Thymosin Alpha-1 (Tα1) is a synthetic 28-aa acetylated peptide (CAS 62304-98-7). Formula/mass anchors and lot COA purity panels. Research use only.
Thymosin Alpha-1 is a synthetic 28-amino-acid N-terminally acetylated peptide, also listed under the aliases Tα1 and thymalfasin. It is a discrete research material with its own CAS, formula, molar mass, sequence, and lot documentation — not a catalogue nickname for every related listing, and not a synonym for unrelated research SKUs or consumer therapy products.
If you found “thymosin alpha-1,” “thymosin alpha 1,” “ta1,” “thymalfasin,” “thymosin-a1,” “thymosin alpha-1 research peptide,” “thymosin alpha-1 coa,” “thymosin alpha-1 purity,” or “thymosin alpha-1 third party tested” in a listing, the useful questions are which registry fields the seller claims, whether the certificate matches those anchors, and how the vial lot is documented. Aliases vary; registry fields and certificates do not.
This page covers Peptide Foundry’s published identity anchors, the purity panels a research buyer should demand, a worked third-party lot for the live 10 mg option, and short naming literacy — then soft-handoffs to the Thymosin Alpha-1 research product page. Research use only.
Key points
- Thymosin Alpha-1 = synthetic 28-amino-acid N-terminally acetylated peptide (also listed as Tα1 / thymalfasin); supplied as lyophilized research material. Listing aliases = naming literacy only — not a therapy claim.
- Peptide Foundry catalog anchors (live PDP): CAS 62304-98-7, formula C129H215N33O55, molar mass 3108.30 g/mol — match certificate fields to these claims. No PubChem CID is published on the live PDP and none is invented here.
- SKU
PF-THYMOSIN-ALPHA-1; live size option 10 mg lyophilized — match each vial to its own lot certificate (current worked example = FO545 / ILS Laboratories).- Demand a lot-matched COA: HPLC purity with method/wavelength when stated, identity method, named laboratory, preferably portal verify; “third-party tested” / “high purity” without lot + named lab is unfinished.
- Research use only — not for human or veterinary use; not an immune-boost, antiviral, vaccine-adjuvant, oncology, longevity, wellness, or consumer drug product.
What is Thymosin Alpha-1?
Thymosin Alpha-1 is a synthetic 28-amino-acid peptide with an N-terminal acetyl group. Residue count is twenty-eight. The research material on this page is that defined acetylated peptide class with the published registry anchors below — not a crude tissue extract and not a brand stack.
The live Peptide Foundry product page publishes the sequence Ac-SDAAVDTSSEITTKDLKEKKEVVEEAEN (N-terminally acetylated). That sequence is identity and naming literacy matching the catalog chemistry block — not a therapy claim and not a reason to treat every listing alias as interchangeable.
Physical form on research listings is lyophilized solid. Peptide Foundry’s catalog documents lyophilized powder under SKU PF-THYMOSIN-ALPHA-1 at a 10 mg size option. Appearance is a handling observation — not a purity proof and not a substitute for HPLC or identity data.
Market aliases include Thymosin Alpha-1, Tα1, TA-1, and thymalfasin. Aliases help search and inventory. They are not identity proof until CAS, formula, molar mass, sequence framing, and a lot-matched certificate agree — and they are not a drug- or therapy-as-benefit claim. The live Peptide Foundry PDP does not publish a PubChem CID or a salt/counterion form; this page follows that publication set and does not invent either.
Chemical identity anchors
Peptide Foundry publishes a fixed identity set for single-vial Thymosin Alpha-1. The values below match the live catalog chemistry table at the time of writing. Confirm against the current product page if a lot or chemistry block rotates after publish.
Naming and class
Class: synthetic 28-amino-acid N-terminally acetylated peptide; research tool compound (literature class). Listing aliases: Tα1 / thymalfasin (naming only — not therapy-as-benefit). SKU PF-THYMOSIN-ALPHA-1; size option on the live listing at publish time: 10 mg lyophilized.
