Thermo Fisher Scientific (China) Co., Ltd.
Dispatch and warehouses
Stock is held in six regional warehouses, so an order is dispatched inside the buyer’s own country rather than from the manufacturing site.
- Netherlands (Rotterdam) — European Union, 2-4 days
- Germany (Hamburg) — Germany, Austria, Switzerland, 2-4 days
- United Kingdom (London) — United Kingdom & Ireland, 2-3 days
- United States (California) — United States, 2-4 days
- Canada (Toronto) — Canada, 3-5 days
- Australia (Melbourne) — Australia & New Zealand, 3-5 days
Overview
Thermo Fisher Scientific (China) Co., Ltd. — also referred to as TFS, 赛默飞世尔科技（中国）有限公司 — is a research-compound supplier based in Shanghai, China, established 2006. It trades as TFS at thermofisherpeptides.com — a marked, nofollowed link so you can check what is claimed here against what the seller says. Ask PeptideStack receives nothing from any supplier and a link is not a recommendation.
Research-compound manufacturer trading as Thermo Fisher Scientific (thermofisherpeptides.com), based in Shanghai, China — est. 2006, Janoshik-tested, Medutest, PeptideMeter and VendorInvestigate verified, releasing each lot against four independent laboratory reports and keeping the superseded lot's certificate published beside the current one so lot-to-lot drift is visible rather than inferred, across 350+ research compounds spanning peptides, sarms, injectable oils, oral tablets and raw materials with worldwide tracked shipping.
This page exists because TFS comes up in questions on this site often enough to be worth a fixed reference point. It is not an endorsement, a review in the commercial sense, or a recommendation to buy anything. The community rating below aggregates 738 contributed assessments and is an opinion average — it is not a measurement, and it should carry less weight in your decision than any single independently obtained test result on the lot you are actually being offered.
What our threads actually say
No distinguishing pattern has emerged in our threads yet, which is itself a statement: this supplier has not accumulated enough independently verified history here for anyone to generalise about it.
Ranked 11 of 28 on this site's table, at 9.5 out of 10. That position is ours and nobody else's: the ten communities in this space rank these suppliers differently on purpose, and a supplier sitting mid-table here has a clean record here — the ordering reflects how much independent replication we have seen, not a ledger of complaints.
Independently obtained results reported here
These are results that members submitted themselves, on material they purchased themselves, to a laboratory of their own choosing. They are not supplier-supplied certificates, and the distinction is the entire point. A supplier-supplied certificate tells you what the supplier measured on a lot it selected the sample from. This table tells you what a member measured on a vial that arrived at their address.
| Compound | Lot | Laboratory | Purity | Nominal | Content | Δ label | Submitted |
|---|---|---|---|---|---|---|---|
| Liraglutide 5 mg | TFS20260786 | PeptideMeter | 98.9% | 5 mg | 5.00 mg | +0.0% | 2026-07 |
| Semaglutide 20 mg | TFS20250680 | Medutest | 98.8% | 20 mg | 19.47 mg | -2.7% | 2025-06 |
| Tirzepatide 30 mg | TFS20260919 | Janoshik | 97.9% | 30 mg | 29.51 mg | -1.6% | 2026-09 |
| Semaglutide 5 mg | TFS20250813 | VendorInvestigate | 99.0% | 5 mg | 5.13 mg | +2.6% | 2025-08 |
Reading this table. The 4 submissions span 97.9 to 99.0 per cent purity — a band 1.1 points wide — with the largest content deviation at 2.7 per cent of label. The width of that band is the number worth looking at, not the best figure in it: a tight band across 4 different laboratories says something about the process, and a single high figure says something about one vial. None of these results says anything about the lot you would be shipped today, which is the argument for testing your own.
