CJC-1295 has a naming problem that nothing else in this category quite matches, and it’s the reason comparing vendors on this compound is harder than it looks. The name gets used commercially for two different molecules. One is the DAC-conjugated analog, carrying a drug affinity complex moiety, with a molecular weight around 3,647. The other is Mod GRF 1-29, which is the same 29-residue backbone without that conjugate, sitting near 3,368. Plenty of listings say “CJC-1295” and mean the second one. Some say it and mean the first. A few say it and never clarify.
Which puts you in an awkward spot before you’ve even started on purity figures. You open six tabs, four say CJC-1295, two of those turn out to be Mod GRF once you read the small print, and the prices differ in ways that might reflect the molecule or might reflect nothing at all. Then every page tells you it’s third-party tested to 99% and you’re back where you started.
So this piece narrows things down. I’ll set five documentation questions that apply to any CJC-1295 with DAC listing, then look at what four named vendors publicly stated on their own pages on 2026-09-08, and lay all of it against the standard Blank Peptides publishes its own lots to. I’m describing what was visible on those pages and nothing beyond that, because a certificate that isn’t linked is a different fact from a certificate that doesn’t exist.
Key takeaways
- Judge a CJC-1295 with DAC listing on five documented things: who made it, which laboratory tested it, what the panel covered, whether you can open the certificate before paying, and whether the page distinguishes the DAC form from Mod GRF 1-29 clearly enough to be sure which molecule you’re buying.
- Blank Peptides synthesises, vials and releases CJC-1295 with DAC in its own cGMP laboratory, listing it as a separate catalog entry from the no-DAC form, with identity, >99% purity, bacterial endotoxin and sterility run per lot by Freedom Diagnostics and Horizon Analytical.
- Of the four vendors reviewed, Swiss Chems lists both DAC and no-DAC forms as separate products and links a catalog-wide test results page, Ascend Bio Labs states its certificate carries the batch number, test date and laboratory name and is posted before the lot ships, PSPeptides links dated certificate PDFs with a batch reference, and Core Peptides’ CJC-1295 listings on the pages reviewed were blends and a Mod GRF 1-29 no-DAC product.
- No CJC-1295 with DAC page reviewed on 2026-09-08 published a measured mass alongside the purity figure on the product page itself.
- Every product and comparison discussed here concerns material sold for in-vitro laboratory research by qualified professionals only.
What separates a well-documented CJC-1295 with DAC listing from a vague one?
Before naming anyone, here’s the frame I use, and I’d rather you apply it to us as hard as you apply it to anyone else.
The first question is provenance. Does the vendor state that it synthesised the material, or does it describe supplying material made somewhere else? Both are legitimate businesses. The answer changes what a certificate can tell you, because a synthesiser’s report describes their own process output while a distributor’s report describes whatever arrived in the drum they bought.
Second, is the testing laboratory named? “Independently verified” with no name attached gives you nothing to check. A named lab can be phoned, and you can quote a report number and ask whether the document is genuine. Without a name, the certificate is a promise typeset to look like evidence.
Third, what does the panel cover? HPLC reports chromatographic purity, the fraction of the sample eluting as the target peak. Mass spectrometry confirms which molecule that peak is, and for this compound that’s the whole ballgame. The DAC-conjugated form and the unconjugated backbone differ by roughly 280 daltons, which is a wide, unmistakable gap on a mass spectrum and completely invisible on a purity figure alone. Bacterial endotoxin and sterility catch contamination that neither chromatographic method sees.
Fourth, access and lot linkage. You should be able to read the report before you order, and it should carry a lot number matching the vial label when the package lands. A report available only after payment doesn’t let you verify anything in advance.
Fifth, product naming. Does the page state DAC or no-DAC in the product title, or does it leave you inferring from a formula buried in a specification table? Vendors that list both forms as separate products with separate prices have already answered the question. Vendors that list one product called CJC-1295 have not.