CAS, formula, and molar mass
| Field | Peptide Foundry catalog (live /product/thymosin-alpha-1/) |
|---|---|
| CAS | 62304-98-7 |
| Formula | C129H215N33O55 |
| Molar mass | 3108.30 g/mol |
| PubChem CID | Not published on live PDP — not invented here |
| Length / class | Synthetic 28-aa N-terminally acetylated peptide |
| Sequence (PDP) | Ac-SDAAVDTSSEITTKDLKEKKEVVEEAEN |
| Listing aliases | Tα1 / thymalfasin (naming only — not therapy-as-benefit) |
| SKU | PF-THYMOSIN-ALPHA-1 |
| Form | Lyophilized |
| Size (live option) | 10 mg |
Market pages sometimes round mass differently or recycle CAS strings across unrelated aliases. The practical rule is: match the vendor’s stated CAS + formula + molar mass + sequence framing to the lot COA, then prefer orthogonal identity (MS / HPLC-RTM) over the nickname alone.
What a Thymosin Alpha-1 COA should show
A certificate of analysis is stronger when it is lot-specific, names the laboratory, states methods, and can be checked outside the supplier’s own site. For the full verification workflow — batch match, named lab, HPLC versus identity, biosafety panels, portal codes — see How to read a research-peptide COA.
Minimum research COA fields
- A lot / batch ID that matches the vial character for character
- Test or report date(s) and a named laboratory
- HPLC purity with method (and wavelength when stated — for example 214 nm)
- An identity method (MS and/or HPLC-RTM)
- Product name / composition consistent with the label and the vendor’s published anchors
“Third-party tested,” “high purity Thymosin Alpha-1,” or “99%+” without a named lab and a lot number is an unfinished claim. A pretty PDF that cannot be tied to the vial in hand is documentation theater.
Stronger panels (when claimed)
When a full QC panel is present — the pattern on current Peptide Foundry ILS-tested lots — read these as separate analytical results:
- HPLC-RTM or mass-spectrometry identity confirmation
- Net peptide content versus labeled mass when reported
- Heavy metals by ICP-MS against stated limits
- Sterility / microbial DNA panels (for example PCR)
- Endotoxin (for example USP <85> / LAL)
- Illicit-substance screen (for example fentanyl — not detected)
These describe composition and contamination panels for research documentation — not a safety-for-human-use claim, and not a substitute for identity or purity.
Worked example — lot FO545 (10 mg)
As published on the current Peptide Foundry Thymosin Alpha-1 listing at the time of writing for the 10 mg option:
| Field | Value |
|---|---|
| Lot | FO545 |
| Size | 10 mg |
| Laboratory | ILS Laboratories |
| Received | 07/17/2026 |
| Tested / reported | 07/19/2026 |
| Purity | 99.33% (HPLC @ 214 nm) |
| Net peptide content | 10.18 mg |
| Identity | HPLC-RTM — Pass / Confirmed |
| Fentanyl screen | Pass / Not Detected |
| Heavy metals | ICP-MS Pass (As/Cd/Pb/Hg/Cr Not Detected vs specs) |
| Sterility | PCR Pass / No Growth |
| Endotoxin | USP <85> Reported NMT 0.05 EU/mL |
| Access code | YUZZF5D3 |
| COA / accession | COA-2026-DSZCEM / ACC-2026-10897 |
Cite those figures as Peptide Foundry–published transparency for this lot — not a universal industry floor. Re-verify against the live product panel if the lot rotates. Downloadable COA PDF/PNG appear on the live listing; verify independently at the ILS Laboratories portal (portal.ils-lab.com) with the published access code.
Three steps that travel with any lot, not just FO545:
- Match the lot number on the vial to the lot on the certificate.
- Confirm CAS, formula, and labeled mass against the certificate and the product label.
- Verify the access code on the issuing laboratory’s own portal (ILS Laboratories for FO545: access code YUZZF5D3) — not only by opening a PDF hosted by the supplier.
Portable vendor criteria beyond a single SKU: USA research-peptide vendor criteria.
Related research materials (soft literacy only)
Primary CTA remains Thymosin Alpha-1. Soft literacy hubs below support the same trust workflow — they are not chemical synonyms and not a dual-CTA stack.
- How to read a research-peptide COA — batch match, named lab, HPLC versus identity, portal codes.
- USA research-peptide vendor criteria — supplier checklist literacy beyond a single SKU.
- Lyophilized peptide reconstitution — general lab diluent literacy without Thymosin Alpha-1 schedules.
Match each vial to its own registry fields and lot certificate. Literacy adjacency is not a stack recommendation.
