TB-500

Lot CP-TB500-2606A · 5 mg

99.65 %

HPLC purity

Spec ≥ 99.0 %

84.5 %

Net peptide content

By amino acid analysis

< 0.61

Endotoxin (EU/mg)

Spec < 5.0 EU/mg

Provenance

Testing laboratory: Colmaric Analyticals
Accreditation: ISO/IEC 17025:2017
Country of synthesis: United States
Manufactured: Jun 15, 2026
Release tested: Jun 24, 2026 (3 months ago)
Retest date: Jun 14, 2028
CAS number: 77591-33-4
Molecular formula: C37H67N9O12
Theoretical mass: 861.99 Da
Observed mass (LC-MS): 862.34 Da (Δ 0.35 Da)

Assay results

Every line the release panel ran for this lot, with the method, the acceptance criterion and the measured value — not a pass mark alone.

Certificate of analysis — assay results
Method	Parameter	Specification	Result
RP-HPLC (UV 214 nm)	Purity (area %)	≥ 99.0 %	99.65 %	Pass
LC-MS (ESI+)	Identity — observed mass	861.99 ± 1.0 Da	862.34 Da	Pass
Amino acid analysis	Net peptide content	≥ 80.0 %	84.5 %	Pass
Karl Fischer	Water content	≤ 8.0 %	2.69 %	Pass
Ion chromatography	Residual TFA	≤ 1.0 %	0.22 %	Pass
LAL kinetic chromogenic	Bacterial endotoxin	< 5.0 EU/mg	< 0.61 EU/mg	Pass
USP <71> membrane filtration	Sterility	No growth	No growth	Pass
Visual / USP <790>	Appearance	White to off-white cake, free of visible particulates	Conforms	Pass

Sequence

Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln-OH

Handling for this lot

Appearance: White lyophilised powder
Storage: -20 °C lyophilised; 2–8 °C reconstituted
Reconstitution: Dissolves rapidly. The N-terminal acetyl group is confirmed by mass on every lot — un-acetylated material is a common substitution.

Other lots of TB-500

Compare batch to batch. Consistency across lots is a stronger signal than any single certificate.

Research use only. This certificate describes material supplied strictly for laboratory research. It is not a drug, food, cosmetic or medical device, has not been evaluated by the FDA, and is not intended for human or veterinary administration of any kind.