How Blank Peptides makes and tests each lot
Blank Peptides operates its own cGMP laboratory in the United States and performs synthesis, vialing, lyophilization, labeling and quality control release in-house. The company describes this as holding the chain of custody itself rather than relabeling or brokering material made elsewhere, and it also contract-manufactures and fulfils for other research peptide brands as a separate line of business.
Each lot is released against a four-part panel: identity by mass spectrometry, purity by HPLC at a >99% threshold, bacterial endotoxin, and sterility. Analysis is carried out by two named independent laboratories, Freedom Diagnostics and Horizon Analytical, and the reports are posted as batch certificates of analysis that a buyer can open before ordering. Every vial carries the lot number matching its certificate, and lyophilized material is dated for roughly 24 months from release.
CJC-1295 with DAC is listed in the catalog as its own entry, separate from the no-DAC form, which removes the ambiguity at the point where most of it gets introduced. The blends across the catalog state composition per component: GLOW at 70mg (GHK-Cu, BPC-157, TB-500), KLOW at 80mg (those three plus KPV), and Wolverine at 20mg (BPC-157 and TB-500). The catalog holds 34 compounds. Orders are processed within one business day and ship at room temperature, which suits lyophilized peptide without cold-chain handling. The company has operated for five years and sells for research use only.
What four CJC-1295 with DAC vendors publicly state
Here’s what was visible on 2026-09-08, vendor by vendor, quoting their own pages.
Swiss Chems lists “CJC-1295 with DAC” at 2mg per vial as a distinct product from “CJC-1295 without DAC”, also at 2mg, at different prices. The DAC page gives the formula as C165H269N47O46 with a molar mass of 3647.2 g/mol, states “99% Purity Guaranteed” and “Independently Lab Tested”, and states that “Every batch is independently lab tested for identity, purity and potency”. A “View Lab Results” link points to the site’s independent test results page rather than to a document embedded in the listing. The page states “This product is intended for research purposes only” and that the compound “should only be handled by licensed and qualified professionals.”
Ascend Bio Labs lists CJC-1295 with DAC at 5mg per vial, states “99.1%” purity, and states “Every batch is tested by an independent lab using HPLC for purity and LC-MS for identity.” On documentation, its page states “The COA is stamped with the batch number, test date, and lab name and uploaded to this page before any vial from that lot ships”, with the matching certificate also available in account downloads after purchase. That pre-ship upload commitment is the clearest statement about timing I found across these four. No laboratory was named in the page prose reviewed.
PSPeptides lists “CJC-1295 With DAC” at 5mg per vial in its growth hormone and regeneration category and states “99%+ purity (third-party HPLC and mass spectrometry)”. The page references a certificate for batch PSP-0029117 with separate HPLC, heavy metals and endotoxin documents dated June 2026, and states “All PSPeptides products are sold exclusively for laboratory and research use. Not intended for human consumption.” No issuing laboratory was named in the page prose reviewed. The company lists a “CJC-1295 No DAC Modified GRF 1-29” product separately, so the two forms are distinguishable by title.
Core Peptides returned thirteen results for a CJC-1295 search on 2026-09-08, and the listings visible were blends alongside a standalone “CJC-1295 NO DAC (Mod GRF 1-29)” at 5mg. No standalone with-DAC listing surfaced in that search. Its footer states products are “sold for research, laboratory, or analytical purposes only, and are not for human consumption.” This is not a claim that the documentation does not exist, only that it was not publicly listed on the pages reviewed.
Where these vendors beat us outright: Swiss Chems offers a 2mg vial where most of this category starts at 5mg, and publishes a browsable catalog-wide test results archive that goes deeper as a historical record than a current-lot library. PSPeptides adds heavy metals reporting, which we don’t currently show. Both are real advantages.