Tool-compound / naming literacy (preclinical framing only)
Naming language here classifies listing aliases and published sequence identity only. It does not establish catalogue-product outcomes in people, and it does not convert a citation into a certificate.
| Literature / naming class (examples) | Acceptable framing on this page | Not used as product framing |
|---|---|---|
| Synthetic 28-aa N-terminally acetylated / Tα1 / thymalfasin naming | Listing name Thymosin Alpha-1 refers to a published synthetic 28-aa N-terminally acetylated peptide also listed as Tα1 / thymalfasin used as a research tool compound | Immune-boost peptide, antiviral product, vaccine-adjuvant product, oncology/cancer product, or longevity product |
| Sequence / acetylated identity | Sequence Ac-SDAAVDTSSEITTKDLKEKKEVVEEAEN as registry literacy matching the live PDP | Drug, compounding-pharmacy, or prescription framing as product benefit |
Therapeutic-adjacent titles in wider SERPs sit outside this RUO identity page and are not summarized as product use. Identity remains an analytical question answered by CAS, formula, sequence framing, and the lot COA.
Storage and lab handling (lyophilized)
Standard laboratory practice for lyophilized synthetic peptides applies:
- Storage. Sealed vials at −20°C, protected from light and moisture. Lyophilized material is substantially more stable than solution.
- Temperature excursions. Brief ambient exposure in transit is normal for lyophilized material. Return vials to −20°C on arrival.
- Freeze–thaw. Minimize repeated freeze–thaw.
- Traceability. Keep the lot number with the material — lot number ties a vial back to its certificate.
The live FO545 certificate does not report a stability study, storage temperature, or validated shelf life after preparation — this page does not invent one. Assay-specific handling follows your institution’s SOPs. This page does not publish personal reconstitution schedules or solution-use protocols for Thymosin Alpha-1. General diluent literacy (without compound-specific schedules): Lyophilized peptide reconstitution.
Common questions
What is Thymosin Alpha-1’s CAS, formula, and mass?
CAS 62304-98-7; formula C129H215N33O55; molar mass 3108.30 g/mol; synthetic 28-amino-acid N-terminally acetylated peptide with sequence Ac-SDAAVDTSSEITTKDLKEKKEVVEEAEN. Peptide Foundry catalogs the material as SKU PF-THYMOSIN-ALPHA-1 (10 mg lyophilized option at publish time). Prefer registry fields over listing nicknames; no PubChem CID is published on the live PDP.
Is Thymosin Alpha-1 the same as Tα1 / thymalfasin?
Those strings are the same listing/alias family for this research material when CAS, formula, molar mass, and the lot certificate agree. Styling is not a second compound. On this RUO page, Tα1 / thymalfasin are naming literacy only — not a therapy claim. Match registry fields and the vial lot — do not treat an alternate hyphenation as identity proof by itself.
What makes a Thymosin Alpha-1 COA usable — and what does “third-party tested” require?
Lot match to the vial, a named laboratory, HPLC purity with method/wavelength when stated, an identity method (MS and/or HPLC-RTM), and preferably an independent portal verify path. Stronger documentation adds net peptide content, heavy metals, sterility/microbial panels, endotoxin, and illicit screens when claimed. Worked FO545 figures above — ILS Laboratories, HPLC 99.33% @ 214 nm, HPLC-RTM Pass, net 10.18 mg, access code YUZZF5D3 — are an example of that pattern on Peptide Foundry’s live listing. Workflow detail: How to read a research-peptide COA.
Does Peptide Foundry sell Thymosin Alpha-1 10 mg?
Yes. The live product page lists a 10 mg lyophilized option under SKU PF-THYMOSIN-ALPHA-1. Match the vial lot to the certificate on the listing (current worked example = FO545 / ILS Laboratories). Soft handoff: Thymosin Alpha-1 research product page.
Is this for immune boost, antiviral use, vaccine adjuvant, oncology, longevity, or human use?
No. Peptide Foundry supplies Thymosin Alpha-1 strictly for laboratory and research use by qualified researchers. Listing aliases such as Tα1 / thymalfasin are naming literacy only, not a drug- or therapy-as-benefit claim. This page does not describe consumer finished goods, personal-use schedules, administration protocols, or stack recommendations. Thymosin Alpha-1 here is not a drug, supplement, wellness product, consumer finished good, or veterinary product, and not for use in people or animals.
For the current lot certificate and product specifications, see the Thymosin Alpha-1 research product page. Related library reading: How to read a research-peptide COA, USA research-peptide vendor criteria, and Lyophilized peptide reconstitution.
Research use only. Nothing on this page describes or implies use in humans or animals. Thymosin Alpha-1 on this page is identity, CAS, and lot-documentation literacy only — not an immune-boost, antiviral, vaccine-adjuvant, oncology, longevity, wellness, medical, or consumer drug product.
