A verified cjc-1295 dac coa (Certificate of Analysis) provides laboratory researchers with lot-specific documentation confirming chemical identity, peptide purity, and sterility standards. High-grade research material requires reverse-phase high-performance liquid chromatography (RP-HPLC) displaying greater than 98% purity, electrospray ionization mass spectrometry (ESI-MS) verifying the expected molecular mass of approximately 3647.28 Da, and chromogenic endotoxin testing ensuring safe application in controlled in vitro and preclinical models.
A verified cjc-1295 dac coa (Certificate of Analysis) provides laboratory researchers with lot-specific documentation confirming chemical identity, peptide purity, and sterility standards. High-grade research material requires reverse-phase high-performance liquid chromatography (RP-HPLC) displaying greater than 98% purity, electrospray ionization mass spectrometry (ESI-MS) verifying the expected molecular mass of approximately 3647.28 Da, and chromogenic endotoxin testing ensuring safe application in controlled in vitro and preclinical models.
In modern peptide synthesis, evaluating a cjc-1295 dac coa is the primary step for researchers seeking to eliminate confounding variables in experimental assays. CJC-1295 with DAC (Drug Affinity Complex) is a synthetic 30-amino acid analog of Growth Hormone-Releasing Hormone (GHRH) modified at the C-terminus with a maleimidopropionic acid linker. This chemical modification allows covalent bonding to endogenous plasma proteins—primarily serum albumin—extending its biological half-life in animal models. Because structural integrity directly impacts receptor affinity and binding kinetics, empirical verification through a comprehensive Certificate of Analysis (COA) is essential.
A rigorous COA from an ISO 17025 accredited analytical facility must report three core metrics: chemical purity percentage derived from High-Performance Liquid Chromatography (HPLC), exact mass identity verified through Mass Spectrometry (MS), and micro-biological purity measured via bacterial endotoxin testing. When reviewing research documentation through our research library hub, scientists can cross-reference batch numbers to ensure that the material received strictly matches the analytical spectra published for that specific manufacturing run.
Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) serves as the gold standard for quantifying the purity of synthesized peptides. The method operates by separating chemical species based on hydrophobic interactions between the peptide molecules and a stationary C18 column. As the mobile phase gradient shifts, compounds elute at specific retention times, producing distinct peaks on an ultraviolet detector set to 214 nm or 220 nm—the absorption wavelengths for peptide bonds.
When evaluating a **cjc-1295 dac coa**, the main chromatogram peak corresponds to target CJC-1295 DAC sequence. Area-under-the-curve (AUC) integration measures the target peak relative to minor secondary peaks representing deletion sequences, truncated peptides, or chemical side-products (such as oxidized methionine residues or deamidated species). Laboratories utilizing our research peptides catalogue demand an absolute target peak integration of >98.0%. Minor impurities can inadvertently trigger non-specific cellular signaling or alter growth hormone secretagogue receptor (GHS-R) kinetics, rendering experimental data unreliable.
While RP-HPLC confirms the relative concentration of the primary peptide species, Mass Spectrometry (MS) is required to verify its precise molecular mass and chemical identity. CJC-1295 with DAC has a calculated monoisotopic mass of 3647.28 Da (with a nominal molecular weight of approximately 3647.7 Da). Electrospray Ionization Mass Spectrometry (ESI-MS) soft-ionizes the sample, generating multiple charge states (such as [M+3H]3+, [M+4H]4+, and [M+5H]5+) across the mass-to-charge (m/z) spectrum.
An authentic COA displays the deconvoluted mass spectrum, which must match the theoretical molecular weight of CJC-1295 DAC within a strict tolerance window (typically ±1.0 Da). Discrepancies in the observed mass indicate structural errors, such as missing amino acid residues, incorrect linker attachment, or incomplete deprotection during solid-phase peptide synthesis (SPPS). Researchers analyzing GHRH analogs can review structural parameters on our CJC-1295 DAC product page to verify molecular formula consistency against third-party laboratory data.
Bacterial endotoxins—lipopolysaccharides (LPS) derived from the outer membrane of Gram-negative bacteria—are common contaminants in peptide manufacturing. In cell culture models or animal studies, trace levels of endotoxin can induce inflammatory responses, activating NF-κB pathways, elevating pro-inflammatory cytokines (such as TNF-α and IL-6), and confounding metabolic research outcomes.
Quality verification via a **cjc-1295 dac coa** must include a Limulus Amebocyte Lysate (LAL) or recombinant Factor C assay reporting endotoxin content in Endotoxin Units per milligram (EU/mg). High-purity laboratory standards mandate endotoxin levels below 0.5 EU/mg, with premium research-grade batches measuring <0.1 EU/mg. For institutions conducting sensitive cellular signaling experiments, sourcing peptides with verified endotoxin limits prevents artifactual data and ensures reproducible results across cell lines.
In preclinical literature, GHRH analogs are evaluated to compare receptor affinity, signaling duration, and downstream IGF-1 upregulation. Understanding the structural differences across these peptides highlights why specific analytical testing is required for each class.
