TB-500
A synthetic fragment of thymosin β-4, an actin-binding protein. Studied in cytoskeletal and tissue research.
What is tested, and what each test answers
Every batch runs the full panel. Nothing ships on a partial result.
- HPLC
- PuritySeparates everything in the sample. One compound, one peak. That peak measured against everything else is the purity figure.
- LC-MS
- IdentityWeighs the molecule. Every peptide sequence has a mass nothing else shares — this confirms the vial holds the compound on the label.
- Net peptide content
- QuantityWhat the vial actually weighs out at, against the stated amount. A vial can be perfectly pure and still be short.
- Endotoxin
- ContaminationFragments of bacterial cell wall left over from manufacture. They survive sterilisation and a purity test does not see them.
Certificate of Analysis
Published, not promised.
Every batch of TB-500 ships with a Certificate of Analysis carrying the HPLC chromatogram, LC-MS identity, net peptide content and endotoxin result — plus the laboratory's own name and sample ID, so you can verify it with the lab rather than with us.
Certificates are published on the Verification page and are viewable with a free research account. They are never emailed, and there is no code on the vial.
How TB-500 is held
GMP-certified facility
Produced under Good Manufacturing Practice conditions and manufactured in the USA — no overseas outsourcing.
Independently tested
Independent third-party laboratories confirm purity and identity on every batch.
Batch-tested and documented
Every compound ships from a single tested batch, with its Certificate of Analysis published on our Verification page.
Documented to ≥99% purity
Held to a ≥99% HPLC purity specification, with batch Certificates of Analysis published on our Verification page.
Pricing and the rest of the catalog
Account required.
Pricing, availability and the full catalog are open to verified researchers. Creating an account is free and takes a minute; it also opens every published Certificate of Analysis.