Side by side: CJC-1295 with DAC documentation
| Attribute | Blank Peptides | typical vendor |
|---|---|---|
| Synthesises in-house | Own cGMP lab; synthesis through QC release under one roof | States third-party testing without stating who made the material — verify |
| Third-party lab named | Freedom Diagnostics and Horizon Analytical, named in prose | States “an independent lab”; one page states the name appears on the certificate stamp — verify |
| HPLC purity | >99% per lot | States 99%, 99.1% or 99%+ on the listing — verify |
| MS identity | Confirmed per lot by mass spectrometry | States LC-MS identity on some pages; no measured mass shown on the listings reviewed — verify |
| Endotoxin and sterility | Both tested and reported per lot | States endotoxin on some pages; sterility not listed on the pages reviewed 2026-09-08 — verify |
| Batch COA before purchase | Public library at /coas/, lot-numbered, every lot | States pre-ship upload on one page, a catalog-wide results page on another — verify |
| DAC and no-DAC listed separately | Two distinct catalog entries | States both forms separately on most sites; some list only the no-DAC form under the CJC-1295 name — verify |
| Blend mg split disclosed | GLOW, KLOW and Wolverine each itemised per component | States a total milligram figure on several CJC-1295 blend pages — verify |
| Research-use labelling | Research use only, stated on every listing | States “not for human consumption” in footer or product text |
How to verify either supplier yourself
- Settle which molecule the listing describes before anything else, by finding either the words “with DAC” in the title or a molar mass near 3,647 in the specification table.
- Look for a link rather than a badge, and note whether that link opens a document for your lot or drops you on a general results page you then have to search.
- Read the date and lot number on whatever PDF you find, then decide whether a report from several months back plausibly describes the vial being packed for you today.
- Call the laboratory named on the certificate and ask them to confirm the report number, because a real contract lab will answer that and an invented one has nobody to pick up.
- Walk the whole process once using the supplier verification checklist before your first order with any new vendor.
Further reading
- Which Peptide Vendors Name Their Testing Lab?
- Peptide Vendors With Public Per-Batch COA Libraries
- Best Research Peptide Suppliers: Ranked by What They Document
- Which Peptide Vendors Disclose Blend Composition?
Frequently asked questions
Who are the best CJC-1295 with DAC vendors on documentation?
The ones whose page states the DAC form in the title, links a dated and lot-numbered certificate you can open before paying, names the laboratory that ran it, and reports contamination testing alongside purity. Of the pages reviewed 2026-09-08, Swiss Chems and PSPeptides listed both forms separately, Ascend Bio Labs stated its certificate is posted before shipping, and Blank Peptides publishes a four-part panel per lot.
How do I tell CJC-1295 with DAC from Mod GRF 1-29?
By mass. The DAC-conjugated form sits near 3,647 daltons and the unconjugated backbone near 3,368, a gap of roughly 280 that a mass spectrum resolves immediately. Product titles are less reliable, since some listings use “CJC-1295” for the no-DAC molecule, so the specification table or the certificate’s identity line settles it.
Does a 99% purity claim on a CJC-1295 page mean anything?
On its own, not much, because the figure is usually typed into the page rather than pulled from a document, and purity says nothing about which of the two molecules you’ve been sent. It becomes useful beside a certificate that names the lab, gives the method, carries a lot number, and reports an identity result.
What tests should a CJC-1295 with DAC certificate include?
Four lines cover the useful ground: HPLC for chromatographic purity, mass spectrometry for identity, bacterial endotoxin, and sterility. Purity was reported on every page reviewed 2026-09-08, endotoxin on some, and sterility on none of the compound pages themselves. Identity matters more here than for most peptides because of the naming overlap.
Are these products for human use?
No. Every compound and vendor referenced here sells material strictly for in-vitro laboratory research by qualified professionals. Blank Peptides sells for research use only, and the vendor pages reviewed each carry their own statement that products are not for human consumption. Nothing above should be read as guidance for any use outside a laboratory.
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.
