TB10 — TB-500 10mg
$
Research Overview
TB-500 (CAS 885340-08-9) is a synthetic peptide corresponding to the actin-binding region of thymosin β4, not the full 43-residue protein. That distinction matters and is often blurred in supplier listings: thymosin β4 is the endogenous actin-sequestering protein, while TB-500 is the short active fragment built around the conserved LKKTETQ motif, which is what most of the published fragment work uses.
The peptide is highly water-soluble and contains no cysteine, so it forms no disulfide bridge and is comparatively forgiving to handle. It appears both as a standalone reference material and as a component of multi-peptide blends such as BB20 and KLOW, where it is quantified separately from the other components.
Analytical summary — lot TB-260724
- Compound: TB-500 (thymosin β4 active fragment)
- CAS number: 885340-08-9
- Content: 10.94 mg / 11.01 mg / 10.60 mg
- Purity: 99.31–99.39% by HPLC
- Presentation: 10mg × 10 vials, lyophilised
Lot and presentation
This listing is supplied as 10mg × 10 vials, lyophilised powder in sealed vials. The current lot is released at 99.3%+ chromatographic purity, against an independent Janoshik certificate of analysis (lot TB-260724) reporting mass by HPLC-UV against a reference standard. Peptide content and purity are reported separately because they measure different things — content is how much material is in the vial, purity is what fraction of that material is the target sequence.
Handling and storage
Lyophilised material tolerates ambient temperature in transit but should be moved to -20°C on arrival for long-term storage, protected from light and moisture. Allow a vial to reach room temperature before opening so that condensation does not settle on the powder. Once reconstituted, material of this class is normally held at 2-8°C and used within a short window; repeated freeze-thaw cycles degrade it.
Research use only
This material is supplied strictly for in-vitro laboratory research and analytical reference use by qualified professionals. It is not a drug, not a dietary supplement and not a cosmetic. It is not intended for human or veterinary use, for diagnostic purposes, or for administration to any living organism. Nothing on this page describes an effect in humans.
Lab results
Janoshik report #212960 · Lot TB-260724 · Analysed 7 August 2026
| TB-500 (TB-4) | 10.94 mg / 11.01 mg / 10.60 mg |
|---|---|
| Purity | 99.380% / 99.389% / 99.313% |
| Endotoxin | 1.597 EU/vial · report #212961 |
Testing is ordered by the manufacturer that produces this lot, so the laboratory names the manufacturer as its client rather than BMS Labs; the report is published unchanged. The endotoxin figure is a contamination measure only — it is not a sterility result and does not indicate suitability for use in a living organism.
Questions about this lot
- Does this lot come with a certificate of analysis?
- Yes. The lot currently shipping was analysed by Janoshik Analytical as lot TB-260724 under report number 212960, analysed 7 August 2026. The figures are published on this page exactly as the laboratory reported them, and the report can be looked up at the laboratory itself.
- What purity does the report show?
- The report gives 99.380% / 99.389% / 99.313% by HPLC, measured on separate vials from the same lot. Purity describes what fraction of the material is the target compound; content, reported separately above, describes how much material is in the vial.
- Can I verify the report myself?
- Yes. Every report on this site links to the laboratory's own record, so the figures can be checked against Janoshik rather than against us. Our guide on verifying a Janoshik report explains which fields to compare.
- What does the endotoxin figure mean?
- Endotoxin is a measure of bacterial contamination in that lot, reported here as 1.597 EU/vial from a separate analysis with its own report number. It is not a sterility result and does not make the material suitable for use in a living organism.
- How should this material be stored?
- As supplied, the lyophilised powder is kept cold, sealed, dry and out of the light, and the vial is allowed to reach room temperature before it is opened, so that moisture does not condense on the cold solid. Our storage and handling guide covers the details.
- How and when does it ship?
- Orders ship from our US warehouse on the next business day after payment is confirmed on-chain, by USPS, within the United States only. US shipping is free with no minimum order, and typical transit time is three to seven business days.
- What is this material sold for?
- Laboratory and analytical research use only. It is not a medicine, not a supplement, and not for human or veterinary use. Orders are accepted on that basis.
Laboratory Disclaimer
This compound is strictly for laboratory research use only. Not for human consumption, veterinary use, or therapeutic applications. Handle with extreme caution and follow all safety protocols.