Short answer · updated 11 September 2026
Chemyo closed permanently on 8 September 2026, so where you go next depends entirely on what you were actually buying from it. Its catalog was SARMs, SERMs, nootropics and solvents in pre-mixed solution, and it never listed peptides. If that solution shelf is what you want replaced, you are shopping for another solution vendor and the section below tells you how to judge one. If your work is moving toward research peptides instead, that is a different category with different paperwork, and it is the one we are in.
Searching for sites like a vendor you already use is usually a symptom rather than a plan. Something prompted it. A product went out of stock for a month, or a report you wanted to check wasn’t where you assumed it would be, or you finally sat down and realised you’d been ordering for a year on the strength of a badge that said “third-party tested” and never once opened a report. Whatever started it, you now have a browser full of tabs that all look interchangeable.
They aren’t interchangeable, and the differences don’t show up in the design. They show up in what each site is willing to publish before you hand over money. That’s the only comparison that survives contact with a real order, so it’s the one worth learning to run quickly.
One thing to sort out before you start clicking. Chemyo closed permanently on 8 September 2026, and right up to that day its catalog was SARMs, SERMs, nootropics, solvents and lab supplies, mostly sold as pre-mixed liquid solutions, and no peptides appeared in its listings. If you want the same shelf from someone else, you’re comparing solution vendors. If your work is moving toward research peptides, the paperwork you need is different, and a supplier that never had a reason to publish sterility or endotoxin data won’t suddenly have it. Below is a rubric that works for either, followed by what Chemyo’s own site states when you run it.
Key takeaways
- The comparison that matters is documentary: who made the material, which laboratory tested it, what the panel covered, and whether the report carries a code you’ll find on the container in your hand.
- Blank Peptides synthesises, vials, labels and QC-tests its own lots in a cGMP laboratory, names its testing labs (Freedom Diagnostics and Horizon Analytical), and reports identity, >99% purity, bacterial endotoxin and sterility per lot.
- Chemyo publicly states that products are verified by independent third-party laboratories for identity, purity and concentration, that FTIR and HPLC are the methods used, and that batch codes let a buyer find the report for their specific batch.
- The testing laboratory’s name, the origin of the raw material before formulation, and endotoxin or sterility results were not listed on the pages reviewed on 8 September 2026, its last day of trading.
- All material discussed is research-use-only, intended for in-vitro laboratory work by qualified professionals, and nothing here is a recommendation for any other use.
What separates one supplier site from another?
Vendor sites converge on a house style, and it’s a style that makes comparison hard on purpose. You get the same purity figure, the same sentence about independent testing, the same reassurance about discreet shipping. Reading five of them in a row will teach you almost nothing about which to pick, because they’re all making identical claims in an identical order, so the only productive move is to go looking for whatever sits behind those claims. Five questions get you there.
The first is provenance, meaning what the site says about where material originates. Some vendors state plainly that they synthesise. Others describe formulating, blending, bottling, sealing and coding, which is finishing work performed on material that arrived from somewhere else, and both of those are perfectly real businesses. The practical difference is that only one of them can answer a question about the synthesis route, and you want to know which kind you’re buying from before the day you need to ask.
The second is the laboratory. A named lab turns a marketing line into something checkable, since you can search the name, confirm it exists, and contact it about a specific report number, whereas an unnamed “accredited third party” leaves you roughly where you started.
The third is the scope of the panel, and this is where most comparisons go wrong. Purity by HPLC answers one question about one property. Identity answers a second, and the method matters, since mass spectrometry weighs the molecule while infrared spectroscopy compares a fingerprint against a reference. For anything sold pre-mixed, a concentration assay answers a third question that powder buyers never have to think about, and for anything going near cell culture, bacterial endotoxin and sterility answer two more that a chromatogram can’t touch.
The fourth is traceability, which comes down to whether reports carry a batch or lot code that also appears on the container you receive. Without that link, the archive is a library of documents about products in general rather than a record of yours.
The fifth is composition. Any multi-compound product should state the milligrams of each component, whether that arrives as one combined vial or as two bottles sold together at a package price.
How Blank Peptides makes and tests each lot
Blank Peptides runs its own cGMP laboratory in the USA and keeps every stage internal: synthesis, vialing, lyophilisation, finishing, labelling and QC all happen under one roof and one team. The company frames this as owning the chain of custody rather than acting as a relabeler or broker. It also contract-manufactures and fulfils for other research peptide brands, which it describes as a category of work without naming clients.
Each lot is sent to two named outside laboratories, Freedom Diagnostics and Horizon Analytical, for a full panel covering identity by mass spectrometry, purity by HPLC at >99%, bacterial endotoxin and sterility. Every lot’s results are published as batch certificates of analysis, and the lot number on the vial matches the number on the certificate, so the buyer closes that loop without contacting anyone.
