What does CJC stand for?

ConjuChem, the company that developed the compound.

Does 1295 have chemical meaning?

No. It is an internal series number. The molecular weight is 3647.2 Da with DAC and the peptide has 29 residues.

Why is the name a problem?

It names a programme, not a molecule, so it covers both the DAC and non-DAC forms: compounds differing by 279.3 Da and vastly in half-life.

What Does CJC-1295 Stand For?

The short answer

CJC refers to ConjuChem, the company that developed it. The 1295 is an internal series number carrying no chemical information. The name identifies a development programme, which is why it fails to distinguish the DAC and non-DAC forms.

Key facts

CJC: ConjuChem, the developer
1295: Internal series number
Chemical meaning of 1295: None
Covers: Both DAC and non-DAC forms
Masses covered: 3647.2 and 3367.9 Da
Ipamorelin code: NNC 26-0161 (Novo Nordisk)

The company prefix

CJC is ConjuChem. Company-initial prefixes are a common development convention: NNC for Novo Nordisk (which is where ipamorelin's NNC 26-0161 comes from), LY for Eli Lilly, BI for Boehringer Ingelheim. The prefix identifies who made it, not what it is.

What the number does not mean

It is not a molecular weight, not a dose, not a residue count. CJC-1295 is 3647.2 Da with DAC and has 29 residues. As with TB-500's 500 and BPC-157's 157, the number is an internal designation, and reading chemistry into it is a recurring error across this whole field.

Research material referenced

CJC-1295 + Ipamorelin 5+5mg, third-party HPLC tested

Buy CJC-1295 + Ipamorelin · £36.99

Why the name is actively unhelpful here

This is worse than the usual case. Because CJC-1295 names a programme rather than a molecule, it covers both the DAC-conjugated peptide and the DAC-free one, two compounds differing by 279.3 Da and by two orders of magnitude in half-life. A name that cannot distinguish those is not merely uninformative; it actively obscures the most important difference.

What to use instead

CJC-1295 with DAC, or Modified GRF (1-29) for the DAC-free form. Better still, quote the molecular weight (3647.2 or 3367.9), which admits no ambiguity at all. Where a supplier says only CJC-1295, the mass on the certificate is the field that resolves it.

The pattern across this library

TB-500, BPC-157, CJC-1295 and DSIP are all development codes that outlived their programmes and became product names. Compounds that reach approval get generic names; compounds that do not keep their codes. The presence of a code as a product name is itself a small piece of information about where a compound got to.

Frequently asked questions

What does CJC stand for?: ConjuChem, the company that developed the compound.
Does 1295 have chemical meaning?: No. It is an internal series number. The molecular weight is 3647.2 Da with DAC and the peptide has 29 residues.
Why is the name a problem?: It names a programme, not a molecule, so it covers both the DAC and non-DAC forms: compounds differing by 279.3 Da and vastly in half-life.

Extended research context

The CJC-1295 & Ipamorelin deep dive

Deep dive: why CJC-1295 and Ipamorelin are studied together

CJC-1295 is a modified GHRH (growth-hormone-releasing hormone) analogue; Ipamorelin is a selective growth-hormone secretagogue that binds the ghrelin receptor (GHS-R1a). In pituitary-cell research models the two act on independent pathways whose downstream effect converges on GH release. CJC-1295 amplifies the endogenous GHRH signal while Ipamorelin adds a separate ghrelin-pathway stimulus. That's why supplier catalogues frequently package them together as a research reference blend.

DAC vs no-DAC: which CJC-1295 is which

'CJC-1295 with DAC' contains a Drug Affinity Complex (a Lys-maleimide moiety) that binds serum albumin and extends half-life to several days. 'CJC-1295 no-DAC' (also called Modified GRF 1-29) lacks the linker and clears in minutes. These are pharmacologically different peptides. A CoA must specify which form is in the vial; mass differs (~3,367 Da with DAC vs ~3,367 minus linker for no-DAC).

Ipamorelin's selectivity profile

Unlike earlier GHS-R agonists (e.g. GHRP-6), Ipamorelin was engineered for minimal cross-activity at cortisol- and prolactin-releasing pathways in research models. That receptor selectivity is why it is the reference secretagogue for controlled pituitary-cell studies.

Research applications

▸Pituitary-cell GH-release assays (comparator vs GHRH and hexarelin)
▸Half-life comparison studies: DAC vs no-DAC CJC-1295 forms
▸Ghrelin-receptor binding assays for Ipamorelin analogue development
▸Analytical HPLC method development for lipidated GHRH analogues
▸Stability testing under refrigerated storage

Handling checklist

✓Store lyophilised at −20 °C long-term
✓Reconstitute in bacteriostatic water; both peptides dissolve readily
✓Aliquot immediately, refrigerate at 2–8 °C, use within 28 days
✓Confirm salt form and DAC/no-DAC status on CoA before starting a study
✓Do not use for human administration (research reference only)

Common research-handling mistakes

Learnt from thousands of researcher orders across our UK labs.

✗ Confusing DAC and no-DAC CJC-1295

Fix: Check the CoA. The two have very different pharmacokinetics.

✗ Assuming Ipamorelin acts on GHRH receptors

Fix: It binds the ghrelin receptor (GHS-R1a), a separate pathway from CJC-1295.

✗ Storing reconstituted solution at room temperature

Fix: Refrigerate 2–8 °C after reconstitution.

Continue researching

Peer-reviewed guides, comparators and matched reference materials.

Primary sources & clinical trials

Peer-reviewed research and registered trials from PubMed, ClinicalTrials.gov, PubChem, FDA and NIH. All links open in a new tab and point to the primary source, so every claim can be verified at origin.

UKP

Written and reviewed by

The UK Peptides Editorial Team · Research library, UK Peptides

The editorial team is responsible for supplier selection, batch release decisions and the content published in this research library. Every article here is sourced to primary literature and every product page to a signed third-party certificate. Corrections are made in place and the review date updated.

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