TB-500 (10mg)
TB-500 (thymosin β4) — 10 mg, lyophilized.
Same-day courier across the SF Bay Area; FedEx 2Day nationwide.
For Laboratory Research Use Only — not for human or animal consumption. 21+. Full terms of sale below.
Compound data
| Compound | Thymosin β4 (sold as TB-500) |
|---|---|
| Sequence | Ac-Ser-Asp-Lys-Pro-Asp-Met-Ala-Glu-Ile-Glu-Lys-Phe-Asp-Lys-Ser-Lys-Leu-Lys-Lys-Thr-Glu-Thr-Gln-Glu-Lys-Asn-Pro-Leu-Pro-Ser-Lys-Glu-Thr-Ile-Glu-Gln-Glu-Lys-Gln-Ala-Gly-Glu-Ser-OH |
| CAS No. | 77591-33-4 |
| Molecular formula | C212H350N56O78S |
| Molecular weight | 4963.4 g/mol |
| Compound family | β-Thymosin peptides — N-acetylated, 43 residues |
| Supplied as | 10 mg, lyophilized |
| Storage | Sealed vial, lyophilized: −20 °C for long-term storage; 2–8 °C for short-term storage. Protect from light and moisture; keep desiccated. |
| Handling | Allow the sealed vial to reach room temperature before opening to avoid condensation. For laboratory use only, by trained personnel with appropriate personal protective equipment, in a controlled laboratory setting. |
N-terminally acetylated; 43 residues.
Certificate of analysis
| Lot | 12463 |
|---|---|
| Laboratory | Freedom Diagnostics LLC — independent third-party laboratory |
| Identity (LC-MS) | Confirmed |
| Purity (HPLC-UV) | ≥99% |
| Net content | 9.52 mg |
| Appearance | White lyophilized powder |
| Tested | Received October 5, 2026 · reported October 6, 2026 |
| Search code | SFBa2610050831 |
View certificate (PDF) Verify at Freedom Diagnostics
To verify this report, open Freedom Diagnostics’ COA Lookup, enter search code SFBa2610050831 and click Look up. The lab returns its own copy from its own server (direct link), and the QR code on the certificate opens the same file. Then check that the lot number matches the label on your compound. All lab reports.
Further information
We do not publish descriptions of this compound’s properties or activity. Researchers seeking information about this compound, and about the research being conducted with it, should consult primary sources: government scientific and regulatory agencies, accredited institutions of higher education, and established research institutions.
Restricted use
SF Bay Area Peptides does not condone or permit the sale of this product for human or animal consumption. It is sold only to purchasers acquiring it for legitimate laboratory research, who are expected to have the training and facilities to handle, store and dispose of it appropriately.
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Terms of sale & research-use declaration
For Laboratory Research Use Only (RUO) — Not for Human or Animal Consumption. Not for distribution. Must be 21+ to purchase. This product is sold strictly for in-vitro laboratory research and analytical use. It is not a drug, food, dietary supplement, cosmetic or medical device; it has not been evaluated or approved by the U.S. Food and Drug Administration; and it is not intended to diagnose, treat, cure, mitigate or prevent any disease. It is not manufactured, tested or released as a sterile or pharmaceutical-grade product, must not be introduced into humans or animals by any means, and must not be used in clinical, diagnostic, therapeutic, veterinary, food or cosmetic applications. SF Bay Area Peptides is a research-chemical supplier — not a pharmacy, compounding pharmacy or outsourcing facility — and provides no medical, dosing or preparation advice. Sales are limited to qualified researchers and licensed laboratories; purchasers must be 21 years of age or older and qualified to handle research chemicals. By purchasing, you represent that you are acquiring this product solely for lawful laboratory research; accept all risks of its handling, storage, use and disposal; are responsible for complying with all applicable laws and regulations; will not resell or supply it for human or animal use; and agree to our Terms & Conditions, including the assumption of risk, disclaimer of warranties, limitation of liability and indemnification provisions. We may refuse or cancel any order where we have reason to believe a product may be misused.
Cancellations, non-delivery, damaged or incorrect shipments and refunds are handled under our Refund, Return & Cancellation Policy.
Shipping & Delivery
All orders are paid in full at checkout by credit or debit card (Visa, Mastercard or American Express) or Venmo. Orders confirmed before 12:00 p.m. Pacific on a business day are dispatched that afternoon. Orders confirmed after noon, or on a weekend or holiday, go out on the next business day.
San Francisco Bay Area: same-day delivery by local courier. The courier fee is set by city — from $19.95 in San Francisco — and is shown at checkout once you enter your address. We text you to agree a delivery window. Someone must be available to receive the package; if a second courier trip is needed, that trip is charged to you. First-time customers may be asked to show a government-issued photo ID confirming they are 21 or older.
Everywhere else in the United States: FedEx 2Day® at a flat $19.99 per order, with a tracking number sent by email or text once FedEx accepts the package. We do not ship outside the United States.
If an item arrives damaged, incorrect or missing, tell us within 48 hours of delivery. Full terms are in our Shipping & Delivery Policy and Refund, Return & Cancellation Policy.
All products are supplied for laboratory research use only — not for human or animal consumption. Purchasers must be 21 or older.
For Laboratory Research Use Only. Not for Human or Animal Consumption. Not for distribution. Must be 21+ to purchase.