The catalog holds 34 compounds, which is small on purpose. Blends state composition per component: GLOW is 70mg of GHK-Cu, BPC-157 and TB-500 combined; KLOW is 80mg with KPV added; Wolverine is 20mg of BPC-157 and TB-500. Lyophilised vials carry roughly a 24-month expiration, processing time is within 1 business day, and shipping is at room temperature, which is standard handling for lyophilised peptide. After five years the company’s position is that a narrow catalog with complete per-lot documentation is the better trade, and a buyer who needs breadth will fairly conclude that we’re the wrong shop.
What Chemyo publicly states
Chemyo traded at chemyo.com until it closed permanently on 8 September 2026, and up to that day the site was live, stocked and accepting orders. The homepage headline was “High Quality SARMs For Sale”, supported by “Third-party tested”, “99%+ Purity” and “Triple tested before release. 1,000+ samples independently tested across identity, purity, and concentration.” Its Solutions category listed 18 products, with powders, solvents, nootropics, SERMs, value packs and lab supplies alongside.
On testing, the site states that “Every Chemyo product is verified by independent, third-party laboratories for identity, purity and concentration. We publish the results in full so you can review them before you buy.” FTIR is described as the identity method and HPLC as the purity and concentration method. The FAQ states that products “undergo blind and independent 3rd party testing by one of the most capable and reputable test centers in the United States”, and that the company supplies “FULL raw 3rd party test data, not just a COA!”
Two things Chemyo does are worth conceding without qualification. The first is the concentration assay on finished solutions. A vendor selling pre-mixed liquid has to prove the stated mg/ml survived formulation, and Chemyo publishes that result; a powder vendor like us never runs that test because we don’t sell liquids, so on the question a solution buyer most needs answered, they answer it and we don’t. The second is traceability that actually works in practice: the site states “each solution is assigned a batch code, which is a unique series of numbers specific to that batch” and that “Our customers can also see which test reports belong to their specific batch”, and the Test Report Data page listed several hundred entries under BA-prefixed codes spanning documents dated from 2016 to 2026. The enclomiphene citrate listing showed reports tied to batch numbers BA2195 and BA2198.
A named laboratory, a statement of who synthesises the raw compound before Chemyo formulates and bottles it, and bacterial endotoxin or sterility results were not listed on the pages reviewed on 8 September 2026, its last day of trading. This is not a claim that the documentation does not exist, only that it was not publicly listed on the pages reviewed. Product pages reviewed carried the line “For laboratory research use only. Not for human or animal use.” Among other sites in the category, Swiss Chems states it sells “SARMs, peptides, and nootropics for laboratory research” with “99% Purity Guaranteed”, and Behemoth Labz states that it “does not sell, manufacture, or ship any product directly”.
Side by side: what each site publishes before checkout
| Attribute | Blank Peptides | Chemyo |
|---|---|---|
| Synthesises in-house | Yes, own cGMP laboratory, full chain of custody | States formulating, mixing, bottling, sealing and batch coding; origin of raw material not stated — verify |
| Third-party lab named | Freedom Diagnostics and Horizon Analytical | States an unnamed US test center; no laboratory named — verify |
| HPLC purity | >99% per lot | States “99%+ Purity” by third-party HPLC |
| MS identity | Every lot | States FTIR for identity; some archived reports reference LC-MS and GC-MS — verify |
| Endotoxin and sterility | Both, every lot | Not listed on the pages reviewed on 8 September 2026, its last day of trading — verify |
| Batch COA before purchase | Yes, lot-tied, at blankpeptides.com/coas/ | States results are published in full for review before purchase, keyed to a batch code |
| Multi-compound mg split disclosed | Yes, per component on every blend | States per-bottle strengths in value packs, such as LGD-4033 10 mg/ml and MK-677 25 mg/ml as two bottles |
| Catalog size | 34 compounds | 18 solutions listed plus powders, solvents, nootropics and lab supplies; no peptides listed — verify |
How to verify either supplier yourself
- Choose the single product you’d actually order and trace it end to end: find its batch or lot code, then find the report bearing that code. A site that makes this take more than two minutes is telling you something about how often buyers do it.
- Read the origin sentences literally. Formulate, bottle, supply and offer describe finishing and distribution; synthesise and manufacture describe making. Whichever you find, email the vendor and ask who makes the raw compound, then keep the reply.
- Contact the laboratory named on a certificate directly and ask whether it issued that report number. Where no lab is named, that’s the question to put to the vendor first, before anything about price or delivery.