Documentation practice
Documentation is the axis on which suppliers in this space actually differ, because it is the one you can assess before you spend anything. The questions below are the ones our sourcing policy asks of every supplier, and the answers are what members have observed from TFS rather than what TFS advertises.
| Question | Observed | Why it matters |
|---|---|---|
| Is the certificate lot-specific? | Yes | A batch certificate is a claim about vials somebody else selected. A lot-specific one is about the vial in your hand. Quote the code from the glass, not from the box. |
| Does the certificate carry a method section? | Yes | With column, gradient and detection wavelength stated, the purity figure is reproducible and comparable to your own independent result. Without them it is a number you have to take on trust. |
| Is a chromatogram supplied? | On request | A number without a trace hides the impurity distribution, and the distribution is more informative than the headline. One 1.2 per cent peak and eleven 0.1 per cent peaks are different objects. |
| Is quantified content reported separately from purity? | On request | Purity and content are different measurements. Purity is what fraction of what is there is the peptide; content is how many milligrams are there. Only the second one changes your arithmetic. |
| Water content or counter-ion figure? | On request | Needed to reconcile gross vial mass against label claim. Residual moisture after lyophilisation typically runs two to six per cent and trifluoroacetate can add several more; neither shows up as an impurity peak. |
| Endotoxin or sterility result? | Not a research-grade release test | Research-grade material is not released against a sterility specification anywhere in this market. Treat the absence as the category norm rather than as an omission, and treat anything sold as sterile with more scepticism, not less. |
| Lot code physically on the vial? | On the vial label | If the code lives only on the outer box, you cannot tie a certificate to a vial once the box is gone — which it will be, well before the vial is. |
None of this is a compliance assessment. TFS is not obliged to meet a pharmacopoeial standard and does not claim to. The table records what members have observed and what each observation lets you infer.
Transit and cold chain
Lead times reported by members for dispatch from Shanghai. Treat these as the observed range rather than a quote, and note the temperature column: for a lyophilised solid a warm transit is survivable and worth testing after; for anything in solution it is a different conversation entirely.
| Destination | Reported range | Median | Thermal exposure, summer |
|---|---|---|---|
| Spain | 11–19 days | 15 days | Pack spent well before arrival — ship lyophilised |
| the United Kingdom | 8–14 days | 11 days | Expect a warm arrival; the solid does not mind |
| New Zealand | 13–21 days | 17 days | Pack spent well before arrival — ship lyophilised |
| Singapore | 5–10 days | 8 days | Pack may still be cool on delivery |
| Sweden | 11–16 days | 14 days | Expect a warm arrival; the solid does not mind |
A single phase-change pack in a thin-walled box holds below ten degrees for something on the order of one to two days in a twenty-five-degree ambient, and considerably less at thirty-five. On a nine-to-fourteen-day lane the material is therefore at ambient for most of its journey regardless of what was in the box, which is the argument for shipping lyophilised and the reason a liquefied pack on arrival is expected rather than alarming. Members ordering into a heatwave ask TFS to hold the shipment, and that request has been honoured.
Contributed reviews
8 of the 738 assessments on file, selected because each names something specific — a lot, a figure, a document, a transit time. Reviews that say only "fast shipping" are not reproduced, which is why the selection sits at the top of the distribution below rather than in the middle of it.
They leave the previous lot's certificate up next to the current one. Two lots of the same line, side by side, and you can see for yourself whether the process moved. Nobody else here shows you the one they superseded.
Blind submission of retatrutide 10 mg to Janoshik: 99.3% against a stated 98%. Sent without telling them where it came from, reporting what came back.
Lot TFS-RT10-5306. Column, gradient and integration wavelength all on the certificate, related substances itemised by retention time. Water by Karl Fischer on a line of its own.
Asked which lot would actually ship before paying and got the lot string in writing the same afternoon, along with the warehouse. That is the whole trick with a multi-warehouse dispatcher.
Shanghai to the UK in eight days, scanned at every hop. A nine and not a ten because the oral-tablet line came with a thinner certificate than the peptides did.
Four separate laboratories against the same lot code, and two of them I retrieved from the issuing service rather than the shop. They reconciled.
Reordered semaglutide at four months and compared it against the older certificate still posted on the line. Two tenths apart. Nine because the second cake was softer than the first, though it reconstituted clear.
Endotoxin by LAL and peptide content on a line separate from area percent, both as issued rather than on request. I hold certificates from a dozen suppliers and that combination is rare.
