Certificate of Analysis

TB-500 (Thymosin β4 frag.)

Batch OP-2405-C · 5 mg lyophilized powder

Third-party verified

HPLC PURITY ANALYSIS · TB-500 (Thymosin β4 frag.)RP-HPLC / ESI-MS

Purity (HPLC)

99.1%

Batch

OP-2405-C

Tested

2026·05·22

Document details

Tested byJanoshik Analytical (independent)

MethodRP-HPLC / ESI-MS

Released2026·05·24

Presentation5 mg lyophilized powder

FormulaC212H350N56O78S

Mol. weight4963.49 g/mol

SequenceAc-Ser-Asp-Lys-Pro-Asp-Met-Ala-Glu-Ile-Glu-Lys-Phe-Asp-Lys-Ser-Lys-Leu-Lys-Lys-Thr

This is the COA for the exact batch we ship. We re-test every lot and publish the result before it goes on sale — no stock photos, no borrowed certificates.

Release test panel

Test	Result	Specification	Status
Appearance	White to off-white lyophilized powder	White / off-white powder	Pass
Identity (ESI-MS)	Found 4963.4 — Conforms	Conforms to reference	Pass
Purity (RP-HPLC, UV 214 nm)	99.1%	≥ 98.0%	Pass
Single max. impurity	< 0.5%	≤ 1.0%	Pass
Water content (Karl Fischer)	4.1%	≤ 8.0%	Pass
Acetate content (IC)	6.3%	≤ 15.0%	Pass
Bacterial endotoxin (LAL)	< 5 EU/mg	< 10 EU/mg	Pass

Research use only. Not for human or veterinary use, not a drug, and not intended to diagnose, treat, cure, or prevent any disease. COA reflects the tested batch; store lyophilized peptide cold and reconstitute per the included guide.