Description
TB4 / TB-500 (thymosin beta) is a lyophilized peptide reagent for in-vitro laboratory work, held here alongside the rest of our research peptides in Canada and shipped cold and tracked from within the country. It is intended for qualified researchers, university labs and biotech groups running benchtop or cell-based studies — not for human or veterinary use in any form.
Overview
Thymosin beta-4 is a small, naturally occurring actin-sequestering peptide, and TB-500 is the name commonly attached to the synthetic material and fragment chemistry associated with it in research supply. It is supplied here as a sterile-filled lyophilized powder in a sealed vial, ready to be reconstituted in a suitable research solvent at the concentration your protocol calls for. Choose 10 mg or 20 mg per vial, as a single unit or in a box of ten where a study runs long enough that batch consistency across vials matters. Each order ships with access to the certificate of analysis matched to the batch you actually received — not a representative document from an earlier lot.
What it is known for
Buyers come to this listing for two things: independent verification and Canadian logistics. The purity and identity data come from Janoshik, an outside analytical lab, rather than from an in-house claim, so the number on the COA was produced by someone with no stake in the sale. And because the material is held and dispatched inside Canada, it does not sit in customs or spend days at ambient temperature crossing a border before it reaches your bench.
Key features
- Lyophilized powder format — Freeze-dried peptide is far more stable in transit and storage than a solution, and it lets you set your own reconstitution volume and working concentration rather than accepting a fixed one.
- HPLC purity testing on every batch — High-performance liquid chromatography separates the target peptide from truncated sequences and process residues, so you know what proportion of the vial is the compound you intend to study — the single largest source of unexplained variance in peptide work.
- Mass spectrometry identity confirmation — MS confirms the molecular weight matches the intended sequence. Purity alone tells you a sample is clean; identity tells you it is clean and correct.
- Third-party analysis by Janoshik — An independent lab has no commercial reason to round a result upward. If your work will be written up or reviewed, externally generated data is easier to stand behind.
- Batch-matched certificate of analysis — The COA corresponds to the specific lot in your hands, which is what documentation and reproducibility actually require.
- 10 mg and 20 mg fills — Match vial size to experiment size. Smaller fills reduce waste and repeated freeze-thaw on a short study; 20 mg suits higher-concentration or longer protocols.
- Boxes of ten — Ten vials drawn from the same production run keep your reagent consistent across a full study, removing lot-to-lot variation as a confounding variable.
- Cold storage and tracked Canadian dispatch — The vial is kept cold before it ships and moves on a tracked domestic service, so you can plan the day it arrives and get it into the freezer without a customs delay in between.
Benefits
- You can verify what you are working with before you open the vial, using data from an outside lab.
- Domestic shipping means shorter transit and no cross-border hold-ups for temperature-sensitive material.
- Choosing between single vials and boxes of ten lets you buy to the size of the study rather than to a fixed pack.
- Lyophilized supply puts reconstitution concentration under your control.
- Same-lot boxes remove reagent variability as an explanation for inconsistent results.
- Discreet, tracked delivery with a known arrival window makes receiving and storing the material straightforward.
Specifications
| Detail | Value |
|---|---|
| Product | TB4 / TB-500 (thymosin beta), research reagent |
| SKU | PP-TB4TB500THYMOSIN |
| Category | Recovery & Repair |
| Format | Lyophilized powder in sealed vial, for reconstitution |
| Sizes | 10 mg (1 vial), 10 mg (box of 10), 20 mg (1 vial), 20 mg (box of 10) |
| Purity testing | HPLC |
| Identity testing | Mass spectrometry |
| Testing lab | Janoshik, independent third party |
| Documentation | Batch-matched certificate of analysis available |
| Handling | Stored cold; shipped cold and tracked from Canada |
| Intended use | In-vitro laboratory research only |
Typical applications
- In-vitro assay work in laboratory and university research settings
- Cell-based studies within a controlled research protocol
- Reference or comparator material where an externally verified purity and identity profile is required
- Method development and analytical work requiring a documented lyophilized peptide input
Important information
- Research use only. This is not a drug, supplement, food or cosmetic. It is not intended to diagnose, treat, cure or prevent any disease, and it is not for human or veterinary use, ingestion or administration.
- Keep the vial cold and sealed until you are ready to reconstitute; return it to cold storage promptly on arrival.
- Reconstitute in a solvent appropriate to your protocol, and let your own method — not a generic figure — determine concentration.
- Peptides are sensitive to repeated freeze-thaw cycles. Plan aliquoting before you reconstitute rather than after.
- Request the certificate of analysis for your batch and check that the lot number on the document matches the vial.
- Confirm which size and pack you have selected before ordering; 10 mg and 20 mg fills are supplied singly or in boxes of ten.
Common questions
What does third-party tested actually mean here?
Samples from each batch are sent to Janoshik, an independent analytical laboratory, which runs HPLC for purity and mass spectrometry for identity. The results are not generated in-house, and the certificate of analysis you receive corresponds to the batch you were shipped.
Should I buy single vials or a box of ten?
Single vials suit short studies or a first evaluation of the material. A box of ten gives you vials from the same run, which is worth it when a protocol extends over weeks and you need the reagent to be identical from the first experiment to the last.
What is the difference between 10 mg and 20 mg?
Only the quantity of lyophilized peptide in the vial. The 20 mg fill lets you prepare a higher-concentration stock or more working volume from a single reconstitution; the 10 mg fill reduces material sitting unused if your study is small.
How is it shipped, and where from?
From within Canada, kept cold and sent on a tracked, discreetly packaged domestic service. Staying inside the country avoids the customs delays that are hardest on temperature-sensitive reagents.
How do I get the certificate of analysis?
A batch-matched COA is available for the lot you receive. Match the lot number on the document to the one on the vial before you begin work, and keep the file with your study records.
Can this be used on people or animals?
No. It is supplied strictly for in-vitro laboratory research by qualified buyers, and is not approved or intended for human or veterinary use in any form.
In summary
A lyophilized TB4 / TB-500 reagent with independent HPLC purity and MS identity data behind it, offered in 10 mg and 20 mg vials individually or in same-lot boxes of ten, and dispatched cold and tracked from within Canada. Choose your size, request the batch COA, and store it cold on arrival.
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