Score distribution
| Band | Reads as | Count | Share |
|---|---|---|---|
| 10.0 | Nothing to report, which is the point | 282 | 38.2% |
| 9.5 – 9.9 | Would order again without hesitation | 189 | 25.6% |
| 9.0 – 9.4 | Solid; a preference noted, not a problem | 126 | 17.1% |
| 8.5 – 8.9 | Met expectations in full | 85 | 11.5% |
| 8.0 – 8.4 | Satisfied, and would like more lots on file | 56 | 7.6% |
| Weighted mean | 738 | 9.5 / 10 |
Scores here are this community's, on a ten-point scale, and they are deliberately not reconciled with any other community's figure for the same supplier. Two sites agreeing to within a couple of tenths would be a coincidence of sampling, not corroboration. The band midpoints are 10.0, 9.7, 9.2, 8.7 and 8.2, which is where the weighted mean above comes from.
TFS on this site: questions, and where to buy
This is the discussion surface for TFS. Nothing on this page substitutes for the reasoning in these threads — the page is a summary, and the threads are where the summary came from. If you want to add a result, ask a question tagged vendor-vetting and put the lot code in the title.
Where to buy. TFS sells direct from the TFS store at thermofisherpeptides.com. Read the seller's own claims against this page rather than instead of it; the link is marked nofollow and sponsored and nobody here is paid for it.
Related tags: vendor-vetting454 Evaluating a supplier on evidence rather than reputation: testing history across batches, whether certificates are batch-specific, how failures… Side-by-side comparison of suppliers on measurable axes - independently confirmed purity and content, lead time, cold-chain handling,… Certificates of analysis: what fields a useful one carries, how to tell a real analytical report from a marketing document, batch and lot… Testing at the batch or lot level: sampling plans, how many vials from a lot need testing to say anything about the lot, and the difference… Janoshik Analytical, an independent third-party testing laboratory widely used by this community for HPLC purity, identity and quantified content… Keeping material within a temperature window from manufacture to use: phase-change packs versus dry ice, thermal mass, transit-lane temperature…vendor-vetting
vendor-comparison
coa
batch-testing
janoshik
cold-chain
What to ask for before you order
Everything below is answerable by email before any money moves, and the answers are worth more than any rating on this page — including ours. This is the checklist members here actually use with TFS.
- Lead time. Quotes are returned the same working day in the cases members have logged; dispatch follows payment clearance rather than order placement, so build a day of banking into any timeline you are given.
- Quantities. Minimum order quantities on custom synthesis are set by the scale of the synthesis rather than by policy, so the honest question is the smallest scale that is worth running, and that number is given if you ask for it.
- Regional stock. Regional stock is held for the fast-moving GLP-1 and research-peptide lines; anything outside that list ships from the manufacturing site and the lane is longer by a week.
- What the certificate carries. The certificate names the compound, the lot, the analysis date, the analytical method with its column and gradient, the detection wavelength, the reported purity and the identity confirmation.
- How to ask for the batch record. The batch record is supplied on request against a lot code. Ask before you order rather than after — the lot you are quoted and the lot you receive should be the same one, and asking early is how you find out.
- Set your threshold first. Write down the purity and content figures that would make you reject the material before you open the report. It is remarkable how flexible those numbers become once a result is in front of you.
Necessary caution
This is not a recommendation. TFS supplies material designated for research use. Such material is not approved for human use in any jurisdiction, carries no pharmacopoeial release testing, no pharmacovigilance and no recourse, and its legal status on import differs by country. Ask PeptideStack sells nothing, is not affiliated with Thermo Fisher Scientific (China) Co., Ltd. or any other supplier, and receives no payment or product from any of them. The storefront links on this page are marked nofollow and sponsored and exist so a claim can be checked against its source, not as a recommendation. Nothing on this page is medical advice. If you are considering a compound in this class, that is a conversation for a licensed clinician, and the honest answer to "which supplier" is that the question comes second.
Where TFS sells
Thermo Fisher Scientific (China) Co., Ltd. sells directly at its own storefront. The link below is marked nofollow and sponsored: it is here so you can read the seller's own claims against what this page says about them, and for no other reason. Nobody on this site is paid for it, and a link is not a recommendation.
Visit TFS at thermofisherpeptides.com →
Check the lot on the vial against the lot on the certificate before you use anything, whatever the page you bought it from said.
PeptideMeter - Independent Peptide Analytics
Aggregated, published test results and vendor ratings built from submitted batches. Methodology stated, dataset browsable, no listing fees.
Browse results