Last updated: May 2026
Summary: Thymosin Alpha-1 is a synthetic 28-amino-acid peptide based on a sequence isolated from the thymus gland. PeptideDropship supplies research-grade Thymosin Alpha-1 to verified B2B partners under strict research-use-only labeling. 99%+ purity verified by HPLC and mass spectrometry, third-party COAs per batch, no MOQ, US Same-Day California Shipping & 2-Day US Delivery. For research use only: not for human or veterinary use.
Technical specifications
| Parameter | Value |
|---|---|
| Peptide name | Thymosin Alpha-1 (Tα1) |
| Type | Synthetic 28-amino-acid peptide |
| Sequence (1-letter) | Ac-SDAAVDTSSEITTKDLKEKKEVVEEAEN |
| Molecular formula | C₁₂₉H₂₁₅N₃₃O₅₅ |
| Molecular weight | 3108.32 g/mol |
| CAS number | 62304-98-7 |
| Form | Lyophilized white powder |
| Standard pack sizes | 5 mg, 10 mg vials |
| Storage | −20°C lyophilized; 2–8°C after reconstitution |
Manufacturing and quality control
Thymosin Alpha-1 is produced via solid-phase peptide synthesis (SPPS) and independently verified by a third-party analytical laboratory before release. Every batch ships with a complete Certificate of Analysis. Standard QC includes:
- Mass spectrometry for molecular weight confirmation (the 28-amino-acid sequence is among the longer peptides in the catalog and verification is critical)
- Reverse-phase HPLC for purity (99%+ standard)
- Counterion content (typically acetate or TFA salt)
- Karl Fischer water content
- LAL endotoxin testing available on request
Wholesale availability
- No minimum order quantity
- Tiered pricing: per-unit cost decreases with monthly volume
- Same-Day California Shipping & 2-Day US Delivery from US-based warehouse
- API integration for automated order routing
White-label and private-label options
Generic, white-label, or private-label fulfillment available. See the white-label vs. private-label guide.
Packaging, shipping, and storage
Thymosin Alpha-1 ships as lyophilized powder in sealed amber vials with tamper-evident closure. Shock-protection packaging is standard. Cold-chain shipping is available. Because Thymosin Alpha-1 is a longer peptide (28 amino acids), it tends to be more sensitive to storage conditions than shorter peptides: careful handling and storage at −20°C lyophilized is particularly important for stability.
Compliance and labeling
Thymosin Alpha-1 is supplied to verified B2B partners exclusively for research use under strict research-use-only labeling. Resellers are responsible for maintaining research-use-only labeling, the FDA disclaimer, and compliance with state, local, and international regulations. Note that Thymosin Alpha-1 is the active ingredient in a compounded pharmaceutical in some jurisdictions; research-grade Thymosin Alpha-1 supplied here is for laboratory research only, not for regulated or non-laboratory application.
FAQ
How does Thymosin Alpha-1 compare to TB-500 (Thymosin Beta-4 fragment)?
Thymosin Alpha-1 and TB-500 are chemically distinct peptides despite the shared “Thymosin” naming. Thymosin Alpha-1 is a 28-amino-acid peptide; TB-500 is the synthetic 7-amino-acid acetylated fragment of the larger Thymosin Beta-4 protein. Different molecular weights, different sequences, different research profiles. See the TB-500 page for that peptide’s specifications.
What pack sizes are available?
Standard pack sizes are 5 mg and 10 mg vials. Custom pack sizes available through private-label fulfillment.
What’s the standard purity?
99%+ verified by HPLC and confirmed by mass spectrometry. The longer 28-amino-acid sequence means MS verification is particularly important to confirm full-length synthesis without truncated side products.
Are sample COAs available?
Yes. Verified partners can request COAs from recent batches before placing an order.
How is Thymosin Alpha-1 stored?
Lyophilized at −20°C for long-term stability. After reconstitution, store at 2–8°C, minimize freeze-thaw cycles (consider single-use aliquots), and use within the documented stability window for the relevant research application.
Get started
Apply for verified partner access. For business model context, see the peptide dropshipping guide. For other immune-research-context peptides, see the related-peptides section below.
Scale Your B2B Catalog with California Same-Day Fulfillment
Partner with peptide dropshipping infrastructure built for B2B research brands. Access 105+ lyophilized SKUs with 0 MOQ, batch-specific 99%+ HPLC and Mass Spectrometry COAs, and Same-Day California Shipping & 2-Day US Delivery ($15 flat-rate shipping, +$2 optional custom vial box). Explore our white-label peptides program, compare private-label peptides options, review our wholesale peptide supplier catalog, or read the complete peptide dropshipping guide.
Transparent B2B Membership Tiers: Tier 1: $397/mo (Standard Wholesale) • Tier 2: $497/mo (10% Off Wholesale) • Tier 3: $697/mo (25% Off Wholesale).
These statements have not been evaluated by the FDA. Supplied strictly for in-vitro laboratory research and analytical reference use. For research purposes only: not for human or veterinary use. PeptideDropship sells research-grade peptides exclusively to verified B2B partners under research-use-only labeling.