CJC-1295 test and ipamorelin test: which molecule, what a full panel shows and how samples fail

What a CJC-1295 test should show

A CJC-1295 test should answer three questions: which molecule is in the vial, how pure it is, and how many mg of it the vial holds. The first question decides the other two, because sellers use “CJC-1295” for two different molecules. An ipamorelin test asks the same three questions about a much smaller peptide.

Test	What it answers	Reported as
Identity (LC-MS)	Is the main peptide CJC-1295 with DAC, without DAC, ipamorelin or something else?	Expected and observed mass, error
Purity (HPLC)	What share of the UV-absorbing material is the target peptide?	% peak area at a stated wavelength
Content per vial	How many mg of the target peptide, against a reference standard of the same molecule	mg per vial, basis, % of label
Endotoxin (LAL)	How much bacterial endotoxin is present	EU per mg and per vial
Sterility (USP <71>, 14 days)	Did microbes grow from the tested units in 14 days?	Growth or no growth

Purity and content are separate numbers. Our guide to net peptide content explains why powder weight and peptide weight differ.

CJC-1295 with DAC or without DAC: which molecule was tested

The PubChem record named CJC-1295 is the DAC form. Sellers also use the name for the version without DAC, which lab menus also call Mod GRF (1-29). The DAC form adds a lysine that carries a maleimidopropionyl group, about 279 Da.

Molecule	Formula	Monoisotopic mass	Calculated ions (m/z)
CJC-1295 without DAC (Mod GRF 1-29), 29 amino acids	C152H252N44O42	3,365.89 Da	842.48 (4+), 674.19 (5+)
CJC-1295 with DAC, 30 residues	C165H269N47O46	3,645.02 Da	912.26 (4+), 730.01 (5+)
Ipamorelin, Aib-His-D-2Nal-D-Phe-Lys-NH2	C38H49N9O5	711.39 Da	712.39 (1+), 356.70 (2+)

The formulas are PubChem’s; we calculated the ions. LC-MS separates the two CJC-1295 forms easily. The risk is a mismatch: if the lab looks for one form and the vial holds the other, the report can show a failed identity or a wrong mg.

A related peptide, sermorelin, differs from CJC-1295 without DAC at four positions and weighs only about 10 Da less (average 3,357.9 against 3,367.9 Da), so the report should print the observed mass and its error.

Ipamorelin has a different blind spot. It carries two D-amino acids, and a version with an L-amino acid in either place has the same mass. Only an HPLC method that resolves the two forms can show it. Our guide to LC-MS identity covers what mass can and cannot prove.

Lab menus show the split (published lists, September 2026):

Lab	CJC-1295 tests listed	CJC-1295 and ipamorelin blend
Janoshik	CJC-1295 DAC; CJC-1295 no DAC	Two tests: with DAC, and no DAC (Mod GRF 1-29)
Chromate	CJC-1295 DAC; CJC-1295 no DAC	Not listed; custom quote
Krause Analytical	CJC-1295; CJC-1295 DAC	CJC-1295 + ipamorelin
TrustPointe Analytics	CJC-1295 (no DAC)	Ipamorelin and CJC-1295 (no DAC)
Horizon Analytical	CJC-1295 no DAC; CJC-1295 with DAC	CJC-1295 + ipamorelin

CJC-1295 test results in published data

Finnrick publishes pass and fail counts per product. Its public data summary, read on 4 October 2026, lists 333 CJC-1295 tests from 69 vendors: 96 passed and 236 failed, about 71% of classifiable tests. Our earlier snapshot, with data to 20 September, showed 210 fails in 294 tests, a similar share. The default standard, Purity Focus, needs the right identity, HPLC purity of at least 99.5% and a fill within ±35% of the label.

Finnrick’s CJC-1295 page lists the 200 most recent tests (16 May 2025 to 24 September 2026) with the form recorded for each, and each test page prints why it failed. We counted both on 4 October 2026:

Form recorded	Tests	Passed	Failed	Not the labelled substance
CJC-1295 (No DAC)	125	61	63	10
CJC-1295 (DAC)	50	7	43	14
CJC-1295, no form recorded	25	7	18	2

One No DAC test was incomplete. Four patterns stand out:

• The DAC form failed far more often. 43 of 50 DAC samples failed, and 14 were not the labelled substance. The data do not say what those vials held.
• Purity failures spread wide. Of 88 purity failures, 26 read between 99.0% and 99.4%, but 21 read below 90%. The lowest was 17.82%.
• Fill failures ran both ways. Ten vials were more than 35% under the label and 12 more than 35% over. Five held at least twice the label claim. Three No DAC vials read 99.9% pure but held 53% to 88% less than the label.
• A fail is not always a fake. 76 of the 124 failures were on purity alone, with identity confirmed.

Our guide to which peptides fail most often puts CJC-1295 next to other compounds.

Ipamorelin test results: mostly near misses

Ipamorelin fails far less often. The same summary lists 441 ipamorelin tests from 92 vendors: 299 passed and 139 failed, about 32% of classifiable tests. Among the 200 most recent (11 December 2025 to 24 September 2026), 146 passed, 52 failed and 2 were incomplete.

Most of those failures were narrow. Of 46 purity failures, 27 read between 99.0% and 99.4%, and 37 read 98% or higher. Only 3 samples were not the labelled substance, and 7 were outside the fill window, 5 of them over the label. A 99.3% vial fails Finnrick’s default rule but clears the 98% purity line of its members-only Accuracy Focus standard. Compare a result with the rule it was judged against.

Testing a CJC-1295 and ipamorelin blend

The two peptides are often sold in one vial. A blend test must give identity and mg for each peptide, each against its own reference standard. One purity figure for the whole vial means little, because the second peptide is there by design and UV peak areas are not shares by weight.

Finnrick’s CJC-IPA page shows how thin the public data are: 8 tests, 3 passed, 4 failed and 1 incomplete. Two of the fails were not the labelled substance. In one Reddit group test of this blend, content in mg was left off the order, so the group could not tell how many mg each vial held (r/PeptidePathways). Our guide to peptide blend testing lists what a blend report should show.

How to read a CJC-1295 or ipamorelin test result

1. Find the molecule the lab tested for. For CJC-1295, the report should say with or without DAC.
2. Check identity by mass: expected mass, observed mass and the error.
3. Read purity as % of UV peak area, with the chromatogram attached.
4. Read content in mg with its basis and reference standard, and compare it with the label.
5. Match the batch on the report with your vial, and check the report on the lab’s own site.

For a group test, send several sealed vials from the same batch, plus separate sealed vials for endotoxin and sterility. Our group test checklist covers the rest.

What HK Analytical runs for CJC-1295 and ipamorelin

Our CJC-1295 and ipamorelin pages list the panel for a freeze-dried vial: identity (LC-MS), purity (HPLC), content per vial, endotoxin (LAL) and Sterility (USP <71>, 14 days). For CJC-1295 the report states whether we tested for the DAC or the no-DAC molecule. We do not offer per-component blend analysis, so we do not test the two peptides of a blend separately. Every number comes with its raw data, the report is a signed record you can check on hkanalytical.com/verify, and it carries our own photo of the vial as received. Results within days of receipt. Sterility (USP <71>, 14 days) is the one test that takes 14 days, because the method incubates for 14 days. See the example report or ask for a quote.