CJC-1295 DAC incorporates a maleimide-containing complex that covalently binds to plasma albumin *in vivo*, drastically extending its half-life compared to short-acting modified GHRH variants. In contrast, CJC-1295 No DAC (also known as Mod GRF 1-29) lacks the bioconjugate linker, resulting in rapid enzymatic degradation by dipeptidyl peptidase-IV (DPP-IV). Similarly, Sermorelin represents the truncated 29-amino-acid native GHRH core sequence without N-terminal stabilization. For detailed experimental comparisons of secretagogue kinetics, consult our CJC-1295 DAC vs No DAC comparison guide. Furthermore, co-administration assays frequently examine GHRH analogs alongside ghrelin mimetics like Ipamorelin to investigate dual-receptor synergistic GH release.
Proper reconstitution techniques are vital to maintain peptide integrity following receipt of a tested lot. CJC-1295 DAC is supplied as a lyophilized (freeze-dried) powder requiring sterile reconstitution prior to *in vitro* or analytical application.
To reconstitute the compound, allow the vial to equilibrate to room temperature before inserting a needle to equalize internal pressure. Slowly add Bacteriostatic Water or sterile 0.9% sodium chloride along the glass wall of the vial, avoiding direct high-velocity stream impact onto the lyophilized cake. Gently swirl the vial until complete dissolution occurs; never vortex or vigorously agitate the solution, as mechanical shear stress can disrupt secondary peptide structures or promote aggregation. Once reconstituted, stock solutions should be aliquoted into low-binding polypropylene micro-tubes to avoid surface adsorption during repeated freeze-thaw cycles.
Lyophilized CJC-1295 DAC exhibits superior thermal stability when stored under controlled conditions. Desiccated sealed vials should be kept at -20°C for long-term storage (up to 24 months) or 2°C to 8°C for short-term operational handling (up to 90 days). Exposure to moisture, direct ultraviolet light, or elevated temperatures accelerates peptide degradation pathways, including oxidation of labile residues and peptide bond hydrolysis.
Reconstituted liquid solutions are significantly less stable and must be maintained at 2°C to 8°C, ideally used within 14 to 30 days depending on the solvent system and antibacterial preservatives used. Research facilities managing large-scale screening projects can coordinate volume supply requirements through our wholesale lab portal to ensure steady access to freshly lyophilized, lot-tested batches.
Sourcing laboratory compounds requires absolute supply chain transparency and verifiable quality assurance. PX1 Research operates under strict quality protocols, ensuring that every batch of research peptides is synthesized in GMP-compliant facilities within the United States.
Every single production lot undergoes rigorous independent testing at an accredited ISO 17025 laboratory. Chromatograms, mass spectra, and endotoxin certificates are made directly accessible to verifying researchers. Furthermore, PX1 Research provides same-day dispatch for all orders placed Monday through Friday, shipping directly from specialized fulfillment centers in California and Arizona to minimize transit stress on temperature-sensitive research materials.
What is a cjc-1295 dac coa?
A cjc-1295 dac coa (Certificate of Analysis) is an official laboratory report produced by an independent analytical testing facility. It documents lot-specific purity percentages via RP-HPLC, molecular weight validation via ESI-MS, and bacterial endotoxin levels to confirm the compound meets research specifications.
What purity level should be expected on a CJC-1295 DAC COA?
High-purity research grade CJC-1295 DAC must show a minimum target peak purity of 98.0% via RP-HPLC. Batches demonstrating purity below 98.0% contain excessive synthesis side-products or truncated sequences that can interfere with experimental outcomes.
What is the theoretical molecular mass listed on a CJC-1295 DAC COA?
The theoretical molecular mass of CJC-1295 with DAC is approximately 3647.28 Da. Mass spectrometry analytical testing should show a deconvoluted peak matching this mass within a ±1.0 Da tolerance.
How do I verify the authenticity of a CJC-1295 DAC COA?
Authentic COAs list a unique lot/batch number, testing date, methodology parameters (such as column type and solvent gradients), and contact details for the independent ISO 17025 testing laboratory. Researchers can match the lot number on their vial directly to the published document.
What is the acceptable endotoxin limit for CJC-1295 DAC research use?
For reliable cell culture and preclinical animal models, endotoxin levels should be below 0.5 EU/mg, with optimal premium batches testing under 0.1 EU/mg as measured by LAL assays.
How does CJC-1295 DAC analytical data differ from CJC-1295 No DAC?
CJC-1295 DAC includes a Drug Affinity Complex linker resulting in a higher molecular weight (~3647.28 Da) and distinct HPLC retention characteristics compared to CJC-1295 No DAC (Mod GRF 1-29), which has a molecular mass of ~3367.9 Da.
What solvent should be used for reconstituting CJC-1295 DAC for lab assays?
CJC-1295 DAC is commonly reconstituted using sterile Bacteriostatic Water (0.9% benzyl alcohol) or sterile 0.9% Sodium Chloride injection, depending on the specific demands of the experimental protocol.
How should CJC-1295 DAC vials be stored upon arrival in the lab?
Lyophilized vials should be stored at -20°C for long-term stability or at 2°C to 8°C for short-term use. Protected from light and moisture, un-reconstituted vials remain stable for up to 24 months.
Are PX1 Research peptides manufactured in the USA?
Yes, PX1 Research compounds are USA-manufactured in GMP-compliant facilities and tested in ISO 17025 accredited laboratories with full batch traceability.
Where can I view related GHRH research compounds?
Researchers can explore analytical reports and specifications for related secretagogues in our comprehensive [GHRH analogs research guide](/research-peptides/ghrh-analogs-guide) and product library.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.