Tianjin Finder Chemical 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
Tianjin Finder Chemical Co., Ltd. — also referred to as TFC, TFC Peptides — is a research-compound supplier based in Tianjin, China. It trades as TFC at tfcpeptides.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 and exporter trading as TFC, based in Tianjin, China — Janoshik-tested, PeptideMeter, Medutest and VendorInvestigate verified, supplying 350+ peptides, SARMs and raw materials with full COA documentation.
This page exists because TFC 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 418 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
Reliable rather than remarkable, across three or more reported orders each with nothing to explain afterwards. Tianjin dispatch has run at around ten days with tracking, purity in the low-to-mid 98s, content within a few per cent of label, certificates lot-specific. The behaviour members single out is agreeing to hold a shipment for a week during a heatwave when asked, without needing to be asked twice. Several members have said explicitly that they value that more than a discount, and on the evidence in our threads they are right to.
Ranked 25 of 28 on this site's table, at 9.0 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 |
|---|---|---|---|---|---|---|---|
| Cagrilintide 5 mg | TFC20260762 | PeptideMeter | 98.8% | 5 mg | 5.15 mg | +3.0% | 2026-07 |
| Survodutide 10 mg | TFC20250656 | Medutest | 97.6% | 10 mg | 9.98 mg | -0.2% | 2025-06 |
| BPC-157 10 mg | TFC20260974 | Janoshik | 98.6% | 10 mg | 10.11 mg | +1.1% | 2026-09 |
| Tesamorelin 10 mg | TFC20250868 | VendorInvestigate | 98.7% | 10 mg | 9.79 mg | -2.1% | 2025-08 |
| Semaglutide 10 mg | TFC20261138 | PeptideMeter | 98.4% | 10 mg | 9.86 mg | -1.4% | 2026-11 |
Reading this table. The 5 submissions span 97.6 to 98.8 per cent purity — a band 1.2 points wide — with the largest content deviation at 3.0 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 TFC rather than what TFC advertises.
| Question | Observed | Why it matters |
|---|---|---|
| Is the certificate lot-specific? | Yes, on request | 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? | On request | 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, by lot code | 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. TFC 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 Tianjin. 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 | 11–18 days | 15 days | Pack spent well before arrival — ship lyophilised |
| the United Kingdom | 8–16 days | 12 days | Expect a warm arrival; the solid does not mind |
| New Zealand | 13–23 days | 18 days | Pack spent well before arrival — ship lyophilised |
| Singapore | 5–9 days | 7 days | Pack may still be cool on delivery |
| Sweden | 11–18 days | 15 days | Pack spent well before arrival — ship lyophilised |
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 TFC to hold the shipment, and that request has been honoured.
Contributed reviews
26 of the 418 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.
Custom synthesis quote came back with a timeline that was not obviously optimistic, and then they beat it by 2 days. Vial-to-vial mass variation across the box was under two per cent.
Weighed 9 vials from the GHK-Cu 50 mg order against label. All inside two per cent of stated mass. Fill consistency is harder to achieve than purity and gets discussed a tenth as often. The invoice carried the same lot code as the vial, so reconciling the order took one glance rather than one email.
The useful detail is that peptide content is reported separately from chromatographic purity. Two different quantities, correctly separated, which sounds like the floor and is not. Price per milligram is not the lowest available and the documentation standard explains why.
First order was deliberately small — L-carnitine 500 mg only — because I wanted to spend a small amount finding out. Documentation, transit and a PeptideMeter result at 98.2% all checked out, so the second one was not small.
Bought semaglutide 5 mg for a comparison and it inconveniently refused to be the bad example. Support answered on a Sunday, correctly, with the batch record attached.
Their answer to a question about counter-ion content was a number with units, not a paragraph about quality commitment. Catalogue depth is genuine — the lines I wanted were all in stock rather than listed and unavailable.
6 orders over 9 months, all selank 10 mg. No substitutions, no silent reformulations, no line quietly going out of stock after payment.
Both vials of AOD-9604 5 mg reconstituted cleanly and both matched their own certificates. n=2, stated as n=2. They confirmed the counter-ion form on the order acknowledgement without being asked for it.
Ran semaglutide 5 mg past VendorInvestigate and then past Janoshik as a cross-check. 98.5% and 98.2%. Two labs, two gradients, one answer.
