The molecule we identify.
The assays we run on CJC-1295 / Ipamorelin.
The failure modes we see most.
- 01DAC vs no-DAC mislabeling. Labels say 'CJC-1295' without specifying variant. LC-MS shows whether the vial has the long-acting DAC version (3647 Da) or the short-acting Mod GRF 1-29 (3367.85 Da).
- 02Blend ratio drift. Labels say 2:1 CJC:Ipa; actual lab measurement frequently shows 4:1 to 5:1 because manufacturers under-fill the more expensive peptide.
- 03Net Peptide Content gap on both peptides simultaneously. Compounded vial mass appears correct but each peptide's active fraction is low.
- 04Ipamorelin oxidation. Ipamorelin's aromatic residues oxidize during storage; +16 Da variant inflates apparent purity on HPLC-only panels.
- 05Endotoxin from the blending process itself. Bulk peptide may pass LAL but blending-and-fill steps introduce contamination if not done aseptically.
Transparent panels for CJC-1295 / Ipamorelin.
HPLC blend ratio + LC-MS identity for each peptide (DAC vs no-DAC) + Net Peptide Content. The starting receipt — public COA + accession #.
- HPLC blend-ratio quantification
- LC-MS identity (both peptides)
- DAC vs no-DAC confirmation
- Net Peptide Content per peptide
- Public COA + accession #
COA Essentials plus USP <85> endotoxin (LAL) and USP <71> sterility. The injectable-grade package.
- Everything in COA Essentials
- Endotoxin (LAL) USP <85>
- Sterility USP <71>
- Conformity Testing +1
- 5-7 day turnaround
Plus heavy metals (ICP-MS, USP <232>) and USP <61> bioburden. The full vendor / compounding COA.
- Everything in Injectable Safety
- Heavy metals (ICP-MS) USP <232>
- Bioburden (USP <61>)
- 5-7 day turnaround
CJC-1295 / Ipamorelin testing — the common questions.
What's the difference between CJC-1295 with DAC and without DAC?+
CJC-1295 with DAC (Drug Affinity Complex, sometimes called CJC-1295-DAC or just CJC-1295) carries a fatty-acid maleimide modification that binds albumin and extends the in-vivo half-life to about 6-8 days. CJC-1295 without DAC (also called Mod GRF 1-29) has the same sequence minus the DAC modification, with a half-life of ~30 minutes. These are very different molecules pharmacologically — DAC supports once-weekly dosing, no-DAC requires multiple daily doses. Vials labeled just 'CJC-1295' without specifying are ambiguous; LC-MS tells you which one is actually in the vial.
Why test a blend ratio? Can't I just trust the label?+
Field data: across ~200 CJC-Ipa blend submissions we've tested, labeled 2:1 CJC:Ipa actually measures 3.5:1 to 5:1 in roughly 60 % of cases. Manufacturers under-fill the more expensive peptide. The blend ratio assay measures actual mg of each peptide; pricing then makes sense relative to what's actually in the vial.
Can you test the same vial for both CJC and Ipa?+
Yes. Single submission, single chromatogram, both peptides quantified separately. We tune the HPLC gradient to resolve any co-elution between the two peptides — both report independent purity %, retention time, and MS identity on the same COA.
What sample size do you need for a blend?+
Single 2 mg blended vial (whatever the combined labeled mass is). We re-use the dissolved material across HPLC blend-ratio, LC-MS dual identity, and NPC assays. For Vendor Full QC, send two additional vials for sterility and endotoxin (destructive).
Will you test pre-mixed blends or separate vials?+
Both. Pre-mixed blended vials run on a single dual-component HPLC method. Separate vials (one CJC + one Ipa, labeled as a 'stack') run individually with each peptide on its own panel. Pricing matches: blend = single $239 / $549 / $799; separates = two individual peptide-panel orders.
What's the bigger quality risk — purity or blend ratio?+
Blend ratio, by a meaningful margin. Most submissions show CJC purity 92-97 % and Ipa purity 89-95 %, which is within reasonable for research-grade material. But the blend ratio gap (labeled 2:1 vs actual 4:1) means dose calculations are off by 100 % on the Ipa side. That's the bigger practical problem if dose accuracy matters.
Other growth-hormone-releasing peptide blend testing —
Verify the blend. Sign the COA.
Blend ratio, dual identity, NPC per peptide, endotoxin, sterility — Houston bench, public COA, transparent pricing.