Certificate of Analysis

Product Name

Selank

Lot No.

3132030

Report Date

15 July 2026

Storage

-20°C (routine 2-8°C)

Sequence

Thr-Lys-Pro-Arg-Pro-Gly-Pro

Modifications

C-terminal amidation

Test Results

Test Item	Specification	Result
Appearance	White to off-white lyophilized powder	Conforms
Molecular Weight (MS)	751.9 ±1.0 Da	751.8 Da
Purity (HPLC)	>98%	99.5%
Retention Time (HPLC)	+0.2 min of standard	Conforms
Related Substances (HPLC)	≤0.5% each / ≤2.0% total	Conforms
Solubility	Freely soluble in water	Conforms
Acetic Acid Content	≤5000 ppm	820 ppm
TFA Content	≤50 ppm	7 ppm
DCM Content	≤50 ppm	N.D.
DMF Content	≤100 ppm	N.D.
Total Aerobic Count	≤100 CFU/g	<10 CFU/g
Yeast & Molds Count	≤10 CFU/g	<10 CFU/g
Endotoxins	≤0.5 EU/mg	<0.05 EU/mg

For Research Use Only - Not for Human Consumption