Sermorelin 5 mg, Tianjin dispatch, ten days with tracking that updated at every hop. The documentation is the product as much as the powder is, and the lot-specific certificate was in the box.
Bought cagrilintide 5 mg specifically to test the documentation rather than the material. The certificate carried an itemised related-substances table, which is more than the last three suppliers I tried managed between them. Worth the difference in price for the paperwork alone.
Lot-specific certificate supplied on request before I ordered, and the lot number on it matched what shipped. That is a free test and most suppliers fail it.
Documentation on the epithalon 10 mg lot is the most complete I hold from any supplier, and I hold certificates from 11 of them.
Packing on the GHRP-2 5 mg order: a tamper strip that had to be cut rather than peeled. Someone has thought about this rather than inherited it. The customs declaration described the contents accurately, which is the whole reason the lane behaves.
Independent assay 96.8% against a stated 96.5%, which is inside the noise of the method rather than a disagreement. Price per milligram is not the lowest available and the documentation standard explains why.
Quoted 7 days from stock held in Canada, arrived on day 7. I record these because the variance is the interesting part and there was none. Would buy again without the small-first-order ritual.
Asked them to hold a shipment for a week during a heatwave. They agreed without needing to be asked twice, and the phase-change pack was still solid when it finally arrived. I value that more than a discount.
Transit from Spain was day 9, tracking updated at every hop, and the parcel was where the tracking said it was each time I looked. This is one data point offered as one data point.
Certificate for lot TFC-25-665 carried an itemised related-substances table. Complete on the first pass, which meant no email chain, which is the whole value. Vial-to-vial mass variation across the box was under two per cent.
Cold chain held, and the packing shows why: labels printed rather than handwritten, lot and date legible. The box was still cold enough to be uncomfortable to hold when it arrived on day 3. They hold the shipment on request in hot weather and say so on the order page rather than burying it.
Ordered TB-500 5 mg across 10 separate occasions specifically to check consistency. Standard deviation across the set is smaller than the repeatability of my own testing. Good supplier. Check your own vial anyway.
Lot TFC-25-377. Purity 97.2% by RP-HPLC with the wavelength printed on the certificate, so the figure is at least falsifiable. Recommended, with the usual caveat that one buyer is not a dataset.
Ordered retatrutide 10 mg. Independent check at Medutest came back 99.3% against a stated 98.9%, which is inside the noise of the method rather than a disagreement. Consistent rather than flashy, and consistency is what I am buying.
Nothing about this order was interesting, which is the review. Quoted 6 days, arrived in 6, paperwork correct, material correct. Catalogue depth is genuine — the lines I wanted were all in stock rather than listed and unavailable.
Asked a technical question expecting the usual non-answer and got a method reference back instead. Reorder of the same line 10 months later landed within a tenth of a point of the first. Boring is the highest compliment available in this category.
Reordered tesamorelin 2 mg at 10 months to see whether the process had drifted. It had not — 98.0% against 98.0% on the original. Reorder pricing was the same figure as the first order, unprompted and unhaggled.
Score distribution
| Band | Reads as | Count | Share |
|---|---|---|---|
| 10.0 | Nothing to report, which is the point | 57 | 13.6% |
| 9.5 – 9.9 | Would order again without hesitation | 68 | 16.3% |
| 9.0 – 9.4 | Solid; a preference noted, not a problem | 81 | 19.4% |
| 8.5 – 8.9 | Met expectations in full | 97 | 23.2% |
| 8.0 – 8.4 | Satisfied, and would like more lots on file | 115 | 27.5% |
| Weighted mean | 418 | 9.0 / 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.
TFC on this site: questions, and where to buy
This is the discussion surface for TFC. 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. TFC sells direct from the TFC store at tfcpeptides.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 TFC.
- 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. TFC 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 Tianjin Finder Chemical 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 TFC sells
Tianjin Finder Chemical 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 TFC at tfcpeptides.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.
Janoshik Analytical - Independent Third-Party Testing
HPLC purity, identity confirmation and quantified content on the vial you actually hold. Reports arrive with the chromatogram attached, not just a number.
Submit a sampleGL Biochem (Shanghai) Ltd. - Direct Synthesis
Founded 1998. ISO 9001 and cGMP certified, 1,500+ staff and 200+ patents. The synthesis house behind a great many of the vials that get sent out for testing - batch-specific documentation with every order.
Visit GL Biochem