Certificate of Analysis

Sample Identification

Compound	PT-141 (Bremelanotide; Melanocortin Receptor Agonist)	Client	Numira Peptides · numira.cc
CAS Number	189691-06-3	Date Received	2025-05-05
Molecular Formula	C₅₀H₆₈N₁₄O₁₀	Date Tested	2025-05-08
Molecular Weight	1025.17 g/mol	Date Reported	2025-05-14
Lot Number	NML-PT141-250508	Test Methods	HPLC-UV · ICP-MS · Kinetic LAL
Appearance	White lyophilised powder	PubChem CID	9941444

HPLC-UV Purity & Content Analysis

20 mg

Ordered Amount

19.94 mg

Measured Amount

99.30%

Purity (HPLC-UV)

99.7%

Recovery

Fig. 1 — HPLC-UV Chromatogram (214 nm) · Run: NML_PT141_250508_1.d

APPEARANCE

#	Retention Time (min)	Area	% Area	Assignment
1	2.33	1.01E+02	0.28	Unknown impurity
2	6.30	3.58E+04	99.30	PT-141 (Bremelanotide)
3	8.92	1.52E+02	0.42	Unknown impurity

Bacterial Endotoxin Test (USP <85>)

Method	Result	Specification	Verdict
Kinetic LAL (USP <85>)	< 0.125 EU/mL	≤ 0.125 EU/mL	PASS

Elemental Impurities (USP <233> / ICH Q3D)

Element	Method	Result (ppm)	Limit (ppm)	Verdict
Arsenic (As)	ICP-MS	< 0.001	2.1	PASS
Cadmium (Cd)	ICP-MS	< 0.001	0.5	PASS
Lead (Pb)	ICP-MS	< 0.001	0.5	PASS
Mercury (Hg)	ICP-MS	< 0.001	3.0	PASS

Note: Peptide samples may contain counter-ions (TFA, acetate) and excipients (mannitol, sucrose) used as lyoprotectants and pH buffers. These are not detected by UV and are not classified as impurities under USP <233>.

Analysis Performed by
Dr. M. Chen, Ph.D. (Analytical Chemistry)
Senior Analytical Chemist · Nexus Molecular Labs
info@nexusmolecularlabs.com
2025-05-14

PT-141 · 20 mg