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PuriLab Analytical
COA/TZ-2026-002Verified
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Certificate of Analysis

PuriLab Analytical

Tirzepatide 20 mg

TZ-2026-002Lot TR20260907Analyzed October 9, 2026
Tirzepatide 20 mg vial as received

Timeline

Ordered
October 5, 2026
Received
October 8, 2026
Analyzed
October 9, 2026

Sample

Name
Tirzepatide 20 mg
Expected
Tirzepatide
Amount
1 vial, lyophilized powder

Testing

Client
Cowtown Peptides
Test type
Content & purity
Method
HPLC-UV
Content, how much is in it
17.8mg
Label claim: 20 mg
Purity, how clean it is
99.1%
by HPLC-UV peak area

Chromatogram

HPLC-UV

mAU5010016182022Retention time (min), 15 to 23 min19.46
19.46 min, Tirzepatide, 99.1%

Analyst Comments

White lyophilized powder, green-cap vial, received sealed.

Analyst Signature

Max Barrett
Lab Director, PuriLab Analytical
Analysis date: October 9, 2026

Verification Code

TZ-C3N7-V8JF
Verify at purilab.org/verify/TZ-C3N7-V8JF

Scan to Verify

TZ-C3N7-V8JF

Results apply solely to the sample as received and are not representative of any larger lot, batch, or production run. Findings are limited to the analytes stated above. PuriLab Analytical is an independent testing laboratory, is not CLIA certified or ISO 17025 accredited, does not sell or distribute any substance, and makes no representation as to the safety, legality, or fitness of any material for any use.

PuriLab Analyticaladmin@purilab.org
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