Verified — all release criteria met
released
Certificate of analysis
TB-500
Lot CP-TB500-2605B · 10 mg
99.18 %
HPLC purity
Spec ≥ 99.0 %
85.7 %
Net peptide content
By amino acid analysis
< 0.72
Endotoxin (EU/mg)
Spec < 5.0 EU/mg
Provenance
- Testing laboratory
- Colmaric Analyticals
- Accreditation
- ISO/IEC 17025:2017
- Country of synthesis
- United States
- Manufactured
- May 4, 2026
- Release tested
- May 13, 2026 (5 months ago)
- Retest date
- May 3, 2028
- CAS number
- 77591-33-4
- Molecular formula
- C37H67N9O12
- Theoretical mass
- 861.99 Da
- Observed mass (LC-MS)
- 862.31 Da (Δ 0.32 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.
| Method | Parameter | Specification | Result | |
|---|---|---|---|---|
| RP-HPLC (UV 214 nm) | Purity (area %) | ≥ 99.0 % | 99.18 % | Pass |
| LC-MS (ESI+) | Identity — observed mass | 861.99 ± 1.0 Da | 862.31 Da | Pass |
| Amino acid analysis | Net peptide content | ≥ 80.0 % | 85.7 % | Pass |
| Karl Fischer | Water content | ≤ 8.0 % | 4.22 % | Pass |
| Ion chromatography | Residual TFA | ≤ 1.0 % | 0.15 % | Pass |
| LAL kinetic chromogenic | Bacterial endotoxin | < 5.0 EU/mg | < 0.72 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.