gssg); 2 main peak (Glutathione); 3 deamidation product; 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)
308.33 (M+H)+
Deconvoluted Mass
307.34 Da
Theoretical Mass
307.32 Da
Difference
+0.02 Da (65 ppm)
Data File
PL-2610-085-MS.d
Acceptance
Within ± 1.0 Da
6Additional tests
Test
Performed by
Date
Report / file
Water content (Karl Fischer)
PrymaLab Analytical
2026-10-05
—
Endotoxin (LAL, kinetic)
PrymaLab Analytical
2026-10-05
—
Sterility (USP <71>, day-14 read-out)
PrymaLab Analytical
2026-10-19
—
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: 2026-10-20
S. Calloway Reviewer · checked against raw data Date: 2026-10-20
M. Phelps Lab Director · approved for release Date: 2026-10-20
