Best-selling peptides TB500(Thymosin B5 Acetate )5mg 10mg 885340-08-9
36 Inquiries
885340-08-9
Pharmaceutical Grade
99%
shenzhen
10 vials /box
2027-09-01
Retatrutide
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Product Description
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Seller Information
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Inquiry History
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DescriptionECHEMI Editorial ReferenceTB 500 is a synthetically made version of TB4 that facilitates healing and recovery by helping build new blood vessels, muscle tissue fibers, blood cells, and facilitating cell migration. It acts on the muscular system and has anabolic properties. TB 500 is used primarily for race animals (horses and dogs).Basic Info
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Product Name:
TB500
Other Name:TB500 fragment;L-Glutamine, N-acetyl-L-leucyl-L-lysyl-L-lysyl-L-threonyl-L-α-glutamyl-L-threonyl-;Thymosin Beta 4 Peptide Peptides Tb500 2mg/Vials 5mg/Vials;TB500 fragment acetate;TB500 Thymosin Beta 4 (TB4);Ac-LKKTETQ;Thymosin β4 TB500;TB500(Thymosin B4 AceTate) 5MG 10MG
CAS No.:885340-08-9
Molecular Formula:C38H68N10O14
InChIKeys:ADKDNDYYIZUVCZ-HLXZCORBNA-N
Molecular Weight:889.02
EC Number:232-660-2
Color/Form:White to Off-White
Categories:
Characteristics-
Density:
1.281±0.06 g/cm3(Predicted)
Boiling Point:1405.0±65.0 °C(Predicted)
PKA:3.20±0.10(Predicted)
Research-
Class:
Actin-sequestering protein / 43-amino-acid peptide
Status:Research compound — Not FDA approved (investigational: RGN-259 for dry eye / neurotrophic keratitis)
Mechanism:A naturally occurring 43-amino-acid peptide (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) that binds G-actin (sequesters monomeric actin), preventing F-actin polymerization. Promotes cell migration, angiogenesis, wound healing, and anti-inflammatory responses via integrin-linked kinase (ILK) and HIF-1α/VEGF pathways. TB-500 is the synthetic fragment Ac-LKKTETQ (MW ~895) often sold under this CAS.
Activity note:Thymosin Beta-4 is an actin-binding protein, not a receptor agonist. Functional activity is measured by actin sequestration (Kd ~0.7–1 μM) and cell migration assays, not EC₅₀.
Source:Goldstein AL, et al. Vitam Horm. 2003;66:257–296. RegeneRx RGN-259 clinical program.DOI
Clinical Development:
References-
DrugBank:PubChem:UNII:Disclaimer:
Thymosin Beta-4 (TB-500) is NOT FDA-approved for human therapeutic use. RGN-259 (Tβ4 ophthalmic solution) is an investigational drug not yet approved. TB-500 sold on research-chemical marketplaces is a synthetic fragment and is not an approved medicine. This listing is for industrial and laboratory research use only. It is not medical advice, a clinical recommendation, or an approved therapy description. Always verify regulatory status, purity, and intended use with the supplier and applicable authorities before purchase or use.
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Seller Information
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Business Type:
Trader
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Main Products:
Retatrutide
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Location:
B27 SHING LEE COMM BLDG 8 WING KUT ST CENTRAL HONG KONG
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Year of Establishment:
2026
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Inquiry History36 Inquiries
Country Product Purchase Quantity Date Posted 
United States
Factory price CAS 885340-08-9 L-Glutamine TB500
1 KG Sep 26, 2023
United States
TB500 99% White powder Beta-4 CAS 885340-08-9 powder Custom peptides
1000 Oct 30, 2023
United States
TB 500
150 MG Apr 8, 2026
United States
China Origin TB500 2mg/5mg/10mg Lyophilized Powder for the Wound Repair Research
1 G Mar 26, 2026
United States
TB500
100 MG Feb 27, 2026 
Germany
TB 500
1 KG Feb 8, 2026 
Portugal
Tb 500
10 MT Aug 7, 2024 
France
TB500
1 KG Mar 27, 2024
United States
TB500
1 G Jan 27, 2024 
Brazil
TB-500
1 G Jun 18, 2026 
Canada
TB 500
1 KG May 8, 2026
United States
TB 500
20 G Feb 23, 2026
Brazil
alejandro
300 PCS Feb 19, 2026
United States
TB500 10mg
1 MT Oct 20, 2025
United States
Tesomorelin
1 KG Aug 8, 2025 
Italy
TB500
1000 MG Dec 30, 2024 
Netherlands
tb500
1 Dec 16, 2024 
New Zealand
TB500
100 MG Jun 24, 2024
Germany
High Purity 99% Tb-500 5mg TB 500 Peptide TB500
1 MT Oct 19, 2023
United States
High Purity 99% Tb-500 5mg TB 500 Peptide TB500
10 MT Oct 12, 2023 Post an enquiry for this product
