TB-500 10 mg (Pen)

TB-500 10 mg (Pen) is the pre-filled pen presentation of Revitalized Research’s TB-500 listing: one pen holds a 10 mg fill of the same peptide sold in the vial. The batch certificate behind it identifies that peptide as full-length thymosin beta-4, the 43-residue acetylated actin-binding protein.^{6940133, 16099219} This page is about the pen format itself: what the fill is, how handling changes compared with a dry vial, and what the certificate card on this listing does and does not cover. Supplied for qualified laboratory research only.

Research reagent identity

Sellers use the name TB-500 for two different things: the whole 43-residue thymosin beta-4 and a short acetylated fragment, Ac-LKKTETQ, that analytical chemists have found in some products sold under that name.^{22962027, 23084823} The lot shown on this pen’s card carries the full-length peptide’s CAS number, formula and PubChem CID.

Research literature

The material on this listing is identified on its certificate as full-length thymosin beta-4, a 43-residue actin-sequestering peptide. Its actin-binding biochemistry is described in the primary literature. This listing is the pre-filled pen format. Primary sources are linked below for researchers who need the original papers. This listing does not summarise study outcomes and makes no claim about any effect, use or benefit of this product, which is supplied as a reference material for in vitro laboratory research only.

References (PubMed): PMID 10469335, PMID 16099219, PMID 25204972, PMID 20126456, PMID 15565145, PMID 14657002, PMID 26098610

Batch documentation

The certificate card on this listing is titled TB-500 10 mg (Pen). It shows batch RRL-8408241-P, purity 99.34%, date 09 JUL 2026, lab horizonanalytical.com. That is the same lot number shown on the TB-500 vial page. The report images behind the card describe a UPLC-MS purity analysis of a white lyophilized powder at a 10 mg specification, plus an endotoxin result of <0.05 EU/mL marked Pass.

In other words, the card documents the peptide lot, not the filled pen. Match the lot printed on the pen label with the card before use, and contact support if a protocol requires records specific to the filled pen. Certificates across the range are listed in the COA library, and the walkthrough on verifying a peptide COA explains how to confirm a report number with the testing lab. Batch certificates are posted when available.

Storage and handling

The handling differences come from the format. A sealed vial of dry powder tolerates storage well until the lab chooses to reconstitute it. A pen arrives already prepared, so cold storage starts at delivery. Refrigerate pens on receipt, keep them upright in a labelled rack out of light, keep them off freezer plates, and log the arrival date next to the lot number. Do not mix pens from different lots in the same slot. Labs that prefer to prepare their own solutions can use the vial with reconstitution solution, sold separately. The other pen-format listings are gathered on the research peptide pens page, the BPC-157 vs TB-500 in research article covers both compounds, and peptide storage basics for research labs covers general practice.

Frequently asked questions

Is the pen the same peptide as the TB-500 vial?

Yes. The certificate card on this pen shows lot RRL-8408241-P, the same lot shown on the TB-500 vial page, and that certificate identifies the material as full-length thymosin beta-4 (CAS 77591-33-4, PubChem CID 16132341). Only the presentation differs.

Why does the pen certificate describe a lyophilized powder?

The posted report covers the peptide lot, tested as a white lyophilized powder at a 10 mg specification. It does not describe the filled pen itself, so ask support for fill-specific records if a protocol requires them.

How much material does one pen contain?

Each pen on this listing is a 10 mg fill of the peptide. Confirm the strength and lot on the pen label when it arrives and record both in the lab log.

How should the pen be stored after delivery?

Refrigerate it on arrival, keep it upright and away from light, and avoid freezing or repeated warming. A prepared format calls for tighter temperature control than a sealed dry vial, so follow the label and your institution’s procedures.

Research framing: Supplied strictly for laboratory and in-vitro research use only. Not for human or veterinary use.

For research use only. Not for human or animal consumption, administration, injection, topical use, medical, clinical, veterinary, food, cosmetic, supplement, household, or other personal use. This site does not provide medical advice, and this product is not intended to diagnose, treat, cure, mitigate, or prevent any disease. These statements have not been evaluated by the Food and Drug Administration. Review the available COA or batch documentation and follow applicable laws, institutional protocols, and safety procedures before handling.

COA documentation is organized by product and batch whenever available.

Store and handle according to the product label, batch documentation, and laboratory protocol.