Peptide fragments & analogues
TB-500
Thymosin beta-4 fragment
- Third-party lab tested
- 99%+ purity on tested lots
- Certificate per size
A synthetic fragment of the naturally occurring peptide thymosin beta-4. Supplied as a lyophilized powder for laboratory research use.
Analytical specification (10 mg)
Kovera Labs · 2026-08-09
- Purity
- 99.634%
- Net content
- 10.86 mg (labeled 10 mg)
- Method
- RP-HPLC / LC-MS
- Endotoxin
- Pass (≤0.5 EU/mL)
- Heavy metals
- Not detected (As, Cd, Pb, Hg)
- CAS
- 77591-33-4
- Formula
- C212H350N56O78S
- Mol. weight
- ~4963 g/mol
- PubChem CID
- 16132341
- Lot
- 40-202608-51
Store lyophilized at -20°C, protected from light.
1 × 10 mg: $70.00
- Lab certificates posted per lot
- Ships via USPS with tracking
- Replies within one business day
Specification guarantee. If what you receive does not match the specification on this page, we replace it or refund it. Terms
Research use only
This product is supplied strictly for laboratory research use. It is not a drug, food, cosmetic, or dietary supplement, and is not for human or veterinary consumption. Beyond Peptides provides no dosing guidance, protocols, or medical advice.
Adding to cart does not charge you. After you submit your order, you pay by Venmo, Zelle or Cash App from the confirmation page, then it ships via USPS.
About TB-500
TB-500 is a synthetic peptide related to thymosin beta-4, a naturally occurring N-terminally acetylated peptide of 43 amino acids. The listed CAS number is 77591-33-4, with formula C212H350N56O78S (approximately 4963 g/mol).
It is supplied as a lyophilized powder in 10 mg vials. Store it lyophilized at -20°C, protected from light. A certificate of analysis is posted for each size as its lot is tested, and the size table on this page shows which sizes have one. It is sold for laboratory research use only and is not for human or veterinary use.
TB-500 sizes and specifications
TB-500 is supplied as 10 mg for laboratory research use only.
| Size | Price | Availability | Purity and method | Lot | Certificate |
|---|---|---|---|---|---|
| 10 mg10.86 mg (labeled 10 mg) | $70.00 | In stock | 99.634%RP-HPLC / LC-MS | 40-202608-51 | View certificateKovera Labs, 2026-08-09 |
Identification and handling
- CAS number
- 77591-33-4
- Molecular formula
- C212H350N56O78S
- Molecular weight
- ~4963 g/mol
- PubChem CID
- 16132341
- Storage
- Store lyophilized at -20°C, protected from light.
Ordering and documentation
- You pay by Venmo, Zelle or Cash App after submitting your order, and it ships via USPS. Shipping and payment
- How purity is measured and what a certificate of analysis shows: Testing and COAs
- Approved wholesale accounts get wholesale pricing on 10 or more bottles of one size. Wholesale
- Common questions about ordering, payment and shipping: FAQ
TB-500 questions
What is TB-500?
TB-500 (Thymosin beta-4 fragment) is listed under peptide fragments & analogues and supplied as 10 mg for laboratory research use only. A synthetic fragment of the naturally occurring peptide thymosin beta-4. Supplied as a lyophilized powder for laboratory research use. It is not for human or veterinary consumption.
Is there a certificate of analysis for TB-500?
Yes, for 10 mg (99.634%, Kovera Labs). Each certificate is linked on this page for its own size and lot.
What form is TB-500 supplied in?
TB-500 is supplied as a lyophilized (freeze-dried) powder in a sealed vial. Each size states its measured net content where its lot has been tested.
How should TB-500 be stored?
Store lyophilized at -20°C, protected from light.
How does ordering and shipping work?
Add TB-500 to your cart and submit your order; nothing is charged online. Your confirmation page shows your total, which you pay by Venmo, Zelle or Cash App. Once payment is matched to your order it ships via USPS with tracking, to addresses in the United States only.
Who can buy TB-500?
Adults 21 or older buying for lawful laboratory research. Every order carries the research-use, age and terms acknowledgments at checkout, and ships only to addresses in the United States.
Can I return TB-500?
Because these are research materials, we cannot accept returns once an order has shipped. If a product does not match the specification stated on its product page, contact us immediately and we will replace it or refund it.
