15% fall discount applied automatically at checkoutFree USA shipping over $100Free worldwide shipping over $200Credit/debit checkout disabled for updates
Sign in 0

Public results

Published lot certificate Issued by PrymaLab Analytical for a PrymaLab production lot. Scan the QR code or enter the number and key on the verify page to confirm any printed copy.
Download PDF
PrymaLab
PrymaLab AnalyticalCertificate of Analysis · Lot release · tested in-housePrymaLab Analytical · Attn: Sample intake · 3705 Music Branch Rd · Ashland, KY 41102 · United States
Certificate number PL-26-00101 Key FFRYK68V Verify at prymalab.net/testing/verify/

TB-500 (Thymosin β4) 5 mg Lot PL-2609-101 · analysed September 19, 2026 · issued October 3, 2026

Purity · RP-HPLC99.74%Specification 99.0% • main peak at 6.08 min
Identity · Observed Mass4963.7 DaTheoretical 4963.5 Da • +0.2 Da (40 ppm)
ConclusionPASSMeets every specification for the tests performed

The certificate

Certificate of analysis PL-26-00101, page 1
Page 1: results, specifications and chromatogram
Certificate of analysis PL-26-00101, page 2
Page 2: HPLC method, peak table, mass spectrometry and approval

Summary

CompoundTB-500 (Thymosin β4)
N-acetyl thymosin β4, full-length 43-residue peptide
CAS number77591-33-4
Molecular formulaC212H350N56O78S
Theoretical mass4963.5 Da
Sequence / structureAc-SDKPDMAEIEKFDKSKLKKTETQEKNPLPSKETIEQEKQAGES-OH (43 residues; N-acetyl; free C-terminus)
AppearanceWhite lyophilized powder
Storage−20 °C, desiccated, dark
Label claim5 mg/vial
Lot numberPL-2609-101
Certificate numberPL-26-00101
Date of analysis2026-09-19 (retest 2028-09-18)
Purity (RP-HPLC)99.74%
Identity (LC-MS)4963.7 Da
Water content (KF)1.8%
Endotoxin (LAL)0.06 EU/mg
SterilityNo growth; conforms
ConclusionPASS
Tested byPrymaLab Analytical (PrymaLab's own laboratory, Ashland, KY). In-house result, not an independent third-party test.
Third-party testing guarantee. Have this product tested by any independent laboratory. If the result does not come back as the compound named on the label, at the purity and amount stated, we refund your order in full and reimburse the cost of the test. Email the lab report and your order number to michael@prymalab.net.

View the product Download the PDF Print-ready certificate Verify another certificate All PrymaLab lot certificates