What Is C152H252N44O42?
C152H252N44O42 is the molecular formula for the 43-amino-acid peptide commonly called TB-500, and it simply counts the atoms in one molecule — 152 carbon, 252 hydrogen, 44 nitrogen and 42 oxygen atoms. People search the formula directly when they want to confirm the identity or molecular weight of a sample rather than trusting a trade name.
The formula is shared by TB-500 and its parent protein fragment thymosin beta-4(1-43), because the two names refer to the same 43-residue sequence in research literature.
Deriving the Molecular Weight
The molecular weight of TB-500 is approximately 4963 daltons, calculated by summing the atomic masses of the 480 atoms in C152H252N44O42. Knowing this exact mass lets a mass spectrometer confirm the molecule is present and intact rather than degraded.
A mass-spec peak near 4963 Da (or its multiply-charged equivalents) is what a legitimate COA reports alongside HPLC purity — see our purity vs mass-spec guide.
Why the Formula Is a Verification Tool
Because the formula is fixed, a COA that lists a different molecular weight or formula for “TB-500” is a sign the product is mislabeled or a different peptide entirely. Cross-checking the stated formula against the expected C152H252N44O42 is one of the fastest identity checks a researcher can run before opening a vial.
For how this fits into batch testing, see our HPLC report guide.
Comparing TB-500 to Other Peptides by Formula
Each research peptide has a unique formula, and comparing them shows why identity confirmation matters — for example BPC-157 is a much shorter 15-amino-acid sequence, while Tirzepatide is a far larger synthetic molecule. No two peptides share a formula, so the formula itself is a fingerprint.
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Frequently Asked Questions
Q1: What is the molecular formula of TB-500?
C152H252N44O42 — 152 carbon, 252 hydrogen, 44 nitrogen and 42 oxygen atoms per molecule.
Q2: What is the molecular weight of TB-500?
Approximately 4963 daltons, derived by summing the atomic masses of the atoms in C152H252N44O42.
Q3: Why would someone search the formula instead of the name?
To verify molecular identity and weight directly, since a formula is unique to one molecule while a trade name can be ambiguous.
Important: All products are sold strictly for laboratory and research purposes only — not for human or veterinary use. No medical, therapeutic, or dosing guidance is provided or implied. Researchers are responsible for compliance with their institution and local regulations.