Chemistry reference

TB-500 thymosin beta-4 fragment formula and molecular weight

Identifiers for TB-500 from PubChem CID 62707662. Laboratory handling notes below are general lyophilized-peptide documentation practices, not a protocol.

Catalog name	TB-500
PubChem title	Unii-qhk6Z47gtg
Verified synonyms	Unii-qhk6Z47gtg; TB500; TB-500; N-Acetyl-L-leucyl-L-lysyl-L-lysyl-L-threonyl-L-alpha-glutamyl-L-threonyl-L-glutamine
PubChem CID	62707662
CAS number	885340-08-9
Molecular formula	C38H68N10O14
Molecular weight	889.0
Monoisotopic mass	888.49164688
Sequence	Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln-OH

PubChem titles this CID as Unii-qhk6Z47gtg. TB-500 is a trade name for a thymosin beta-4 fragment; this page only reports identifiers from that CID and does not invent additional chemical details.

Laboratory handling

Lyophilized peptide storage notes

Keep lyophilized vials dry, cold, and protected from light according to the laboratory SOP.
Limit moisture exposure when opening containers; record open date and storage location with the lot file.
Retain the matching COA, stated fill, and identity evidence with the material record.
Solvent choice, reconstitution math, and aliquot labeling belong in the laboratory notebook, not as personal-use guidance.