- Check the panel against your application rather than against the vendor’s marketing. Liquid solutions need a concentration assay; anything touching cell culture needs endotoxin and sterility; a chromatogram alone covers neither.
- Run the supplier verification checklist on every shortlisted site, including ours, before the first order goes in.
Short answer · updated 11 September 2026
Chemyo closed permanently on 8 September 2026. The notice is on chemyo.com, the company has stopped accepting payment through every channel, and orders placed before the 8th are still being fulfilled as normal. No reason was given for the closure, and we’re not going to invent one.
Before you order anywhere else
Several shops carrying the Chemyo name are still taking orders, and at least one is running a discount code built on the name and advertising same-day shipping as though nothing happened. Chemyo LLC named a single address on its own terms page, and that address now says the company doesn’t accept payment anywhere. So if the site in front of you is happily taking your card under that name, it isn’t them.
Chemyo sold SARMs. We don’t.
Let’s save you a click. Chemyo’s catalog was SARMs, SERMs, nootropics and solvents, mostly sold as pre-mixed liquid solutions, and no peptides appeared in its listings. Blank Peptides is a research peptide laboratory, so if you came here looking for RAD-140 or MK-677 we aren’t your replacement and we’d rather say so than have you find out at checkout.
Where the two catalogs actually meet is recovery and repair research, which is what a lot of people were running those solutions for in the first place. If that’s the direction your work is going, this is what we make, and every lot leaves with identity, purity above 99%, bacterial endotoxin and sterility from two named laboratories rather than an unnamed test centre.
Every lot number above has its report published at blankpeptides.com/coas, tied to the code printed on the vial you receive. Research use only, in vitro, not for human or animal use.
The five checks, on one page
Provenance, named laboratory, panel scope, batch traceability, stated composition. The same standard this article holds Chemyo to, condensed so you can run it against whoever you pick next. Leave a name and an email and it opens right here.
We keep the address for batch and restock notices. Unsubscribe in one click, any time.
Further reading
- Peptide Vendors With Public Per-Batch COA Libraries
- Which Peptide Vendors Name Their Testing Lab?
- Best Research Peptide Suppliers: Ranked by What They Document
- Which Peptide Vendors Disclose Blend Composition?
Frequently asked questions
What are the best sites like Chemyo?
It depends what you're matching. For SARMs and nootropics in solution, the closest comparisons are other solution vendors, and Chemyo's published archive and concentration assays set a real standard to measure them against. For research peptides, Chemyo listed none at any point we reviewed, so you're choosing in a different category and should weigh endotoxin, sterility and named labs.
Does Chemyo publish lab reports before purchase?
on the pages reviewed on 8 September 2026, its last day of trading, the site states that results are published in full "so you can review them before you buy", and its Test Report Data page listed several hundred entries organised by batch code with documents dated from 2016 to 2026. Whether a report matching the batch you'd receive is available is worth confirming on the specific product page.
What testing does Chemyo state it runs?
Chemyo states independent third-party verification for identity, purity and concentration, with FTIR used for identity and HPLC for purity and concentration. Some archived report filenames reference LC-MS and GC-MS. Bacterial endotoxin and sterility results were not listed on the pages reviewed on 8 September 2026, its last day of trading, which is expected for a catalog that lists no peptides.
Should I pick a supplier on catalog size?
Catalog size tells you about range rather than quality, and it cuts both ways. A broad catalog saves you from splitting an order across vendors. A narrow one is easier to document completely, since every additional compound is another set of reports to commission. Decide which problem you have, then check the documentation for the specific product you want.
Are these products for human use?
No. Every compound referenced here, from any vendor named, is intended strictly for in-vitro laboratory research by qualified professionals. Chemyo's terms state that products "are intended for laboratory research use only", and Blank Peptides labels every listing research-use-only. Nothing in this article should be read as guidance for any other purpose.
For research use only. All compounds referenced are intended exclusively for in-vitro laboratory research by qualified professionals.
Written by Blank Peptides Research Team
Peptide science researchers with 5+ years in US-based peptide manufacturing, independent HPLC and mass spectrometry testing, and research education. All content is reviewed for scientific accuracy before publication.
REVIEWED BY
Dr. Tobias S — PhD Chemist, Peptide and Unnatural Amino Acid Synthesis
Dr. Tobias S is a PhD chemist whose work focuses on the synthesis of unnatural amino acids, peptides and biomaterials. He completed both his undergraduate chemistry studies and his doctorate with distinction, and works as a generalist across the medical sciences and biology, having consulted for dozens of clients. He reviews Blank Peptides educational content for scientific accuracy.
Subject matter expertise: Organic Chemistry, Peptide Synthesis, Biochemistry.
